EC20 Series PLC User Manual Version Revision date BOM
V1.1 June 26, 2006 31011166
Emerson Network Power provides customers with technical support. Users may contact the nearest Emerson local sales office or service center.
Copyright © 2005 by Emerson Network Power Co., Ltd. All rights reserved. The contents in this document are subject to change without notice.
Emerson Network Power Co., Ltd. Address: No.1 Kefa Rd., Science & Industry Park, Nanshan District 518057, Shenzhen China Homepage: www.emersonnetworkpower.com.cn E-mail:
[email protected]
Safety Precautions To reduce the chance of accident, please read the safety precautions very carefully before operation. The "Caution, Notice, Warning, Danger" symbols in this manual do not represent all the safety points to be observed, and are only used as a supplement to various operation safety points. Therefore, the installation and operation personnel must be strictly trained and master the correct operations and all the safety points before actual operation. When operating Emerson PLC products, the safety rules in the industry, the general safety points and special safety instructions specified in this manual must be strictly observed. These notices are highlighted in the manual by a warning triangle and are marked as follows according to the level of danger: Danger: indicates that death, severe personal injury, or substantial property damage will result if proper precautions are not taken. Warning: indicates that death, severe personal injury, or substantial property damage could possibly result if proper precautions are not taken. Caution: indicates that minor personal injury or property damage can result if proper precautions are not taken. Notes for designing The programming must include safety circuit to ensure the safe application of the PLC (Programmable Logic Controller) system upon power off or the PLC malfunction. Note the following when programming: z
The external circuit of the PLC must include the emergency braking circuit, protection circuit, mutual interlock circuit of forward/reverse rotation, and the interlock switch of position upper/lower limit for preventing equipment from damage.
z
For the safe operation of the equipment and output signals of the serious accident, please design the external protection circuit and the safety mechanism.
z
All the outputs may be shutdown when the CPU of the PLC detects the abnormity of the system; the failure of part PLC circuit may result in uncontrolled PLC output. A suitable external control circuit must be designed to ensure the normal operation of the equipment.
z
When the PLC output unit such as the relay or the transistor is damaged, the PLC output cannot be controlled as ON or OFF state.
z
The PLC is designed to be used in the electrical environment of indoor area B and C☆. However, to prevent the high lightning voltage from damaging the equipment through the ports of power input, signal input or control output, a SPD should be installed in the power supply system.
☆: According to IEC61131-2, section 8.3.1 classification declaration Notes for installation z
Units should not be installed in areas subject to the following conditions: excessive or conductive dust, corrosive or flammable gas, moisture or rain, excessive heat, regular impact shocks or excessive vibration. Electric shock, fire hazard and mishandling may also damage the product.
z
Take special care not to allow metal debris and wire lead to fall inside the vent of the PLC during the screw hole processing and wiring. Otherwise there is a danger of fire, damage or faulty operation of equipment.
z
Once the installation of the new PLC is complete, remove everything on the surface of the vent, including packing goods such as protective paper. Otherwise the poor ventilation during the operation may result in fire, damage or faulty operation of equipment.
z
Do not wire, inset or pull out the cable plug with power applied. Otherwise there is a danger of electric shock or circuit damage.
z
Installation and wiring must be fastening and reliable. Bad contact may result in faulty operation of equipment.
z
The input/output cable of high frequency signal should use the shielding cable to improve the interference rejection of the system.
Notes for wiring z
Installation and wiring can be done only after the external power supplies are all disconnected. Otherwise there is a danger of electric shock or equipment damage.
z
Once the installation and wiring of the PLC is complete, cleanup the spot at once. To prevent the electric shock, replace the port cover of the product before power is on.
z
When wiring AC supplies, the ‘Live’ cable should be connected to the ‘L’ terminal and the ‘Neutral’ cable should be connected to the ‘N’ terminal. Otherwise the PLC will be damaged.
z
Don’t power +24V port of the main module by the external power supply. Otherwise the PLC will be damaged.
z
Do not lay I/O signal cables of the PLC next to other power cables or strong interference circuits.
z
Do not make the earth port (PG) of the main module and the heavy current power system share the same earthing.
Notes for operation and maintenance z
Do not touch the ports when the power is applied, otherwise there is a danger of an electric shock or faulty operation of equipment.
z
The cleaning and the fastening work can be done only after the power supply has been disconnected; otherwise there is a danger of electric shock.
z
Only after the power supply has been disconnected, can the communication signal cables and the cables of the expansion module or control unit be connected or removed. Otherwise there is a danger of equipment damage or faulty operation of equipment.
z
Do not disassemble the PLC. Otherwise it may destroy the inner electrical components.
z
Read through this manual carefully before operating the PLC. Safe and efficient operation of the product, such as program alternation, trial operation, start and stop, is only based on correct operation and maintenance.
z
Do not replace the button cell battery with power applied. If the battery replacement is indeed to be done with power applied, it shall always be carried out by adequately trained electric technical personnel wearing insulated gloves.
Notes for the product disposal Note the following when disposing the PLC: z
Explosive of the electrolytic capacity: The capacities on the circuit board may explode when burning.
z
Exhaust gas when burning: The main body of the PLC is plastic, and it may produce poisonous gas when burning.
z
Disposal of button cell battery: Classified collecting and disposing, and separating from the daily-life rubbish.
Follow the local environmental regulations to dispose the PLC or dispose it as industrial waste.
Contents Chapter 1 Preface ............................................................................................................................................................ 1 Chapter 2 Product Introduction......................................................................................................................................... 2 2.1
Outline................................................................................................................................................................ 2
2.2
Maximum Configuration ..................................................................................................................................... 2
2.3
Internal Memory Capacity Of User Program ...................................................................................................... 2
2.4
Resource Configuration Of System Soft-device ................................................................................................. 2
2.5 High-speed Input/Output Function...................................................................................................................... 3 2.6
Filter Function Of Input Port ............................................................................................................................... 3
2.7 Interrupt Source.................................................................................................................................................. 3 2.8 Subroutine Call................................................................................................................................................... 3 2.9 Reinforced Debugging Function ......................................................................................................................... 3 2.10
Support Online Modification ............................................................................................................................. 3
2.11
Multiple Password Protection Function ............................................................................................................ 4
2.12
Expansion Module............................................................................................................................................ 4
2.13 RUN And STOP Control................................................................................................................................... 4 2.14
User Program Developing And Debugging ...................................................................................................... 4
2.15
Communication And Networking ...................................................................................................................... 4
Chapter 3 Installation........................................................................................................................................................ 5 3.1
Notes For Installation ......................................................................................................................................... 5
3.2
Requirements For Installation Position............................................................................................................... 5
3.3
Installation Method ............................................................................................................................................. 5
3.4
Installation Dimensions ...................................................................................................................................... 6
Chapter 4 Product Specifications ..................................................................................................................................... 8 4.1
Model Legend..................................................................................................................................................... 8
4.2 Product Model And Configuration....................................................................................................................... 8 4.2.1
Main Module ........................................................................................................................................... 8
4.2.2
I/O Expansion Module............................................................................................................................. 8
4.2.3 Special Function Module......................................................................................................................... 9 4.3 Product Size ....................................................................................................................................................... 9 4.4 Environmental Requirements ............................................................................................................................. 9 4.5 Electric Insulation Specifications ........................................................................................................................ 9 4.6
Reliability .......................................................................................................................................................... 10
4.7
Power Supply Specifications ............................................................................................................................ 10 4.7.1 Inner Power Supply Of Main Module .................................................................................................... 10 4.7.2 Use Of Each Circuit Output Power........................................................................................................ 10 4.7.3 Power Specifications Provided By Main Module To Expansion Module................................................ 11 4.7.4
Derating Design Of Power Supply Circuit ............................................................................................. 11
4.7.5 Power Consumption Of Expansion Module........................................................................................... 12 4.7.6 Power Capacity Calculation In Expansion Connection.......................................................................... 12 4.8
Programming Tool Of User Program................................................................................................................ 12
Chapter 5 Input Characteristic ........................................................................................................................................ 13 5.1 User Ports Of Main Module .............................................................................................................................. 13 5.2 Input Port Characteristic And Signal Specification ........................................................................................... 14 5.3
Inner Equivalent Circuit Of Input Port ............................................................................................................... 15
5.4
Input Connection Of High-speed Counter ........................................................................................................ 16
5.5 Interrupt Input Connection................................................................................................................................ 17 5.6 Input Signal Status Indication ........................................................................................................................... 17 5.7
Analog Potentiometer And Application ............................................................................................................. 17
5.8
Example Of Input Connection .......................................................................................................................... 17
Chapter 6 Output Characteristic ..................................................................................................................................... 19 6.1 Output Port Application .................................................................................................................................... 19 6.2 Electric Specifications Of Output Port .............................................................................................................. 19 6.3 Output Port Connection.................................................................................................................................... 20 6.4
Output Port Status Indication............................................................................................................................ 22
6.5
Example Of Output Connection........................................................................................................................ 22
Chapter 7 Expansion Module ......................................................................................................................................... 23 7.1 Model ............................................................................................................................................................... 23 7.2
Expansion Busbar Connection ......................................................................................................................... 23
7.3
Expansion Module Addressing ......................................................................................................................... 23 7.3.1
I/O Point Addressing Number Principle................................................................................................. 24
7.3.2 Special Function Module Addressing Number Principle........................................................................ 24 Chapter 8 Communication And Networking.................................................................................................................... 25 8.1 Communication Port......................................................................................................................................... 25 8.2
Programming Environment............................................................................................................................... 26
8.3 Programming Cable ......................................................................................................................................... 26 Chapter 9 Cable Specification And Wiring...................................................................................................................... 27 9.1 Connecting Power Supply Cable...................................................................................................................... 27 9.2 Connecting Ground Cable ................................................................................................................................ 27 9.3 Connecting Common Port ................................................................................................................................ 28 9.4 Cable Specification........................................................................................................................................... 28 Chapter 10 First Operation And Maintenance ................................................................................................................ 29 10.1 Notes For Application ..................................................................................................................................... 29 10.2
Check Before Power On................................................................................................................................. 29
10.3 Startup............................................................................................................................................................ 29 10.4
RUN/STOP Switchover .................................................................................................................................. 29 10.4.1 How To Startup (STOP → RUN) ....................................................................................................... 30
10.4.2 How To Stop (RUN → STOP) ........................................................................................................... 30 10.5 Routine Maintenance ..................................................................................................................................... 30 Chapter 11 Troubleshooting ........................................................................................................................................... 32 Chapter 12 Instruction List.............................................................................................................................................. 33 Chapter 13 Special Register........................................................................................................................................... 38 13.1
Special Intermediate Register ........................................................................................................................ 38
13.2 Special Data Register..................................................................................................................................... 42
Chapter 1 Preface
1
Chapter 1 Preface Thank you for using EC20 series Programmable Logic Controller (PLC) made by Emerson Network Power Co., Ltd. This book contains text, diagrams and explanations that will guide the reader in the correct installation and operation of the EC20 series PLC and should be read and understood before attempting to install or use the product. The book describes the hardware, features and applications of the EC20 series PLC, also includes the options introduction, troubleshooting guide and instruction quick reference. For the information about how to setup an EC20 programming system and the customer programming application, please refer to ControlStar Programming Software User Manual or EC20 series PLC Programming Manual printed by Emerson Network Power Co., Ltd. For ordering the above user manuals, contact your Emerson distributor or sales office. This manual is designed for the engineer who is studying, programming, installing, or servicing the EC20 series PLC. Definitions of specific terms PLC: Programmable Logic Controller Main module: Refer to basic module or CPU module; it is the basic unit of the PLC. It includes master CPU, I/O ports and power supply. Expansion module: Generally refer to the modules except for the main module. I/O expansion module: The expansion module for the digital signal input/output. Special function module: Other function expansion modules except for the I/O expansion module, such as analog signal input/output module, and busbar module. Points: The sum of channel number of the input/output digital signal. Digital signal: Refer to the input/output signals that only have two states: “ON” and “OFF”. Analog signal: Continuously changed electric signal, such as 4~20mA output signal of pressure transmitter. Unipolar signal: Generally refer to the continuously changed signal with positive polarity. Bipolar signal: Generally refer to the continuously changed signal, which may be positive polarity or negative polarity. High-speed pulse: Refer to the square-wave signal with higher frequency. Counter: Refer to the counter whose counting value increases or decreases by per pulse input according to the increasing/decreasing control signal. Two-phase counter: refer to the counter that has two-pulse input ports, one is for counting up, and the other is for counting down. AB-phase counter: refer to the counter that has two input ports of quadrature phase pulse, and counts up or down according to the frequencies and phase differences of the two signals.
EC20 Series PLC User Manual
2
Chapter 2 Product Introduction
Chapter 2 Product Introduction 2.1
Outline The outline of EC20 main module is shown in Figure 2-1.
1
2
4
3
15 14 13
5 6 7 8 12
11 Figure 2-1
10
9
Outline of EC20 main module
The name and function of the components in the figure are as follows: 1. The installation position of a button cell battery (CR2032 lithium battery) for data backup. 2. Power supply input ports 3. Signal input ports 4. Input signal status LEDs 5. 26pin busbar socket, used for connecting the expansion module 6. Output signal status LEDs 7. Fix screws, used for tightening the top/bottom cover of the PLC 8. Mounting holes, used for installing screws 9. Locking device of 35mm DIN, used for DIN rail installation mode. 10. Signal output ports 11. System operation status LEDs 12. Communication port COM1, providing RS485 and RS232 at the same time 13. Communication port COM0, RS232, Mini DIN8 socket 14. System operation control switch, with three positions: ON, TM and OFF. 15. Analog potentiometers (two)
2.2
Maximum Configuration The main module and the I/O expansion modules can achieve the most 512 logic points (256 in/256 out maximum). And eight special function modules can be expanded at most.
2.3
Internal Memory Capacity Of User Program The user program is 8K words (16K byte) at most and supports 8,000 data blocks of D register.
2.4
Resource Configuration Of System Soft-device Component X
Name Input relay
Quantity 256
Serial No.
Note
X000~X377
The soft-device numbering is octal code The soft-device numbering is octal code
Y
Output relay
256
Y000~Y377
M
Auxiliary relay
2000
M0~M1999
LM
Local relay
64
LM0~LM63
EC20 Series PLC User Manual
Chapter 2 Product Introduction Component SM
2.5
Name Special auxiliary relay
Note
State relay
992
S0~ S991
T
Timer
256
T0~T255
100ms precision: T0~T209 10ms precision: T210~T251 1ms precision: T252~T255
C
Counter
256
C0~C255
16 bit common increasing counter: C0~C199 32 bit common decreasing counter: C200~C235 32 bit high-speed counter: C236~C255
D
Data register
8000
V
Local data register
64
V0~V63
Z
Indexed addressing register
16
Z0~Z15
SD
Special data register
256
SD0~SD255
D0~D7999
High-speed Input/Output Function High-speed port type
Input/output mode
X0, X1
Input
High-speed pulse count
Single input: 50KHz; X0~X5 input at the same time: frequency sum is 80KHz
X2~X5
Input
High-speed pulse count
Single input: 10KHz
Y0, Y1 (only suitable for transistor output)
Output
Max. frequency of input/output signal
High-speed pulse output Two ports output independently:
100KHz
Filter Function Of Input Port Function
2.7
Serial No. SM0~SM255
S
High-speed port name
2.6
Quantity 256
Description
Digital filter function
X0~X17 provide digital filter function, and filter time is within 0~60mS, set by user’s program
Hardware filter function
Other X input ports
Interrupt Source Provide eight external interrupt inputs, the interrupt edge can be set by users and is corresponding to X0~X7 ports; six high-speed counter interrupts; three inner timing interrupt sources.
2.8
Subroutine Call At most 64 subroutines and 6-level subroutine nesting can be used. Support local variables and variable-alias, and every subroutine can provide 16 parameters to be called at most.
2.9
Reinforced Debugging Function Provide register-forced function, convenient for debugging and analyzing the user program, improving debugging efficient. Permit the most 128 bit-registers and 16 word-registers.
2.10
Support Online Modification Users can modify the program online during operation, which is greatly convenient for modifying and upgrading the user program in important production situation.
EC20 Series PLC User Manual
3
4
2.11
Chapter 2 Product Introduction
Multiple Password Protection Function The product provides three password authorities, which is convenient for user program access control and protecting the intelligence property.
2.12
Expansion Module The expansion module such as I/O module, analog signal input/output module, network expansion module, and position control module can be connected to the PLC main module. Every module is address allocation automatically and identification automatically.
2.13
RUN And STOP Control RUN or STOP of the EC20 can be controlled through the following methods: the RUN/STOP switch, ControlStar program system, communication port (i.e. Modbus), and standard input ports X0~X7, which are convenient for controlling system operation
2.14
User Program Developing And Debugging Provide the integrated ControlStar program system compatible with IEC61131-3 standard, and uses ladder diagram, instruction list, and sequential function diagram to program. The unit has such functions as monitoring, debugging, and modifying on-line. The program system also provides strong instruction guide and on-line help.
2.15
Communication And Networking The main module has two asynchronism serial communication ports (COM1 provides RS232 and RS485 level), for communication with personnel computer, HMI and other equipment; and the main module has an inner standard Modbus protocol to compose 1:N network; and supports freedom protocol. Provide Profibus module to compose the Profibus network.
EC20 Series PLC User Manual
Chapter 3 Installation
5
Chapter 3 Installation 3.1
Notes For Installation The PLC is designed to be used in the environments meeting with standard II installation ambient, and Class 2 pollution. So the unit should be installed in such environment free of dust, conductive dust, corrosive or flammable gas, excessive heat, moisture or rain; Besides, shocks and vibrations will also affect the reliability of the PLC and shorten its service life, and should therefore be avoided. Usually, the user should mount the PLC and the associated switches, contactors to the inside wall of the electric cabinet and keep adequate natural convection. If the ambient temperature is a little high, or a heat generating equipment is nearby, then a forced convection device should be installed on the top or the side of the cabinet to prevent the overheat of the unit. Take special care not to allow metal debris and wire lead to fall inside the vent of the PLC during the screw hole processing and wiring. Otherwise there is a danger of fire, damage or faulty operation of equipment. Once the installation of the new PLC is complete, remove everything on the surface of the vent, including packing goods such as protective paper. Otherwise the poor ventilation during the operation may result in fire, damage or faulty operation of equipment. Do not wire, inset or pull out the cable plug with power applied. Otherwise there is a danger of electric shock or circuit damage. Installation and wiring must be firm and reliable; bad contact may result in faulty operation of equipment.
3.2
Requirements For Installation Position To prevent a rise in temperature, mount the PLC up and down to the backboard of the cabinet horizontally. Never mount them to the floor or ceiling of an enclosure or other directions, as shown in the Figure 3-1. You must provide a clearance of at least 15 mm, both above and below the units, for proper cooling. No heat generating equipment
should exist around the PLC.
Figure 3-1
3.3
Requirements for installation position
Installation Method Generally you can mount the PLC onto a standard rail (DIN) with 35mm width. Follow these steps: 1. Fix the DIN rail to the backboard; 2. Pull out the clip (located on the bottom of the PLC) and hook the back of the PLC onto the rail. 3. Snap the clip closed, carefully checking to ensure that the clip has fastened the PLC securely onto the rail. 4. At last, install two DIN rail stops at the two sides of the PLC to avoid slippage around. Other EC20 series modules can be mounted using the same procedures.
EC20 Series PLC User Manual
6
Chapter 3 Installation DIN rail stop
DIN rail stop
Pull out the Clip of DIN rail
Figure 3-2
DIN rail with 35mm width
Snap the clip of the DIN rail
Installing a PLC onto a standard rail
Under the conditions with great impact, you should mount the PLC on a panel using the screw installation. Using four fix screws through the four Φ4 mounting holes on the enclosure of the PLC (while EC20-2012BR/BT has only two Φ4 fix screws) to fix the PLC on the back panel of the electric cabinet, as shown in the Figure 3-3. M3 fix screw
4 mounting holes Figure 3-2
3.4
M3 fix screw
Installing a PLC onto a panel with fix screws
Installation Dimensions 1. The dimensions for the outline and mounting holes of EC20-2012BR and EC20-2012BT are shown in the Figure 3-4:
DIN rail (35mm)
Figure 3-4
Dimensions of outline and mounting holes of EC20-2012BR and EC20-2012BT
2. The dimensions for the outline and mounting holes of EC20-3232BR and EC20-3232BT are shown in the Figure 3-5:
Figure 3-5
Dimensions of outline and mounting holes of EC20-3232BR and EC20-3232BT
3. The dimensions for the outline and mounting holes of EC20-0808ER are shown in the Figure 3-6. And the dimensions for the outline and mounting holes of the analog signal expansion module such as EC20-4AD, EC20-4DA, EC20-4AM, and EC20-4TC are the same with that of EC20-0808ER.
EC20 Series PLC User Manual
Chapter 3 Installation
Figure 3-6
Dimensions of outline and mounting holes of EC20-0808ER and the analog signal expansion module
EC20 Series PLC User Manual
7
8
Chapter 4 Product Specifications
Chapter 4 Product Specifications 4.1
Model Legend EC 2 0 - 20 12 B R D Addition (A: AC 220V input power) D: DC 24V input power N: No power Output mode (R: relay; T: transistors) Module type (B: main module; E: expansion module) Output points Input points Version Series No. (1:micro-type; 2:minitype; 3:medium-sized; 4:large-sized Emerson PLC Figure 4-1
4.2
Product Model And Configuration
4.2.1
Main Module Table 4-1
Model Legend of PLC
Model and I/O configuration of EC20 series PLC,
Model
Power voltage Vac
Input / output points
Input signal voltage
Output type
Input port/ Output port/ Interrupt/ common port common port pulse input
Pulse output
EC20-2012BRA
90~264
20/12
DC24V
Relay
20/1
12/5
Yes
No
EC20-2012BTA
90~264
20/12
DC24V
Transistor
20/1
12/5
Yes
Yes
EC20-3232BRA
90~264
32/32
DC24V
Relay
32/1(2)☆
32/6
Yes
No
EC20-3232BTA
90~264
32/32
DC24V
Transistor
32/1(2)☆
32/6
Yes
Yes
☆ “ 32/1(2)” in the table: Represent only one common port in logic, but two common ports in structure, and the two are connected inside the PLC.
4.2.2
I/O Expansion Module Table 4-2
I/O expansion module and configuration of EC20 series PLC
Model
Power Supply Vac
Input/output points
Output type
EC20-0808ERN
-
8/8
Relay
No
EC20-0808ETN
-
8/8
Transistor
No
EC20-1616ERA
220Vac
16/16
Relay
Yes
EC20-1616ETA
220Vac
16/16
Transistor
Yes
EC20-1600ENN
-
16/00
-
No
EC20-0016ERN
-
00/16
Relay
No
EC20-0016ETN
-
00/16
Transistor
No
EC20 Series PLC User Manual
Inner power supply
Chapter 4 Product Specifications
4.2.3
Special Function Module Table 4-3
Special function module of EC20 series
Model
Function
EC20-4AD
4.3
9
4-channel analog signal input module
EC20-4DA
4-channel analog signal output module
EC20-4TC
4-channel thermocouple temperature input module
EC20-4AM
2-channel analog signal input module, 2-channel analog signal output module
Product Size The main modules of EC20 series PLC have the same height and width, but their lengths are related to the I/O ports. The size of each module is listed in Table 4-4. Table 4-4
4.4
Model
Length (mm)
Width (mm)
Height (mm)
Net weight
EC20-2012BR
158
90
82
680g
EC20-2012BT
158
90
82
680g
EC20-3232BR
227
90
82
950g
EC20-3232BT
227
90
82
880g
EC20-0808ER, 4AD, 4DA, 4AM, 4TC
58
90
82
240g
Environmental Requirements Table 4-5
Requirements of operation, storage, and transport environments of EC20 series PLC
Environmental parameters Type
Parameter
Climate
Temperature Humidity Air pressure**
Mechanical stress
Sinusoidal vibration Random vibration
Impact Drop
4.5
Product size
Unit
Environmental conditions for operation
Environmental conditions for transport
Environmental conditions for storage
Low temperature
°C
-5
-40
-40
High temperature
°C
55
70
70
Relative humidity
%
95 (30 ± 2°C)
95 (40 ± 2°C)
Low pressure
kPa
70
70
70 106
/
High pressure
kPa
106
106
Bit shift
mm
3.5 (5-9HZ)
/
acceleration
M/s2
10 (9-150HZ)
/
acceleration spectra density
m2/s3 (dB/Oct)
/
1.92 (5-20Hz) (20-200Hz)
Frequency range
Hz
/
5-200
/
Vibration direction
/
X/Y/Z
/
Type
/
Half-sine wave
/
/ / -3db
/
acceleration
m/s2
/
180
/
Drop height
m
/
1
/
Electric Insulation Specifications Table 4-6
Electric insulation specifications of EC20 series PLC
Type Insulation resistance
Value
AC input to case
≥ 5%106Ω
AC input to DC output
≥ 5%106Ω
DC output to case
≥ 5%106Ω
Test conditions Ambient temperature: 25 ± 5°C; relative humidity 90% (no condensing); test voltage: 500Vdc
AC input to case (PG port) AC input to the port between the user input and output Insulation voltage
AC input to expansion busbar User output (relay board) to expansion busbar User input to user output (relay)
Capable of withstanding 2830Vac/50Hz AC voltage (or equivalent DC voltage) 1 minute, with leakage current ñ30mA, and no breakdown or flashover
Between user output ports (relay board)
EC20 Series PLC User Manual
10
Chapter 4 Product Specifications Type Insulation voltage
4.6
Value
Test conditions
The insulation resistance and voltage of other circuits are designed according to the requirements of an extra-low voltage circuit
Reliability Table 4-7 Output type
MTBF of EC20 series PLC
Time
Conditions
200,000 hours Fix on the floor , mechanical stress is almost close to zero, with temperature and humidity control
Relay
100,000 hours Fix on the floor , mechanical stress is almost close to zero, without temperature and humidity control 300,000 hours Fix on the floor , mechanical stress is almost close to zero, with temperature and humidity control
Transistor
150,000 hours Fix on the floor , mechanical stress is almost close to zero, without temperature and humidity control
For the PLC with relay output, the life of its contactors is related to the load type and load capacity, as listed in Table 4-8. Table 4-8 Load capacity
Action frequency
220Vac, 15VA, inductive load
1sec. ON / 1sec. OFF
3,200,000 times
220Vac, 30VA, inductive load
1sec. ON / 1sec. OFF
1,200,000 times
220Vac, 60VA, inductive load
1sec. ON / 1sec. OFF
300,000 times
4.7
Power Supply Specifications
4.7.1
Inner Power Supply Of Main Module Table 4-9 Item
Unit
Life-span of contactors
Power supply circuit character of EC20 series PLCs
Min.
Typ.
Max.
Note
Input voltage
Vac
90
220
264
Normal start and operating range
Limiting input voltage
Vac
85
-
280
Operating at 280V for 3 hours and not damaged Each circuit can power 70% rated load at 85-100Vac, and power 55% rated load at 264-280Vac
Input current Output voltage Output rated current
4.7.2
Use life of EC20 series output relay
5V/GND
A
/
/
1.5
90Vac input, full load output
V
4.75
5
5.25
Output1
24V/GND
V
21.6
24
26.4
Output2
24V/COM
V
21.6
24
26.4
Output3
5V/GND
mA
1000
24V/GND
mA
650
24V/COM
mA
600
The capacity is the sum of the main module inner consumption and the expansion module load. The maximum output power is 35W, which is the sum of each circuit output with full load. The module is natural cooling
Use Of Each Circuit Output Power 1. Output1 (5V/GND): Output1 is the working power of the PLC main module logic circuit, and provides power supply to the expansion module logic circuit through the expansion port of the module at the same time. And this power will not be used for the expansion module with self-carried power source. 2. Output2 (24V/GND): Output2 is the working power of the PLC main module relay output circuit, and provides power supply to the expansion module relay output circuit through the expansion port of the module at the same time. Output1 and output2 share the common ground. And this power will not be used for the expansion module with self-carried power source. 3. Output3 (24V/COM): Output3 is the 24V power supply, which is provided to users by the PLC main module. Also it can be used as an auxiliary power to other user circuits, sensors or expansion modules through the “24V” and “COM” ports of the main module. Output3 is electrical isolated with Output1 and Output2.
EC20 Series PLC User Manual
Chapter 4 Product Specifications
4.7.3
11
Power Specifications Provided By Main Module To Expansion Module Table 4-10
Power capacity consumption and load current provided
Logic circuit power supply Model
5V/GND Inner consumption*
Auxiliary power supply output
24V/GND
Capacity provided*
Inner consumption
24V/COM
Capacity provided
EC20-2012BR
250mA
750 mA
70 mA
580 mA
EC20-2012BT
400 mA
600 mA
0
650 mA
EC20-3232BR
480 mA
520 mA
240 mA
410 mA
EC20-3232BT
650 mA
350 mA
0
650 mA
Inner consumption
Capacity provided
140mA
460 mA
240mA
360 mA
*Explanation: The current of “Inner consumption” in Table 4-10 is the average current consumed when the module inner circuit works. Users cannot change it directly. The current of “capacity provided” in Table 4-10 is the part capacity of the main module that can be used for the external control module. The data listed in Table 4-10 is under the stable ambient condition with 25°C. If input voltage is out of rated voltage range or the working temperature exceeds +50°C, users should consider the derating design, which is mainly obtained by decreasing the value of “capacity provided”, to ensure the reliable operation of the PLC.
4.7.4
Derating Design Of Power Supply Circuit 1. Relation between power supply output capacity derating and power supply input voltage When the input voltage of the PLC is beyond the rated voltage range, users should consider decreasing the main module’s output power to the expansion module. The derating relation is shown in Figure 4-2. Power load %
Input voltage Vac 85 Vac
Figure 4-2
264 Vac
100 Vac
280 Vac
Derating curves of power supply output capacity and power supply input voltage
2. Power output capacity derating vs. work temperature relationship When the work temperature is higher than the upper limit of the specification, the power capacity provided (including 5V/24V/GND and 24V/COM) by the main module to the expansion module must be derating. The derating relation is shown in Figure 4-3. Power load %
Operation ambient temperature°C -5°C
Figure 4-3
50°C
55°C
Derating curve between power output capacity and work temperature
EC20 Series PLC User Manual
12
4.7.5
Chapter 4 Product Specifications
Power Consumption Of Expansion Module Table 4-11
Power consumption of each expansion module Max. current consumption
Model
5V/GND
24V/GND
EC20-0808ER
30mA
50mA
24V/COM 50mA
EC20-0808ET
80mA
0
50mA
EC20-4AD
50mA
0
25mA
EC20-4DA
50mA
0
120mA ☆
EC20-4AM
50mA
0
90mA ☆
EC20-4TC
50mA
0
25mA
☆: Refer to the power consumption when the analog output channel port connects with the output. If the current output port (0~20mA) is not used, the current can be decreased to 50mA.
4.7.6
Power Capacity Calculation In Expansion Connection Before the PLC connects with an expansion module, users should calculate the current sum of each power supply of the expansion module, and ensure the current sum is less than the output current provided by the corresponding power supply of the main module to avoids the over loading of the main module power supply. Example 1: the main module is EC20-2012BR, at 25°C ambient temperature, two EC20-0808ET, two EC20-4AD, one EC20-4DA and one EC20-4TC shall be connected to, verifying the feasibility. Checking computations as following: Power circuit
Current provided by the main module
Actual consumed current
5V/GND
750mA
(80×2+50×2+50+50) = 360mA
conclusion Pass
24V/GND
580mA
(0×2+0×2+0+0) =0 mA
Pass
24V/COM
460mA
(50×2+25×2+110+25) = 285mA
Pass
It is obvious that the total power consumption of above expansion module is less than the permission load of the main module, and the designing scheme is feasible. Example 2: the main module is EC20-3232BT, at 25°C ambient temperature, three EC20-0808ET, two EC20-4AD, one EC20-4DA shall be connected to, using 20mA output port and one EC20-4TC. Checking computations as following: Power circuit
Current provided by the main module
Actual consumed current
conclusion
5V/GND
350mA
(80×3+50×2+50+50)=440mA
Un-passed
24V/GND
650mA
(50×3+0×2+0+0)=150mA
Pass
24V/COM
360mA
(50×3+25×2+120+25)=345mA
Pass
The sum of the 5V/GND power consumption of the expansion module is 440mA, it is larger than 350mA which is the upper limit of 5V power supply; although the power consumption of 24V/GND and 24V/COM is less than the permitted current of the main module, the designing scheme is unfeasible. The solution to solve the insufficient of power supply capacity is to select the expansion module with self-carried power source. It can power by itself, also its outputs of 5Vdc/GND, 24Vdc/GND, and 24Vdc/COM can power to the expansion module added later.
4.8
Programming Tool Of User Program ControlStar programming system provides the programming, up/down-loading, debugging and monitoring the user program of the EC20 series PLC. The system also provides abundant help information, which can use ladder diagram, instruction list and sequence functional diagram to program.
EC20 Series PLC User Manual
Chapter 5 Input Characteristic
13
Chapter 5 Input Characteristic 5.1
User Ports Of Main Module The outline and the ports of EC20-2012BR and EC20-2012BT are the same. Their port wirings are shown in Figure 5-1: PG
COM X0 L
X2 X1
N
X4 X3
X6 X10 X12 X14 X16 X20 X22 X5
X7 X11 X13 X15 X17 X21 X23
Wiring of EC20-2012BR and EC20-2012BT
+24V
Y0
Y2
Y4
Y6
COM COM COM COM Y5 Y3 0 1 2 3
COM
Figure 5-1
Y1
Y10 Y12 Y7
COM Y11 Y13 4
The outline and the port of EC20-2012BR and EC20-2012BT
The pin definitions of EC20-2012BR and EC20-2012BT are listed in Table 5-1: Table 5-1
Pin functions of EC20-2012BR and EC20-2012BT
Pin L/N
Function
Note
220Vac AC power input port, L is live line, N is neutral line
PG
Earth port
●
Null port, used for isolation and not wiring
X0~X23
User input signal ports, used together with COM can produce input signal
COM
Common port, it is the negative pole of the +24Vdc auxiliary power and the common port of input as well. Two COMs connect inside the PLC
+24V
The auxiliary power to user external equipment , used together with COM
Y0, COM0
Control output port, group 0
Y1, COM1
Control output port, group 1
Y2, Y3, COM2
Control output port, group 2
Y4~Y7, COM3
Control output port, group 3
Y10~Y13, COM4
Control output port, group 4
The COMx (COM0 ~ COM4) of each output group are electrical isolated one another
The outline, port layout and function definition of EC20-3232BR and EC20-3232BT are the same. The port layout is shown in Figure 5-2:
EC20 Series PLC User Manual
14
Chapter 5 Input Characteristic PG
COM COM X0 L
X2
+24V X1
N
X4 X3
X6 X10 X12 X14 X16 X20 X5
X22 X24 X26 X30 X32 X34 X36
X7 X11 X13 X15 X17 X21
X23 X25 X27 X31 X33 X35 X37
Wiring of EC20-3232BR and EC20-3232BT
Y0
COM 2 Y3
Y1
COM COM Y2 0 1
Y5 Y4
Y7
Y11 Y13 Y15 Y17
Y23 Y25 Y27 Y31 Y33 Y35 Y37
COM Y6 COM Y10 Y12 Y14 Y16 Y20 Y22 4 3
Figure 5-2
Y24 Y26 Y30 Y32 Y34 Y36
COM 5
Outline and port layout of EC20-3232BR and EC20-3232BT Table 5-2
Pin
Pin definition
Function
L/N
5.2
Y21
Note
220Vac AC power input port, L is live line, N is neutral line
PG
Earth port
●
Null port, used for isolation and not wiring
X0~X37
User input signal ports, used together with COM can produce input signal
COM
Common port, it is the negative pole of the +24Vdc auxiliary power and the common port of input as well. Two COMs connect inside the PLC.
+24V
The auxiliary power to user external equipment , used together with COM.
Y0, COM0
Control output port, group 0
Y1, COM1
Control output port, group 1
Y2~Y7, COM2
Control output port, group 2
Y10~Y17, COM3
Control output port, group 3
Y20~Y27, COM4
Control output port, group 4
Y30~Y37, COM5
Control output port, group 5
The COMx (COM0~COM4) of each output group are electrical isolated one aother.
Input Port Characteristic And Signal Specification Table 5-3 Item Signal input mode
Input port characteristic and signal specification High-speed input port X0~X7
General input port
Leak mode, users only need to connect dry contact with Xn and COM ports.
Electric parameters Electric parameters
Test voltage
24Vdc
Input impedance
3.3k
Input ON
External circuit resistance < 400Ω
Input OFF
External circuit resistance > 24kΩ
Filtering function
Digital filter
X0~X17 have digital filtering function, the filtering time can be set within 0~60ms
Hardware filter
Except for X0~X17, other I/O ports are hardware filtering, filtering time is about 8mS.
High-speed function
Common port
4.3k
X0~X7 have high-speed counting, interrupt, and pulse catching function. The highest counting frequency of X0 and X1 port is high up to 50KHz The highest counting frequency of X2~X5 port is high up to 10KHz
Input
Only has one common port: COM
Output
Have multi isolated common ports according to different point configuration.
EC20 Series PLC User Manual
Chapter 5 Input Characteristic
Inner Equivalent Circuit Of Input Port There is a user switch status detecting power supply (24Vdc). Users only need to connect to the switching signal of the dry contact. If the output signal of active transistor sensor is connected to, an OC output signal is needed. Figure 5-3 shows the signal input and inner equivalent circuit of the PLC, and user’s circuit connects with PLC inner circuit through the connecting port. Inner equivalent circuit of PLC main module
User signal wiring 24V+ 24V+
Sensor
24V -
24Vdc auxiliary power supply
Working power for inner logic circuit 24V/5V/GNG
X0 Logic processing circuit
Various signal input equipment
COM
X1
X2
Xn
Figure 5-3
Inner equivalent input circuit of the main module (upon delivery)
As shown in Figure 5-3, the external signal input is “a SINK input”. You may need “a SOURCE input” in some special application, and you can change the soldering of the three jumper terminals of JP0, JP1, and jp2 on the interface board inside the PLC to reset the input mode, according to the screen-printing on the board (“ ” represents soldering; “×”represents disconnection). As shown in Table 5-4: Table 5-4
Screen print illustration JP0
Source input mode
JP1
JP2
%
%
%
Drain input mode (default setting)
The equivalent input circuit changed to the SOURCE input mode is as Figure 5-4: User signal wiring
Inner equivalent circuit of SOURCE input mode of the main module 24V+ 24V+
24Vdc auxiliary power supply
24V-
Working power for inner logic circuit 24V/5V/GND
X0
X1
X2
Logic processing circuit
Various signal input equipment
COM
For equipment with self-carried power source (24Vdc)
5.3
15
Xn
Figure 5-4
inner equivalent circuit of SOURCE input mode of the main module
EC20 Series PLC User Manual
16
Chapter 5 Input Characteristic Note: in the main module, all the input ports can but use the same input mode (SOURCE input mode or SINK input mode); if you have any requirement, please contact your supplier and ask for the technical support before purchasing the product. To avoid damage, you’d better not change the circuit by yourself. The inner equivalent power supply and input signal connection of the I/O expansion module are shown in Figure 5-5: Provided by extension cable
User signal wiring
Internal equivalent circuit of the PLC extension module
To 24V+ of main module
24V+
Power supply of logic circuit : 24V/5V/GND
To COM of main module Sensor
Logic circuit
Signal input equipment
X0
X1
X2
Xn
Figure 5-5
5.4
Inner equivalent input circuit of the I/O expansion module
Input Connection Of High-speed Counter Table 5-5
the counter connection method and characteristic realized by X0~X7
Counter X0 X000
X001
X002
X003
X004
X005
X006 X007
Input point Counter C236 Up/down Counter C237
50 Up / down
Counter C238 Single-phase single-end count input mode
50 Up / down
Counter C239
Up / down
Counter C240
Up / down
Counter C241
Up / down
Counter C242 Up/down Counter C244 Up/down
Up / down
Up / down
Up / down
Up / down
Reset
Counter C245 Counter C246
Up
Down
Single-phase Counter C247 up/down Counter C248 count input Counter C249
Up
Down
Reset
Up
Down
Reset
Counter C251
Phase A
Phase B
Counter C252
Phase A
Phase B
Reset
Phase A
Phase B
Reset
Reset Reset 50 Up
Counter C250
Down
Reset
10
Start Up
Down
Reset
Start 30
Counter C253 Counter C254
10
Reset
Counter C243
Two-phase up/down count input
Max. Fre. (KHz)
Phase A
Counter C255
Phase B
Reset
5
Start Phase A
Among which: Phase A: phase-A input port of the two-phase counter; Phase B: phase-B input port of the two-phase counter.
EC20 Series PLC User Manual
Phase B
Reset
Start
Chapter 5 Input Characteristic
5.5
17
Interrupt Input Connection For the system that responds promptly to the input signal, it can use the interrupt to process the signals. The input ports of X0~X7 have interrupt function and corresponds to the eight external interrupt sources. If the input port is used as interrupt process mode, the corresponding interrupt control identification should be enabled when programming and the corresponding interrupt routine should be programmed (for details, refer to Programming Reference Manual). When using interrupt, the digital filter function of corresponding X port will be disabled and the filter time of the corresponding port is set as zero automatically.
5.6
z
When used as high-speed count input or interrupt input, the corresponding input port should use shielding wire, and the shielding wire should connect to earth line (same as PG port) to improve the interference rejection.
z
Some counters require multiple X input ports to realize (for example, C242, C244, and C254 consist of 2, 3, 4 ports separately). After using this kind of counter, the used ports cannot be used as input of other counters and the common input mode.
z
The input port of the counter has the limitation for the maximum frequency. Beyond the limitation, it may result the incorrect counting or normal operation of the system. You should use the input port reasonable and select the suitable external sensors.
Input Signal Status Indication The input status LEDs indicate the status of the user input port. When the input port is closed (“ON” state), the LED is on; otherwise the LED is off. When the X0~X7 ports input high frequency signal, the flashing frequency of the LED may be lower than that of the actual input signal, which is for the convenience of the user to observe the characteristics of the port signals. Working status LEDs
Input terminal status LEDs
Output terminal status LEDs
Figure 5-6
5.7
Status LEDs of EC20 series main module
Analog Potentiometer And Application The analog potentiometer provides external channel for users setting inner soft-device, which is within 0~255 and read by user program. When adjusting the setting value, users can use a small Philips screwdriver to rotate the potentiometer clockwise to increase the setting value, and counter clockwise to decrease it. The maximum angle of rotation is 270°. Do not energize excess.
5.8
Example Of Input Connection Figure 5-7 shows an example: an EC20-3232BT connects with an EC20-0808ER to realize a simple position control. The high-speed counting ports of X0 and X1 detect the position signal from the encoder. The high-speed ports of X3~X7 connect to the travel switch which needs quickly response, other user signals can be distributed with input ports.
EC20 Series PLC User Manual
Chapter 5 Input Characteristic
Sensor
Z
AC-N
B
+24V
VGND
PG
Using terminal block connects to COM
A
18
AC-L
L
PG
N
24V
24V COM X0 X1 X2 X3 X4 X5
Switch power supply
X6 X7 X10 X11
X36 X37
Xn
Xm Xn Xm
+24V +5V GND
EC20-3232BT Figure 5-7
electric connection of EC20-3232BT and EC20-0808ER
EC20 Series PLC User Manual
0808ER
Chapter 6 Output Characteristic
19
Chapter 6 Output Characteristic 6.1
Output Port Application 1. The output type of EC20 series PLC can be divided into relay type and transistor type. Both types are greatly different in the operation parameters. You should distinguish the difference before using them to avoid the damage by the misuse. 2. To protect the contacts of the PLC output relay, when the drive DC circuit is inductive (such as relay coil), a fly-wheel diode shall be connected to the user circuit; when the drive AC circuit is inductive, a RC surge absorber shall parallel connect to the user circuit. In principle, the relay output port does not connect to the capacitive load. If there is necessary to use, its surge current must be less than the maximum current in the specification list (see Table 6-1). 3. The transistor output port should be within the limitation of the allowable maximum current (see Table 6-1) to ensure the thermal value of the output port is limited in the allowable range. If output currents of multiple transistors are bigger than 100mA, they should be distributed equally in the output ports. Distributed adjacent will affect the heat dissipation. 4. It is recommended the output points which are in the ON (conducting) state at one time shall not exceed 60% total output points for a long time. Table 6-1
Item Output action Common port Voltage Current Difference
Comparison of relay output and transistor output
Relay output
Transistor output
Dry contact output, output state is “ON” (conducting) , contacts are closed; output state is ”OFF”, contacts are open.
Divided into multiple groups, each group has a common port COMn, suitable for the control circuit with different potential, and all common ports are insulated one another. 220Vac; 24Vdc, no polarity requirement 24Vdc, polarity requirement Accord with output electric specifications (see Table 6-2) High drive voltage, high current Low drive current, high frequency, long lifespan To drive the load with low action frequency such To apply in the situation with high frequency and long life, such as Application as: intermediate relay, contactor coil, and LEDs control servoamplifier and electromagnet with frequent action
6.2
Electric Specifications Of Output Port Table 6-2
Item
Electric specifications of output port
Relay output port
Loop power supply voltage Below 250Vac, 30Vdc
Transistor output port 5~24 Vdc
Output current
Single point: 2.0A /250Vac The total current of the 8 points sharing COM port is less than 8A.
0.5A 24Vdc The total current of the 8 points sharing COM port is less than 2A.
Circuit insulation
mechanical insulation
Optical coupling insulation
Act indication
Relay output contacts closed, LED on
Optical coupling is driving, LED on
Leakage current at open circuit
-
Less than 0.1mA/30Vdc
Min. load
2mA/5Vdc
5mA (5~24Vdc)
EC20 Series PLC User Manual
20
Chapter 6 Output Characteristic
Max. output current
Item
Transistor output port
Resistive load
2A/1 point; 8A/4 points, using a COM 8A/8 points, using a COM
Y0, Y1: 0.3A/1 point; Others: 0.3A/1 point; 0.8A/4 point; 1.6A/8 point; Above 8 points, total current increases 0.1A at 1 point increase
Inductive load
220Vac，80VA
Y0, Y1: 7.2W/24Vdc Others: 12W/24Vdc
Electric light load
220Vac，100W
Y0, Y1: 0.9W/24Vdc Others: 1.5W/24Vdc
ON response time
20ms Max
OFF response time
20ms Max
Y0, Y1: 10uS ; Others: 0.5ms
Y0,Y1 max. output frequency
-
Each channel : 100KHz
Output common port
Y0-COM0; Y1-COM1; Y2, Y3-COM2; Y4~Y7-COM3; Every 8 ports use one common port after Y8, and all the common port are isolated one another.
Fuse protection
No
Output Port Connection The inner equivalent circuit of the output part of the relay output PLC is shown in Figure 6-1: Inner equivalent circuit of PLC 24Vdc power Working power of inner logic circuit
Y0
Output group o
COM0 Y1
Output group 1
COM1
Output drive circuit
Logic processing circuit
6.3
Relay output port
Y2
Y3
Output group 2 Y4
Y5 COM2
Figure 6-1
Inner equivalent circuit of output part of relay output PLC
Figure 6-1 shows, output ports are divided into multiple groups, and each group is electrical isolated from others. Output contacts of different group can connect to the different power loop. For the inductive load in AC loop, the external circuit should be RC transient voltage absorbing circuit; for the inductive load in DC loop, it should consider to add a fly-wheel diode. As shown in Figure 6-2:
EC20 Series PLC User Manual
Chapter 6 Output Characteristic 24V +
21
24V -
Y7 Inductive load
Fly-wheel diode
24V + Y1
1N4004
24V -
Inductive load
Fly-wheel diode 1N4004
AC - N
AC - L Y11 Inductive load
R Figure 6-2
C
R=200Ω, 2W C=0.022uF , 250Vav
Protective circuit of PLC output contact
The inner equivalent circuit of the output part of the transistor output PLC is shown in Figure 6-3. We can see that, output ports are divided into multiple groups, and each group is electrical isolated from others. Output contacts of different group can connect to the different power loop. Transistor output can but be used in DC 24Vdc load circuit, and you should pay attention to the polarity of the power supply. When driving the inductive load, it should consider adding a fly-wheel diode. Inner equivalent circuit of PLC 5Vdc power Working power of inner logic circuit
Y0
Output group 0 COM0 Y1
Output group 1
Y2
Output drive circuit
Logic processing circuit
COM1
Y3
Y4
Output group 2
Y5 COM2
Figure 6-3
Inner equivalent circuit of output part of transistor output PLC
EC20 Series PLC User Manual
22
6.4
Chapter 6 Output Characteristic
Output Port Status Indication The status of the control output port is indicated by the output status LEDs. When the output port is closed (ON) state (the status between Yn and COMn is closed), the LED is on; otherwise the LED is off. When the Y0 and Y1 port of the transistor output PLC output high frequency signal, the flashing frequency of the LED may be lower than the actual output signal frequency, which is convenient for user observation.
6.5
Example Of Output Connection Figure 6-4 shows the connection between one EC20-3232BR and one EC20-0808ER, different output group can connect to the different signal voltage loop. Some output group (i.e. Y0-COM0) can connect to +24Vdc circuit and be powered by 24V/COM of EC20 PLC. Some output group (i.e. Y1-COM1) can connect to +5Vdc low voltage signal circuit. Other output groups (i.e. Y2~Y7) can connect to 220Vac signal circuit. That is to say, different output group can work at different voltage level. AC-N AC-L
L PG
N
24V
24V COM X0
Switch power supply
Y0 COM0
Y1 COM1
X1 X2 X3
+24V +5V GND
X36 X37
X4
X0
X1
X7
0808ER EC20-3232BR
Y2 Y3 Y4 Y5
Y6 Y7 COM2
Y30 Y31 Y32 Y33
COM5
Y0 Y1 Y2
COM
AC-L A B
A B
A B
A B
A B
A B
A B
A B
A B
A B
A B
A B
A B
+24V
AC-N
+5V
Various low-voltage signal circuit Figure 6-4
220Vac control load circuit
Using terminal block connects to COM
Electrical connection example of EC20-3232BR and EC20-0808ER
EC20 Series PLC User Manual
Chapter 7 Expansion Module
23
Chapter 7 Expansion Module 7.1
Model The expansion module is used to increase the point configuration of the main module, or to realize expansion part with special function. It must use together with the main module. At present, expansion modules provided by EC20 series are shown in Table 7-1. Table 7-1
Type I/O expansion module
Model EC20-0808ERN EC20-0808ETN EC20-4AD EC20-4DA Special module EC20-4AM EC20-4TC
7.2
Expansion module provided by EC20 series
Function Digital signal 8-channel input, 8-channel relay output Digital signal 8-channel input, 8-channel transistor output 4-channel analog signal input 4-channel analog signal output 2-channel analog signal input, 2-channel analog signal output 4-channel electric couple temperature input
Expansion Busbar Connection Power off the main module, remove the cover of the extension port at the right end of the main module, insert the extension cable of the extension module into this port, and replace the cover. Multiple expansion modules can be connected to one by one using this method. Removing extension port cover before connection
Main module Figure 7-1
7.3
Extension cable
Extension module
Cascade connection of expansion module
Expansion Module Addressing EC20 series main module can automatically recognize the expansion module connected to, and be sequential addressing automatically without user interference. When the system is normal after power on, the module conducts auto addressing once. Hereafter the address of each expansion module keeps unchanged during operation. Do not connect or disconnect any I/O expansion module or special function modules when the PLC is operating; otherwise the PLC may be damaged and cannot operate normally. You should power on the expansion module with self-carried power source and the main module at the same time, or power on the expansion module before the main module to ensure the reliable addressing of the expansion module.
EC20 Series PLC User Manual
24
7.3.1
Chapter 7 Expansion Module
I/O Point Addressing Number Principle I/O point numbering uses octal numbering system, and the serial number is as following: 0, 1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21…, without the figure 8 and 9. The numbering of the input port of the main module and I/O expansion module is: X0, X1, X2, …X7, X10, X11…; the output port is: Y0, Y1, Y2, …Y7, Y10, Y11…, and so on. Eight point numbers are a group. Insufficient section will be vacant. For example: EC20-2012BR module, the input port has 20 points, with serial number X0~X23. The port with serial number X24~X24 will be vacant; the X port of the subsequent expansion module is numbering from X30. In the same way, the output port has 12 points, the serial number is Y0~Y13, the port with serial number Y14~Y17 will be vacant and the Y port of the subsequent expansion module is numbering from Y20. According to the connection sequence to the main module, the numbering of X and Y ports of the I/O expansion module is in the increasing order. The example for the port logic numbering of the main module and the expansion module is as following: EC20-2012BR
7.3.2
0808ER
0808ER
X0 -X23
X30-X37
X40-X47
Y0 -Y13
Y20-Y27
Y30-Y37
4AD
0
4AD
1
4DA
2
0808ER
X50-X57
4TC
3
Y40-Y47
Special Function Module Addressing Number Principle The addressing number of the special function module is according to the unit of the module and independent of I/O expansion module addressing. Its address numbering is as following: 1, 2, 3, …6, 7; the minimum address number is 0; the maximum is 7. Eight special function modules can be connected to at the same time, and the number of the I/O expansion module added later will not affect the special function module addressing number. Take the module addressing number as the distinguishing identification upon call on. The software read-writing the corresponding data buffer memory (BFM) of the module with assigned address can call on the different channel inside the expansion module. More details refer to programming reference manual.
EC20 Series PLC User Manual
Chapter 8 Communication And Networking
25
Chapter 8 Communication And Networking 8.1
Communication Port The main module of EC20 series PLC has two series asynchronous communication ports: COM0 and COM1, supporting baud rate: 38400, 19200, 9600, 4800, 2400, and 1200bps. The feature and the function are shown in Table 8-1. Table 8-1
Port
Socket
Signal
COM0 Mini DIN8 RS232
COM1 EK500V
Characteristic of communication port of EC20 series main module
Work mode
Full-duplex
RS232 RS232 and Full-duplex can be RS485 selected half-duplex
Protocol provide Special programming protocol
Purpose Users programming, debugging and monitoring Supporting 9600bps and 19200bps only Can connect to HMI for operation, also network as slave ModBus slave station station equipment Free protocol User-defined protocol ModBus master station network as master station to control other equipment. Network as slave station equipment and connect to HMI ModBus slave station to operate Free protocol User-defined protocol
Among of which, the communication protocol of COM0 is selected by the operation control switch (ON/TM/OFF) on the side of the port. Refer to Figure 8-1.
ON/OFF confrot and protocol conversion COM0 port
COM1 port
RS232
Figure 8-1
RS485
Communication port and operation switch
Used as special port of user programming, COM0 can be compulsorily converted to programming protocol through ON/TM/OFF switch. The conversion relation between PLC operating status and the protocol used by COM0 refers to Table 8-2. Table 8-2
ON/TM/OFF switch position
status
ON
Operation
TM(ON TM)
Operation
TM(OFF TM)
Stop
OFF
Stop
COM0 protocol conversion by switch
COM0 port operation protocol Decided by user program and system configuration, it may be programming protocol, Modbus protocol, and free-port protocol. Compulsorily converted to programming protocol . If the system configuration of user program is free-portprotocol, it converts to programming protocol automatically after stop; otherwise the system configured protocol keep unchanged.
COM1 port is suitable to connect with the equipment that have communication function, such as variable speed drive, and uses Modbus protocol or RS485 port free protocol to control multiple equipment through network. COM1 port is fixed by screws. You can use a twisted pair line to make the communication signal cable by yourself. Note: you should not use RS232 port and RS485 port at the same time, and do not connect the cable to the ports that are not used; otherwise the communication may be interrupted. EC20 Series PLC User Manual
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8.2
Chapter 8 Communication And Networking
Programming Environment The user program of EC20 series PLC is running on ControlStar integrated software development environment developed by Emerson Network Power Co., Ltd. The operating system should support Microsoft Windows 98, Me, NT 4.0, Windows 2000 or XP. The basic system configuration is shown in Table 8-3: Table 8-3
Item CPU Memory Video card Communication port Others
Program environment basic configuration of EC20 series PLC
Lowest configuration Equivalent to Intel Pentium 233 or above 64M 640×480, 256
Recommended configuration Correspond to Intel Pentium 1G CPU or above 128M
800%600 resolution, 65535 color mode A DB9 output RS232 serial communication port A mouse, PLC program cable produced by Emerson Network Power Co., Ltd., an EC20 series main module, ControlStar programming software.
Detailed information refers to ControlStar Programming Software User Manual.
8.3
Programming Cable Emerson Network Power Co., Ltd provides a serial communication cable for download program. The model of the cable is B2053RASL1, and the two connectors at the cable ends are Mini-DIN8 and DB9. The cable is non-isolated. Users should not insert or pull out the cable with power on to avoid the equipment damage. Also our company provides an isolated RS232 cable for PLC, which can be hot swappable. ControlStar
Figure 8-2
Programming cable B2053RASL1
Develop environment of user program
EC20 Series PLC User Manual
Chapter 9 Cable Specification And Wiring
27
Chapter 9 Cable Specification And Wiring 9.1
Connecting Power Supply Cable Warning z
EC20 series PLC module have two kinds of input power supply: 220Vac and 24Vdc. You should check and identify before the wiring and powering on the module to avoid the equipment damage and other damages due to misoperation.
z
The PLC is designed for use in control circuit. There should have SPD in its AC power circuit, and its power circuit should be separated from the power circuit to avoid the overvoltage.
z
Do not connect AC power supply with 24Vdc output port of the main module, or connect DC power with 24Vdc output port of the main module.
z
Do not connect or disconnect the cable with power on. Otherwise it may get an electric shock or equipment damage. AC - N AC - L
L
PG
N
24V COM
24V X0 X7
24V COM PG Xn
Xm
+24V +5V GND
Switch Power supply
EC20-2012BR
4AD 4DA 4AM 4TC
0808ER
Figure 9-1b Connection example of AC power and auxiliary power
9.2
Connecting Ground Cable The reliable connection of an earth line can strengthen the safety and improve the PLC immunity to electromagnetism. When installing, connect PG port of the PLC power supply with the earthing object. It is recommended to use the AWG12~16 connection cable, as short as possible, and use an independent earthing device. A common route with the earthing line of other equipment (especially for the equipment with strong interference) should be avoided. As shown in Figure 9-2: Other equipment
PLC
Best
Other equipment
PLC
Better
Figure 9-2
Other equipment
PLC
Worst
Earthing wiring example of PLC and other equipment
When using a PLC expansion module, you should connect the earthing line of each module with earthing object separately, as shown in Figure 9-3:
EC20 Series PLC User Manual
28
Chapter 9 Cable Specification And Wiring Expansion module 1
PLC main module
Expansion module 2
PLC main module
Expansion module 2
Worse
Better
Figure 9-3
9.3
Expansion module 1
Earthing wiring example of PLC main module and expansion module
Connecting Common Port When wiring PLC system, there may be multiple cables connecting with the same port, such as +24V, COM, output common port COMn (refer to the figures in Section 5.9 and 6.5). The proper wiring method is to use an extension terminal bar with corresponding identification, which is convenient for wiring.
9.4
Cable Specification When wiring PLC system, it is recommended to use the multi-strand copper wire and ready-made isolated terminals to ensure the wiring quality. The recommended cross-sectional area and the model of the wire see Table 9-1. Table 9-1
Wire
Cross-sectional area
AC power wire (L, N) 1.0~2.0mm²
Recommended cable model of PLC
Recommended model AWG12, 18
Wiring terminal and heat-shrink tube to be connected H1.5/14 terminal, or terminal tin-plated
Earthing line (PG)
2.0mm²
AWG12
H2.0/14 terminal, or terminal tin-plated
Input signal line (X)
0.8~1.0mm²
AWG18, 20
Output signal line (Y) 0.8~1.0mm²
AWG18, 20
UT1-3 or OT1-3 cold-pressed terminal, Φ3 or Φ4 heat-shrink tube
The recommended cable preparation is shown in Figure 9-4: UT cold-pressed terminal
Heat-shrink tube
Line
Line number
OT cold-pressed terminal LDR> LD>= LDD>= LDR>= LD< LDD< LDR< LDinstruction Compare floating point number LD>instruction Compare integer LD>=instruction Compare double integer LD>=instruction Compare floating point number LD>=instruction Compare integer LD= AND< ANDD< ANDR< AND OR>= ORD>= ORR>= OR< ORD< ORR< OR=instruction Compare double integer AND>=instruction Compare floating point number AND>=instruction Compare integer AND=instruction Compare double integer OR>=instruction Compare floating point number OR>=instruction Compare integer OR= instruction Compare date instruction Compare time< instruction Compare time>= instruction Compare time
