PRO1 13e Analog

Analog Value Processing

High level

Level transmitter

SIMATIC® S7 Siemens AG 2002. All rights reserved.

Low level

Date: File:

02.05.2015 PRO1_13E.1

SITRAIN Training for Automation and Drives

Objectives

Upon completion of this chapter the participant will ... ...

know the principle of analog value processing

...

be able to assign parameters to an analog module using the "HW Config" tool and will be able to set the measuring range module that belongs to the module to the correct position

...

be able to address an analog module

...

be able to interpret the resolution of a module

...

be able to evaluate the result of an analog module in the program

SIMATIC® S7 Siemens AG 2002. All rights reserved.

Date: File:

02.05.2015 PRO1_13E.2

SITRAIN Training for Automation and Drives

Using Analog Modules Process Physical quantity

Sensor • • • • • • •

Standard analog signal

Result memory MR module

PIW ... PIW ... ::: PIW ...

ADC

Transducer

Pressure Temperature Flow Speed pH value Viscosity etc.

Physical quantity

Analog input module

± 500mV ± 1V ± 5V ± 10V ± 20mA 4 to 20mA etc.

Analog actuator

SIMATIC® S7 Siemens AG 2002. All rights reserved.

Analog output module

DAC

Date: File:

PQW ... PQW ... ::: PQW ...

02.05.2015 PRO1_13E.3

CPU : : : : : : L PIW 352

.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. T PQW 368 :

SITRAIN Training for Automation and Drives

Measuring Range Module

SIMATIC® S7 Siemens AG 2002. All rights reserved.

Date: File:

02.05.2015 PRO1_13E.4

SITRAIN Training for Automation and Drives

Analog Module Parameters

Double Click

SIMATIC® S7 Siemens AG 2002. All rights reserved.

Date: File:

02.05.2015 PRO1_13E.5

SITRAIN Training for Automation and Drives

Analog Input Modules SM335 (Inputs)

SIMATIC® S7 Siemens AG 2002. All rights reserved.

SM331

Date: File:

02.05.2015 PRO1_13E.6

SITRAIN Training for Automation and Drives

Analog Output Module SM335 (Outputs)

SIMATIC® S7 Siemens AG 2002. All rights reserved.

SM332

Date: File:

02.05.2015 PRO1_13E.7

SITRAIN Training for Automation and Drives

Analog Value Representation and Measured Value Resolution Bit no.

min. units

Bit value

Dec. Hex.

Resolution in bits + sign

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

VZ 214 213 212 211 210

29

28

27

26

25

24

23

22

21

20

8

128

80

*

*

*

*

*

*

*

*

*

0

0

0

0

0

0

0

9

64

40

*

*

*

*

*

*

*

*

*

*

0

0

0

0

0

0

10

32

20

*

*

*

*

*

*

*

*

*

*

*

0

0

0

0

0

11

16

10

*

*

*

*

*

*

*

*

*

*

*

*

0

0

0

0

12

8

8

*

*

*

*

*

*

*

*

*

*

*

*

*

0

0

0

13

4

4

*

*

*

*

*

*

*

*

*

*

*

*

*

*

0

0

14

2

2

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

0

15

1

1

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

SIMATIC® S7 Siemens AG 2002. All rights reserved.

= 0 or 1

Date: File:

02.05.2015 PRO1_13E.8

SITRAIN Training for Automation and Drives

Analog Value Representation of Different Measuring Ranges Voltage such as:

Current such as:

Resistance such as:

Temperature such as Pt100

Range Meas.range ± 10V Overflow Overrange

Rated range

Underrange

Underflow

Units

Meas.range 4 to 20mA

Units

Meas.range 0...300Ohm

Units

Meas.range -200...+850ºC

Units

>= 11.759

32767

>= 22.815

32767

>=352.778

32767

>= 1000.1

32767

11.7589 : 10.0004

32511 : 27649

22.810 : 20.0005

32511 : 27649

352.767 : 300.011

32511 : 27649

1000.0 : 850.1

10000 : 8501

10.00 7.50 : -7.5 -10.00

27648 20736 : -20736 -27648

20.000 16.000 : : 4.000

27648 20736 : : 0

300.000 225.000 : : 0.000

27648 20736 : : 0

850.0 : : : -200.0

8500 : : : -2000

- 10.0004 : - 11.759

- 27649 : - 32512

3.9995 : 1.1852

-1 : - 4864

-1 : - 4864

- 200.1 : - 243.0

- 2001 : - 2430