PRO1 13e Analog

7/21/2019 PRO1 13e Analog

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SIMATICS7Siemens AG 2002. All rights reserved.

SITRAINTraining forAutomation and Drives

Analog Value Processing

Level

transmitter

High level

Low level


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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


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Using Analog Modules

Process

Physicalquantity Standardanalog signal

Sensor Transducer

Pressure

Temperature Flow Speed pH value Viscosity etc.

500mV

1V 5V 10V 20mA4 to 20mAetc.

DAC

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

Analog output module

MRmodule

ADC

Resultmemory

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

Analog input module CPU

::::::L PIW 352

T PQW 368:

Analogactuator

Physicalquantity

.........

..........................

...


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Measuring Range Module


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Analog Module Parameters

DoubleClick


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Analog Input Modules

SM335 (Inputs) SM331


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Analog Output Module

SM335 (Outputs) SM332


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Analog Value Representation of Different Measuring Ranges

Range

Overflow

Overrange

Rated range

Underrange

Underflow

Meas.range 10V

Voltagesuch as:

>= 11.759

11.7589:

10.0004

10.007.50:

-7.5-10.00

- 10.0004:

- 11.759

= 22.815

22.810:

20.0005

20.00016.000

::

4.000

3.9995:

1.1852

= 1000.1

1000.0:

850.1

850.0:::

-200.0

- 200.1:

- 243.0

=352.778

352.767:

300.011

300.000225.000

::

0.000

Negativevaluesnot

possible

Units

32767

32511:

27649

2764820736

::

0

- 32768

- 1:

- 4864


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Analog Value Representation for the Analog Outputs

Range

Overflow

Overrange

Rated range

Underrange

Underflow

Units

>=32767

32511:

27649

27648:0

:- 6912

- 6913:::

- 27648

- 27649:

- 32512


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Analog Module Addresses for the S7-300

IM256

to

270

336

to

350

352

to

366

368

to

382

304

to

318

320

to

334

272

to

286

288

to

302

(Send)

Slot 2 3 4 5 6 7 8 9 10 11

384

to

398

400

to

414

432

to

446

448

to

462

464

to

478

480

to

494

496

to

510

416

to

430

Rack 1

R0

Power

Supply

IM

(Receive)

Power

Supply CPU

512to

526

528to

542

544to

558

560to

574

576to

590

592to

606

608to

622

624to

638

Rack 2 IM(Receive)

PowerSupply

Rack 3 640

to

654

656

to

670

672

to

686

688

to

702

704

to

718

720

to

734

736

to

750

752

to

766

IM

(Receive)

Power

Supply


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Scaling Analog Input Values

HI_LIM = 500.0

LO_LIM = 0.0

0 27648-27648

bipolar (M 0.0 = 1)(Sensor also supplies negative voltage)

B

27648

HI_LIM = 500.0

LO_LIM = 0.0

0

unipolar (M 0.0 = 0)(Sensor supplies only positive voltage)

A

OUT

IN IN

OUT

x x+1

x x+1


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Unscaling Analog Output Values

27648

0

0.0(LO_LIM)

100.0(HI_LIM)

IN

OUT

0.0(LO_LIM)

100.0(HI_LIM)

IN

OUT

27648

-27648

A

B

unipolar (M 0.0 = 0)(Actuator is energized

only with positive values)

bipolar (M 0.0 = 1)(Actuator is energized withpositive and negative values)

0


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Exercise: Assigning Parameters to the Analog Module SM335


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Exercise: Assigning Parameters to the Analog Module SM331


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Exercise: Hardware Diagnostics with Diagnostic Interrupt


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CPUExercise: Recording and Displaying the Weight of Transported Parts

AI2AI1

Weight 0 to 500kg

-15V...+15VAI1

AI2 AO1AO2

V

010

Simulator

0...10VPIW 352

(PIW 304)

AI module

0...27648

QW 12(QW 6)

DO module

0 to 500 kg

BCD Display

1 2 30

Weight Display

for I 0.6 = 1

Documents

PRO1 13e Analog