SBC PCD2/3.W745 Temperature measuring module Owner's manual

Brand: SBC

Model: PCD2/3.W745 Temperature measuring module

Type: Owner's manual

Document 26-796 | Edition ENG06 │ 2018-10-12

Manual

PCD2.W745 and PCD3.W745

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Content

0-1

0 Content

0.1 Document History ...........................................................................................0-2

0.2 Brands and trademarks .................................................................................0-2

1 Hardware

1.1 Introduction .....................................................................................................1-1

1.1.1 General ...........................................................................................................1-1

1.1.2 Function and application .................................................................................1-2

1.1.3 Main characteristics ........................................................................................1-2

1.1.4 Typical areas of use ........................................................................................1-2

1.2 Technical Data ................................................................................................1-3

1.3 Terminals and meaning of LEDs .....................................................................1-5

1.4 Presentation ...................................................................................................1-6

2 Conguration

2.1 Congurationofthemodule ...........................................................................2-1

2.2 Operating modes ............................................................................................2-2

2.3 Conguration&connectionexamples ............................................................2-4

3 Programming

3.1 Programming with Saia PCD

Classic ............................................................ 3-1

3.1.1 Programming with Saia PG5

FBoxes ...........................................................3-1

3.1.2 Programming with FBs ...................................................................................3-4

3.2 Programmingwithseriesxx7 .........................................................................3-7

A Appendix

A.1 Icons ...............................................................................................................A-1

A.2 ProgrammingexamplesforSaiaPCD

Classic systems ...............................A-2

A.3 Programmingexamplesforxx7series(inpreparation) .................................. A-6

A.4 CongurationonPCD3.T760RIOModule .....................................................A-7

A.5 Contact ..........................................................................................................A-8

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Content

0-2

0.1 DocumentHistory

Date Version Changes Remarks

2003-12-01 pEN01 - Preliminary Edition

2005-05-01 EN01 - Published Edition

2005-09-19 EN02 - New picture:

1.4 Block diagram

2012-05-02 EN03 - RegistersforusinginPCD3.T760

2012-08-10 EN04 - AppendixA:Addedchapter4Congurationon

PCD3.T760RIOModule

2013-10-10 EN05 - New logo and new company name

2018-10-10 ENG06 Chapt. A- Newphonenumber(validfromFebruary2015)

0.2 Brandsandtrademarks

Saia PCD

and Saia PG5

are registered trademarks of Saia-Burgess Controls AG.

STEP7

,SIMATIC

,S7-300

,S7-400

, and Siemens

are registered trademarks of

Siemens AG.

Technicalmodicationsarebasedonthecurrentstate-of-the-arttechnology.

Saia-Burgess Controls AG, 2018.

Allrightsreserved.

Published in Switzerland

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Hardware

1-1

Introduction

1 Hardware

1.1 Introduction

1.1.1 General

ThePCDx.W745isaprecisionanalogueinputmodulefortemperaturemeasurement

application.Linearizationandeachkindofcompensationaswellasconversioninto

°C, °F and K are carried out on this module. The module has four input channels,

whichcanbeconguredindividually.

Supported temperature sensors are:

● Thermocouples–TCtypeJ,K

● Resistivetemperaturedetectors–RTD’stypePt100,Pt1000,Ni100,Ni1000

Further, the module supports all common measurement techniques:

ForRTDs:

● Twowiresensorconnection

● Threewiresensorconnection

● Fourwiresensorconnection

For Thermocouples:

● Internalcoldjunctioncompensation:Thesensorsaredirectlyconnectedtothe

module I/O terminal.

● Externalcoldjunctioncompensation:Anexternalisothermalblockcanbeused.

 Thetemperatureoftheexternaljunctionismeasuredusingchannel0.

Thecongurationofthefourinputchannelsisdonebysoftware.Everychannelcan

be used independently of the others.

Diagnostics:

ThemodulePCDx.W745providespowerfulsensordiagnostics:

● Overrangedetection

● Underrangedetection

● Linebreakdetection

● ShortcircuitdetectionforRTD’s

Galvanic separation:

ThemodulehasgalvanicseparationbetweenSaiaPCD

ground and the sensor

interface(500VDC).

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Hardware

1-2

Introduction

1.1.2 Functionandapplication

ThePCDx.W745moduleisusedtomeasuretemperaturesinprecisionandwide

temperature range applications.

On the module, a micro controller controls the acquisition of the input signals. De-

pendingthecongurationthecontrolleradjuststhemeasurementamplier,multi-

plexesthecurrentsourcestothesensors,andcontrolsthesamplingoftheinput

channels.

Thelinearizationcurvesforthesupportedtemperaturesensorsarestoredonthe

module.Therefore,theCPUcandirectlyreadtemperaturevaluesfromthemodule.

The powerful sensor diagnostics allows to detect wiring errors. So the module indi-

cateswhenasensorlineisbrokenornotconnected.Further,overrangeandunder-

range diagnostics indicates misuse of the chosen sensor type.

1.1.3 Maincharacteristics

● Highprecisiontemperatureacquisitionsystem

● GalvanicseparationbetweenSaiaPCD

ground and input interface

● Themodulesupportsabignumberofsensortypes

● ThermocouplesandRTDsonthesamemodule

● Fourinputchannels,software–congurable

● Built–inreferencejunctionforthermocouples

● Possibilitytouseexternalreferencejunction

● RTDmeasurementtechniques:2-,3-,4-Wireconnection

● 4inputclampsperchannel

1.1.4 Typicalareasofuse

● Temperatureregulation/supervisioninindustrialapplications

● Measurementofveryhightemperaturesusingthermocouples

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Hardware

1-3

Technical Data

1.2 TechnicalData

Technical specication

Allspecicationsat25°Cambienttemperature,unlessotherwisenoted.

Sensor types TC Type J TC Type K

Pt100

Pt1000

Ni100

Ni1000

Input range for tempera-

ture sensors

-210…1200°C¹

DIN IEC 584

-270…1372°C¹

DIN IEC 584

-200…850°C

DINIEC751

-60…250°C

DINIEC43760

Measurement range -75mV…+75mV

Pt/Ni100:0…600Ω

Pt/Ni1000:0…5000Ω

Resolution

0.1°C 0.1°C

2.5μV

0.01Ω(600Ωrange)

0.10Ω(5000Ωrange)

Measuring error in % of

fullscalevalue²

0.05 % 0.05 %

Measuring error

in °C

Alternativetothe“measuringerrorin%”specicationabove:

-100…+100°C:<0.4°C

-150…+500°C:<0.7°C

-150…+1000°C:<1.0°C

-100…+100°C:<0.3°C

-150…+500°C:<0.4°C

-200…+850°C:<0.5°C

Temperaturecoecient

offullscalevalue²

10 ppm/K 80 ppm/K

Sampling time

per channel

250 ms

Measurement resolution 16 bit

50Hzrejection

60Hzrejection

>75dB

> 60 dB

Line break detection

   

Short circuit detection x x

 

Linearization on Board

Compensation of cold

junctiontemperature

on Board N/A

Coldjunctioninternal Yes³ N/A

Coldjunctionexternal Yes N/A

Connection techniques

forresistors(RTD’s)

N/A

2-wire

3-wire

4-wire

Galvanicisolation 500 VDC between Saia PCD

and analogue inputs

¹)Forthermocouples,thefullmeasurementrangeisoered.Thespecicationsofresolutionandaccu-

racyaregivenfortemperatureshigherthan-150°C.Forlowertemperaturesthan-150°C,thechar-

acteristicsofthermocouplesbecomeworse.Ifthermocouplesareusedinthisverylowtemperature

range,thetoleranceshouldbecalculatedusingthetolerancespecicationsforthe±75mVrangeand

the thermocouple characteristic.

²)Measuringerrorin%andtemperaturecoecientspecicationsmadeforthemeasurementranges

±75mV,600Ω,5000Ω.

³)Technicaldataoftheinternalcoldjunctionarespeciedinthefollowingsection.

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Hardware

1-4

Technical Data

General specications

PCD2.W745 Temperaturemodule,supportsthermocouplestypeJ,Kand

RTD’stypePt100,Pt1000,Ni100,Ni1000

→SuitableforPCD1&PCD2systems

PCD3.W745 Temperaturemodule,supportsthermocouplestypeJ,Kand

RTD’stypePt100,Pt1000,Ni100,Ni1000

→SuitableforPCD3systems

Ambient temperature Operation: 0...+50°Cwithoutforcedventilation

Storage: -25...+85°C

Power supply: Noexternalpowersupplynecessary

Internal power consumption

from+5Vbus:

200 mA

Wiregauge: max.0.5mm

²

(AWG20)

WireStripping: Remove10mmofisolation

Internal reference junction (internal cold junction)

Thebuilt-inReferenceJunctionisusedwhenthermocouplesaredirectlyconnected

to the module.

Built-in Temperature sensor

Operating temperature range: 0…55°C

Resolution: 0.1°C

Measuring error at 25°C: 0.8°C

DriftoveroperatingTemperatureRange(0…55°C): 0.05°C/°C

Stabilization time: 5 min.

TheCPUsPCD1/2/3andthebasicunitsPCD3providethefollowinginternalsupply:

Type +5 V V+

PCD3.Mxxxx 600 mA 100 mA

PCD3.C200 1000 mA 100 mA

PCD3.T76x 650 mA 100 mA

PCD2.M1xx 1600 mA 200 mA

PCD2.M48x 2000 mA 200 mA

PCD1.M1xx 750mA 100 mA

UsersofPCDx.W745modulesareurgedtochecktheoverallcurrentconsumptionof

allmodulesinaPCD1/2/3andinanyC100orT76xexpansionunitstoensurethat

thismaximumisnotexceeded.

Whenworkingwithanexpansionunitandupto8W745modules,itisbettertoplace

thePCDx.W745modulesinthebaseunitandtoplug“normal”I/Omodulesintothe

expansionunit.Thiswilleliminateanyinuencessuchasapossiblevoltagedrop

overtheconnectingcablefromtheexpansionunittothebaseunit.

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Hardware

1-5

TerminalsandmeaningofLED’s

1.3 TerminalsandmeaningofLEDs

The I/O connector block is numbered from 0 to 16, beginning on the right hand side.

Error

Sensor Error

Run

Rth3+

Sens3+

Sens3-

GND

Rth2+

Sens2+

Sens2

GND

Rth 1+

Sens1+

Sens1

GND

Rth0+

Sens0+

Sens0

GND

Input 3

Input 2

Input 1

Input 0

GND

Label description

Name Description

RthX+ ConstantcurrentoutputforRTDmeasurement

SensX+ Positivelineofthedierentialvoltageinput(Sense+)

SensX- Negativelineofthedierentialvoltageinput(Sense–)

GND SensorGround,galvanicseparatedfromSaiaPCD

Ground

X:InputNumber0…3

Meaning of the LEDs:

Run:   TheRunLEDblinkswhenthedataacquisitionisrunning

Error: The Error LED indicates that the module

hasnovalidconguration.

Sensor Error: Indicates that at least one of the inputs detects:

   ● noconnection

   ● linebreak

   ● shortcircuit

Thismoduleincludescomponentsthataresensitivetoelectrostaticdischarges.

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Hardware

1-6

Presentation

1.4 Presentation

Assembled module

Bus interface

Bus connector

power supply

Optocoupler

A/D converter

Analogue circuitry

Input filtering (EMC)

Diagnostic LEDs

Input clamp terminal

Galvanic separated

Block diagram

EMC Filter

source

MUX

Temperature

sensor

CJC int.

Input

Multiplexer

Optocoupler

SPI interface

I/O Bus interfaceBus connector

DC/DC converter

Insulated power

supply

Constant current

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Conguration

2-1

Congurationofthemodule

2 Conguration

2.1 Congurationofthemodule

Themodulehasfourinputchannels,whichareindividuallycongurable:

Input ranges / sensor types:

Thermocouples(TC) TypeJ/KaccordingtoIEC584

ResistiveTemperaturedetectors(RTD)

Pt100/Pt1000accordingtoIEC751

Ni100/Ni1000accordingtoDIN43760

Sensor type Range Output value Units

Type K

(NiCr-Ni)

-270…+1372°C

-454…+2501°F

+3…+1645K

-2700…+13720

-4540…+25010

+30…+16450

1/10°C

1/10°F

1/10 K

TypeJ

(Fe-CuNi)

-210…+1200°C

-346…+2192°F

+63…+1473K

-2100…+12000

-3460…+21920

+630…+14730

1/10°C

1/10°F

1/10 K

RTD

Pt100 -200…+850°C

-328…+1562°F

+73…+1123K

-2000…+8500

-3280…+15620

+730…+11230

1/10°C

1/10°F

1/10 K

Pt1000 -200…+850°C

-328…+1562°F

+73...+1123K

-2000…+8500

-3280…+15620

+730…+11230

1/10°C

1/10°F

1/10 K

Ni100 -60…+250°C

-76…+482°F

+213…+523K

-600…+2500

-760…+4820

+2130…+5230

1/10°C

1/10°F

1/10 K

Ni1000 -60…+250°C

-76…+482°F

+213…+523K

-600…+2500

-760…+4820

+2130…+5230

1/10°C

1/10°F

1/10 K

mV ±75mV -75…+75mV -30000…+30000 2.5μV*

Ohm

600Ω 0…600Ω 0…60000 10mΩ

5000Ω 0…5000Ω 0…50000 100mΩ

*mVrange:Outputvalue•2.5=voltageinμV

Connection & compensation techniques:

Connection / compensation techniques

RTD

Ohm

2–Wireconnection

3–Wireconnection

4–Wireconnection

Internalreferencejunction(CJCint.)

Externalreferencejunction(CJCext.)**

mV Voltage measurement using sense inputs

**Inthisoperatingmode,input0isusedtomeasurethetemperatureofthe

externalreferencejunction.

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Conguration

2-2

Operating modes

Measurement unit:

Themeasurementunitfortemperaturesensorscanbeconguredpermodule:

°C: Temperature output in 1/10 °C

°F: Temperature output in 1/10 °F

K: Temperature output in 1/10 K

ForvoltageandOhminputranges,thiscongurationtakesnoeect.

2.2 Operatingmodes

RTD and resistance measurement

ThemodulesupportsdirectconnectionofResistiveTemperatureDetectors(RTDs).

For this purpose, a precision current source supplies the sensors with a measure-

mentcurrentof250μA.

2 – Wire connection

The wiring resistance can not be compensated.

PCD x.W745

RthX+

SensX+

SensX -

GND

3 – Wire connection

Thevoltagedropoveroneofthetwosupplylinesismeasured.Assumingthatboth

supplylineshavethesameresistance,thewiringerroriscalculatedandcompen-

sated.

• Usethesamewiretypeforbothsupplylines

• Besurethatthelength/temperaturedistributionoverbothsupplylinesisiden-

tical

PCD x.W745

RthX+

SensX+

SensX -

GND

RTD

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Conguration

2-3

Operating modes

4 – Wire connection

Inthisoperatingmode,theinuenceofthesupplylinesiscompletelyeliminated.The

eectivevoltageonthetemperaturesensorismeasuredusingtwohigh–impedance

sense lines.

PCD x.W745

RthX+

SensX+

SensX-

GND

RTD

Thermocouple measurement

ThemodulePCDx.W745canbeconguredtomeasuretemperatureusingthermo-

couples.

Physical principle (Seebeck voltage):

Thetwodierentmetalsofthethermocouplegenerateasmallvoltage,whenthe

measurementjunctiontemperatureisdierentfromthereferencejunctiontempera-

ture.Thisvoltageallowstodeterminethetemperaturedierencebetweenthetwo

junctions.

Tocalculatetheabsolutetemperature,thereferencejunctiontemperaturemustbe

known.

Internal reference junction (CJC int. – Cold Junction Compensation internal)

In this operating mode, the thermocouples are directly connected to the input clamp

ofthePCDx.W745.Themodulemeasuresthetemperatureoftheclampterminaland

calculatesthetemperatureofthemeasurementjunction.

Thetemperatureoftheinputclampterminalshouldnotbeinuencedfromexternally,

forexamplethroughforcedairventilationorheatsourcesclosetotheclampterminal.

External reference junction (CJC ext. – Cold Junction Compensation external)

Thismodeisusedwhenanexternalisothermalclampisused.Thethermocouples

areconnectedtotheisothermalclamp;thevoltagesignalfromthethermocouplesis

transmitted to the module using copper wires.

Tocalculatetheabsolutetemperatureatthemeasurementjunction,thetemperature

oftheexternalisothermalclampterminalmustbemeasured.OnthemodulePCDx.

W745,input0isusedtoacquirethistemperature.Allselectabletemperaturesensors

canbeusedforthemeasurementoftheexternalreferencejunctiontemperature.

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Conguration

2-4

Conguration&connectionexamples

Connection of thermocouples

PCD x.W745

RthX+

SensX+

SensX

GND

Voltage measurement

Connection of ± 75 mV signal sources

PCD x.W745

RthX+

SensX+

SensX

GND

Voltage source

(± 75 mV)

2.3 Conguration&connectionexamples

General example for RTD and thermocouple connection:

Input 3

Sensor:

TC K

Comp.:

CJCint

Rth3+

Sens3+

Sens3 -

GND

Input 2

Sensor:

Pt100

Conn.:

3-wire

Rth2+

Sens2+

Sens2 -

GND

Input 1

Sensor:

Ni 1000

Conn.:

2-wire

Rth1+

Sens1+

Sens1-

GND

Input 0

Sensor:

Pt100

Conn.:

4-wire

Rth0+

Sens0+

Sens0

GND

RTD

Pt100

RTD

Pt100

RTD

Ni1000

PCDx.W745

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Conguration

2-5

Conguration&connectionexamples

Use of an external isothermal block (CJCext)

Input 0 temperature is used to make the

coldjunctioncompensationforallthermo-

coupleinputsconguredforCJCext.

(Inthissetupforchannel2)

Externalreferencejunction(CJCext.)

Isothermal block

RTD:Pt100/4-wire,usedtomeasurethe

temperature of the isothermal block

Input 3

Sensor:

TC J

Comp.:

CJCint

Rth3+

Sens3+

Sens3

GND

Input 2

Sensor:

TC K

Comp.:

CJCext

Rth2+

Sens2+

Sens2-

GND

Input 1

Sensor:

Ni 100

Conn.:

3-wire

Rth1+

Sens1+

Sens1-

GND

Input 0

Sensor:

Pt100

Conn.:

4-wire

Rth0+

Sens0+

Sens0

GND

Thermo

couple

type J

Thermocouple

type K

RTD

Ni100

PCDx.W745

Copper wires

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Programming

Programming with PCD Classic

3-1

3 Programming

3.1 ProgrammingwithSaiaPCD

Classic

3.1.1 ProgrammingwithSaiaPG5

FBoxes

Fortheeasyuseofthetemperaturemodule,anFBoxcalledPCD2.W745isincluded

inthestandardanalogueFBoxlibraryofSaiaPG5

Firstofall,thisFBoxallowsconguringthemoduleaccordingtotheindividualmeas-

urementsetup.OncetheFBoxhasconguredthemodule,itswitchesautomatically

indataacquisitionmode.Inadditiontothereadingoftheanaloguevaluesfromthe

W745,theFBoxdeliverspowerfuldiagnosticinformationaboutsensorfailures.

Forcorrectworking,theFBoxshouldbeplacedinacyclicorganisationblock(COB).

FBoxname: AnamecanoptionallybegiventotheFBox.

WhenseveralFBoxesareused,FBoxmusthaveanindividualname.

in0…in3: Analogueinputvalues(Format/Unit:Seechapter2)

Error: Channel errors, one byte per input channel:

Error register

Input 3 Input 2 Input 1 Input 0

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

x x x x x x x x x x x x x x x x

Comm. error Comm. error Comm. error Comm. error

Sensor error Sensor error Sensor error Sensor error

Underrange Underrange Underrange Underrange

Overrange Overrange Overrange Overrange

 Overrange: Measuredvalueistoohighforselectedrange

 Underrange: Measuredvalueistoolowforselectedrange

Sensor error: Line break / Open line / No sensor connected

 Comm.error: Communicationerror(noresponsefrommoduleW745)

 X:  Notused

Add: Module base address

LED: Green: Everythingok

 Red:  Atleastoneerrorbitset

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Programming

Programming with PCD Classic

3-2

AdjustWindow:

Error Display of communication errors with the module.

Clear button Button to clear the error.

Initialize module Shows module initialization progress.

Init button Buttontoforcemanuallyacheckofthemoduleconguration.If

necessary,themodulewillberecongured.

Temperature unit

Selection of temperature unit:

-Celsius: Temperaturevaluesin1/10°C

-Fahrenheit: Temperaturevaluesin1/10°F

-Kelvin: Temperaturevaluesin1/10K

Channel 0 to 3:

Sensor type Selection of sensor type.

Conguration/Connection Selectionofinputconguration/connection.

Oset Optionalconstanttemperatureosettocorrectcablingorsensor

error.

Filter T2 OptiontoinsertaT2lter.Theuseofthelterrequires5supple-

mentary registers for each channel

Filter time Timeconstant(2timesthesamevalue)oftheT2lter.

Diagnose Diagnoseofthechannel.ShowsOverrange,Underrange,Sensor

failure and Communication error.

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Programming

Programming with PCD Classic

3-3

Conguration/Connection

Voltage 2 Wires 3 Wires 4 Wires Internal

comp

External

comp

Sensor type

Not Used

     

Pt100

  

Pt1000

  

Ni100

  

Ni1000

  

R600

  

R5000

  

 

Voltage



Remarks:

● WhenCJCextiscongured,thetemperatureoftheexternalreferencejunc

 tionismeasuredusingchannel0.Therefore,channel0can’tbeconguredfor

 CJCext.

● Ifawrongcongurationissenttothemodule,theNoCongindicatorbecomes

high and the module does not go in data acquisition mode.

Fordetailedinformationaboutconnectionanduseofthedierentsensortypes,

please refer to chapter 2.

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Programming

Programming with PCD Classic

3-4

3.1.2 ProgrammingwithFBs

TousethePCDx.W745inSaiaPCD

Classicsystems,FBsaredeliveredinthe

Saia PG5

package.

FB Init

The Init FB has the following parameter structure:

FB Init

Parameter Type Description

K 1…16 [K] input moduleNumberaccordingtoleD2W745_B.mba

TC_K* [K] input Sensor type CH0

CJCint* [K] input Conguration/connectionCH0

TC_K* [K] input Sensor type CH1

CJCint* [K] input Conguration/connectionCH1

TC_K* [K] input Sensor type CH2

CJCint* [K] input Conguration/connectionCH2

TC_K* [K] input Sensor type CH3

CJCint* [K] input Conguration/connectionCH3

Celsius* [K] input Measurement unit

InitError [F] output Initialization error indicator

WrongCong [F] output Noorwrongcongurationindicator

NoCalibration [F] output Internal module calibration check

*Seetablebelowforpredenedcongurationcodes.

Predenedcongurationcodesforthesupportedtemperaturesensors:

Conguration / Connection

CJCint CJCext R2wire R3wire R4wire Voltage NotUsed

Input range

TC_K

 

TC_J

 

Pt100

  

Ni100

  

Pt1000

  

Ni1000

  

U75mV



R600

  

R5000

  

NotUsed



● WhenCJCextiscongured,thetemperatureoftheexternalreferencejunction

ismeasuredusingchannel0.Therefore,channel0can’tbeconguredfor

CJCext.

● Ifawrongcongurationissenttothemodule,theNoCongindicatorbecomes

high and the module does not go in data acquisition mode.

Predenedcongurationcodesforthemeasurementunit:

Celsius Temperaturevaluein1/10°C

Themoduleconvertsthemeasuredvalue

in the selected measurement unit.

Fahrenheit Temperaturevaluein1/10°F

Kelvin Temperaturevaluein1/10K

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Programming

Programming with PCD Classic

3-5

Thetemperatureunithasnoinuencetovoltage/ohmmeasurementranges.

FB Exec

Parameter structure:

FB Exec

Parameter Type Description

K 1…16 [K] input ModuleNumberaccord.toleD2W745_B.mba

ValueCH0 [R]output MeasuredvalueCH0

OverR_0 [F] output OverRangeindicatorforinput0

UnderR_0 [F] output UnderRangeindicatorforinput0

SnsFail_0 [F] output Sensor fail indicator for input 0

T CH1 [R]output Temperaturevalueinput1in1/10[Unit]

OverR_1 [F] output OverRangeindicatorforinput1

UnderR_1 [F] output UnderRangeindicatorforinput1

SnsFail_1 [F] output Sensor fail indicator for input 1

T CH2 [R]output Temperaturevalueinput2in1/10[Unit]

OverR_2 [F] output OverRangeindicatorforinput2

UnderR_2 [F] output UnderRangeindicatorforinput2

SnsFail_2 [F] output Sensor fail indicator for input 2

T CH3 [R]output Temperaturevalueinput3in1/10[Unit]

OverR_3 [F] output OverRangeindicatorforinput3

UnderR_3 [F] output UnderRangeindicatorforinput3

SnsFail_3 [F] output Sensor fail indicator for input 3

NoResponse [F] output Module not ready indicator

Temperaturevalue:

SignedInteger,representsthemeasuredvalueaccordingtotheselectedinputrange.

Diagnosticags:

Overrange/Underrangeindicatorsbecomeactivewhenthemeasurementvalueis

outsideofthespeciedrangeforthechosensensortype.

Sensorfailindicateserrorsinsensorconnection.ForRTDs,shortsandopenscanbe

detectedonboth,supplylinesandsenselines.Forthermocouples,theagindicates

line break.

NoResponse:

NoresponsefromW745.Checkifthemoduleispresentonthechosenbasead-

dress.

FB Status

Parameter structure:

FB Status

Parameter Type Description

K 1...16 [K] input moduleNumberaccord.toleD2W745_B.mba

MeasRun [F] output High when data acquisition is running

DiagRun [F] output High when sensor diagnostic is running

ComRun [F] output HighwhencommunicationtoW745ok

Saia-Burgess Controls AG

Manual for PCD2.W745 and PCD3.W745 │ Document 26-796 ENG06 │ 2018-10-12

Programming

Programming with PCD Classic

3-6

MeasRunning:

High state indicates that the data acquisition is running.

Afterstart-up,thisindicatorstayslowduringtherstsamplingcycle.Atthetimeit

goeshigh,allofthefourinputchannelshaveanactualvaluewhichcanbereadout.

DiagRunning:

Highstatemeansthatthesensordiagnosticisrunning(Overrange/Underrange/

SensorFail)

Afterstart-up,theDiagRunningagstayslowduringtherstsensorfailcheckcycle.

Whenitswitchestohighstate,allsensorsarecheckedandthechanneldiagnostics

arevalid.

ComRunning:

Thisagbecomeshighwhenthecommunicationtothemoduleisok.

Installation of the FBs

Thefollowing3lesarenecessary:

● D2W745_B.src

● D2W745_B.equ

● D2W745_B.mba

Saia PG5

libraryles:

The*.srcandthe*.equlesshouldbeintheSaiaPG5

FB library:

C:\…\SBC\PG5xxx\Libs\FB\...

ModuleBaseAddressdenition:

The*.mbalemustbeaddedtotheSaiaPG5

project.Thislecanbemodiedby

theuseraccordingtothenumberofusedW745modulesandthecorrespondingbase

addresses.

Include the FBs:

TheleD2W745_B.equmustbeincludedintheprogramlebeforetheFBscanbe

called:

$INCLUDE D2W745_B.equ

Use in a cyclic organisation structure

ThesamplingtimeofthePCDx.W745moduleis250msperchannel.Toachievebest

systemperformance,itisrecommendedtoimplementa‘NoCommunication’timer.

IntheexampleintheAppendixa100mstimerisimplemented.SotheFBsExec

andStatusareexecutedinmaximumevery100ms.Thisreducesunnecessarydata

transfersontheI/OBusandimprovesthesystemperformance.

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SBC PCD2/3.W745 Temperature measuring module Owner's manual

SBC PCD2/3.W745 Temperature measuring module Owner's manual

SBC PCD2/3.W745 Temperature measuring module Owner's manual

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