Siemens SEZ50MB Manual del operador

SEZ50MB

RWDPrimaryControlsModbusInterface

BasicDocumentation

CB1P3099en_01

27.10.2009

Building Technologies

2 / 26

SiemensRWDPrimaryControls Modbus InterfaceCB1P3099en_01

Building Technologies27.10.2009

SiemensSwitzerland Ltd.

Building Technologies Group

International Headquarters

Gubelstrasse 22

CH-6301 Zug

Tel. +41 41-724 2424

Fax+41 41-724 3522

www.siemens.com/sbt

2009 Siemens Switz

erland Ltd.

Subject to change

3 / 26

SiemensRWD PrimaryControls Modbus InterfaceCB1P3099en_01

Building TechnologiesTableof Contents27.10.2009

Table of Contents

1About ThisDocument.................................................................................4

1.1 BeforeStarting...............................................................................................4

1.2 AdditionalDocuments....................................................................................4

1.3 Abbreviations&Terminologies......................................................................5

1.4 Important Notes.............................................................................................5

2ProductOverview........................................................................................6

3Commissioning SEZ50MB..........................................................................8

4ModbusOperation.....................................................................................10

5RWD Parameters& Addresses.................................................................14

6Appendix A:Standard IEEE-754 Format...................................................23

6.1.1 GeneralDescription.....................................................................................23

6.1.2 DataFormats...............................................................................................23

7Appendix B: Generating A CRC16 Check Sum.......................................24

8TroubleShooting Hints.............................................................................26

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SiemensRWDPrimaryControls Modbus InterfaceCB1P3099en_01

Building TechnologiesAbout ThisDocument27.10.2009

1AboutThis Document

1.1 Before Starting

Thisdocument appliestothe following products:

Name Type(ASN)

RWDModbusInterfaceUnit, AC 24V SEZ50MB

RWDStandardPrimaryControls,AC 230V RWD32

RWDStandardPrimaryControls,AC 24 V RWD62

RWDStandardPrimaryControls,AC 24 V RWD68

RWDStandardPrimaryControls,AC 24 V RWD82

RWDHeat PumpControls,AC 230V RWD34

RWDHeat PumpControls,AC 24V RWD44

RWDHeat PumpControls,AC 24V RWD45

RWDSolarControls, AC230V RWD32S

RWD&SEZ50MBAccessory:

Wallor Panel MountingEnclosure

ARG62.21

Thisdocument explains thegeneralfunctionsof the SEZ50MB andhow touseit to

monitor all controlparameters and update somewritablecontrolparameters forRWD’s

applications.

Product& Sales managers, Re-seller& OEM customerswhouseSEZ50MB to build

Modbusnetworkfor RWDdevices.

It isassumed that the target audiencehas:

•BasicunderstandingsonRWD products,Modbusprotocol andtheir applications.

Detailedinformationabout Modbuscanbeobtainedfrom www.Modbus.org;

•Knowledge of HVAC systemand localelectricalinstallation regulations where

SEZ50MB isemployed;

•Basic knowledge ofinstrumentationand control operation.

1.2 Additional Documents

Youcanrefer tothe following documentsforfurtherinformation:

Document Document No.

SEZ50MBRWDModbusInterface Unit, Datasheet N3099

RWD32 Standard PrimaryControls,Datasheet N3341

RWD62 Standard PrimaryControls,Datasheet N3341

RWD68 Standard PrimaryControls,Datasheet N3342

RWD82 Standard PrimaryControls,Datasheet N3343

RWD34 HeatPumpControls, Datasheet N3346

RWD44 HeatPumpControls, Datasheet N3346

RWD45 HeatPumpControls, Datasheet N3347

RWD32SSolar Controls, Datasheet N3344

SEZ50MB,Datasheet N3099

SEZ50MB,InstallationManual M3099

SEZ50MB,Operating Instructions B3099

RWD

Products

Use

TargetA

udience

Prerequisites

Further

nformation

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SiemensRWD PrimaryControls Modbus InterfaceCB1P3099en_01

Building TechnologiesAbout This Document27.10.2009

1.3 Abbreviations & Terminologies

NA NotAvailable

R-only ReadOnly

W-only WriteOnly

R-W Read& Write

Hex HexadecimalValue

Modbus Modbusisaserialcommunication protocolpublishedby

Modicon. Ithasbecomea standardcommunicationsprotocolin

industry.

1.4 Important Notes

Thissymbol drawsyour attentiontospecialsafetynotesandwarnings.If suchnotes

arenot observed, personal injuryand/orconsiderabledamagetopropertywouldoccur.

The productslisted under"ProductOverview"inSection2 must be usedforthe

applicationsin accordancewith productlisted onSection1.2of thisdocument(For

details, pleaserefer todatasheetofindividualproducts)

The prerequisitesforsafeand trouble-free operationof thisproduct arecorrect

transportation,storage, installation andcommissioning,as wellascareful operation.

Fuses,switches,wiringand grounding should be incompliance withlocalsafety

regulationsforelectricalinstallations.

Commissioningof thisproductandproductsconnectedwithit mustbe undertaken by

qualifiedstaff thathasbeen appropriatelytrainedby SiemensBuildingTechnologies.

Whenwiringthe system, the AC 230 V sectionmust be strictly segregated fromthe

safety extralow-voltage (SELV)section in order toensure protection againstelectric

shockhazard!FortheAC 24Vsupply, the AC24Vinput (G)andGround(G0)

terminalsareclearly labeledon eachproduct.These twowiresmustnotbe swapped.

Should system faultsoccurand you arenotauthorized tomakediagnostics andto

rectify faults, pleasecall yourservicestaff of SiemensBuildingTechnologies.

Onlyauthorized staffsarepermitted toperform diagnostics, torectifyfaults and to

restart the plant.

Forstorageand transport,the limitsgivenintherelevant datasheetsmustalwaysbe

observed.Ifyou haveanyquestions,pleasecontact yourlocalsupplier.

The productscontainelectricalandelectroniccomponentsand must not be disposed

of asdomesticwaste.

Current locallegislationsmustbeobserved!

Field of use

Correct use

Electrical

installation

Commissioning

Wiring

Faults

Storageand transport

Disposal

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SiemensRWDPrimaryControls Modbus InterfaceCB1P3099en_01

Building TechnologiesProduct Overview27.10.2009

2ProductOverview

The SEZ50MB enables remotemonitoringonRWDdevicesinthesameModbus

network.Please referred to SEZ50MB datasheet CB1N3099.

The SEZ50MB productisshownasbelow:

Thereareterminals,connector andindicatorontheSEZ50MB summarizing in the

followingtable:

SEZ50MB InterfaceTerminals, Connector and Indicator

AC 24VSELVPowerSupplyInterface (G, G0)

Modbus RS485 Interface(+, -,Ref)

RS232 Interface (DB9 Male Connector)

The Amber LEDIndicator

PowerSupply Connection &Communication (it willflash when data going in/out fromSEZ50MB)

AC 24V SELVPowerSupplyInterface(2-Pin Terminal)

G&G0terminalsareforAC24 VSELVpowersupply(LED indicatespower on)

ModbusRS485Interface (3-PinTerminal)

+, -DifferentialSignals

RefDifferentialCOMMON

SEZ50MBOverview

InterfaceSummary

Interface Descriptions

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SiemensRWD PrimaryControls Modbus InterfaceCB1P3099en_01

Building TechnologiesProduct Overview27.10.2009

RS232 Interface

A1.5meterslongRS232 cable isprovided togetherwith SEZ50MB andtheRS232

cable isone-to-onetype(thesame pinnumbersare connectedat both endsof this

cable). TheDB9malesocket of theRS232 cablewillbeconnected to RWD device

whilethe female plug will beconnected toSEZ50MB.

The tablebelowliststhepin numbersandtheir correspondingfunctionsofDB9female

plugsofRS232 interfaceconnectedtoSEZ50MB:

Pin No.Descriptions Functions(SEZ50MBside)

1 NotUsed Not Used

2 RXD Receive Input

3 TXD Transmit Output

4 Voltage Output1 DC +12V

5 ReferenceGround RS232 0 V

6 NotUsed Not Used

7 Voltage Output2 DC -12 V

8 NotUsed Not Used

9 NotUsed Not Used

Note: The DB9malesocket of RS232interface connectedon theRWD devicewill haveTXDatPin2

and RXD at Pin3;Pin 4 & 7 will be Inputs”.

The SEZ50MB device addresscanbe set viaa8-wayDIP switchandthe valid

addresses are 1to 247.

DIP switch Position à

1 2 3 4 5 6 7 8

Address No. Bit 7

Bit 6

Bit 5

Bit 4

Bit3

Bit 2

Bit1

Bit 0

BroadcastAddress (=0) 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 1

...

User Addresses (=1 to 247)

1 1 1 1 0 1 1 1

1 1 1 1 1 0 0 0

...

ReservedAddress (=248 to 255)

1 1 1 1 1 1 1 1

The communication settings suchasbaud rate, parityandstopbits canbeset viaa4-

wayDIP switch.

Device AddressBit

DeviceSetting

DIP switch

Position Function Settings ON (1) orOFF (0)

ON 19200 bps (Default)

1 Baud Rate Selection

OFF 9600 bps

2, 3 Parity&Stop Bits

OFF

ODD Parity,1Stop Bit

EvenParity,1 Stop Bit (Default)

NoneParity, 2StopBits

ON No Function

4 Reserved OFF No Function (Default)

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SiemensRWDPrimaryControls Modbus InterfaceCB1P3099en_01

Building TechnologiesCommissioning SEZ50MB 27.10.2009

3Commissioning SEZ50MB

BeforeconnectinganyRWD productstoSEZ50MB, theRWD devicemust be

configured tooneofitsavailableapplicationsmanuallyor viaRWD SWconfiguration

tool(Pleaserefer toRWD documentationfor moreinformation).

The RWDdeviceconnectedwithSEZ50MBmust beconfiguredtoa selected

applicationfirst.Various applicationsfor eachRWDcanbe selected viakeybuttons

withthehelpoftheLCD displayonthe RWD.Thestepsordetailsabouthow to

configure RWDdeviceshouldbereferredtoRWDdatasheet and itsInstallationand

CommissioningGuide.

Apart from manualconfigurationfor RWD,aRWDSW configurationtoolisavailable. It

isaSWprogramto run on aPCfor configuringRWD viatheRS232connection.More

information about the SW tool,pleasecontactyourlocal salesofficefor furthersupports.

Beforeturningon the powersupply, pleaseMAKE SUREthe followingsare checked:

•Check allrequiredconnectionsontheRWD device;

•ConfigureRWD device toadesired applicationmanuallyor viatheRWD SW tool

and checkifthestandalone operation of thisRWD isworkingproperly(Pleaserefer

toRWD Installation and Commissioning Guideor datasheet for moredetails);

•InstallSEZ50MBaccording totheinstallation manualCB1M3099;

•Set the8-wayDIPswitchfor SEZ50MB address(1 to247). If morethanone

SEZ50MBsareusedwithinthesameModbus network,differentDIPswitch

combinationsshouldbeused forother SEZ50MBs;

•Set the4-wayDIPswitchon SEZ50MBdevice for communication settingsand the

same communicationsettingsshouldbe applied to allSEZ50MBsconnected tothe

same Modbusnetwork;

•Connectthe RS232 cable(provided)between RWDdeviceand SEZ50MB;

•For theModbusnetwork,connectthe3-wireModbusterminals(+,-,Ref) of the

SEZ50MBdevicetoeitherthe RS232 COMportor USBport ofaPC via aRS232-

TO-RS485ora USB-TO-RS485converter(Please refer to “Modbus connection”of

next page);

•If multipleSEZ50MBsareusedinthesameModbusnetwork, itis recommended to

useasingleBUS typetopology (repeatersrequiredif >32 xSEZ50MBs)and to

terminatethe Modbusnetworkatbothendswith150 Ωresistorsfor best

performance.However,itisnot allowed toplacemorethan 2lineterminations on

one passive balanced pairand neverplace any linetermination on aderivation

cable;

•Connectpowersupply asper diagramson next page “Powersupplies”. Special

caresshouldbe taken inthereferenceground of eachpowersupply.The SEZ50MB

deviceisrecommendedtouse aSELVAC 24V supplyvoltage when connecting

withaAC 230 V RWD device.

Inordertoshorten the troubleshootingtime, itisrecommended to testtheModbus

connection withjust one RWD and one SEZ50MB device first.Then, checkifthe

remotemonitoringfunctions viaPCcan be executed properly, and thenconnectall

SEZ50MBstothe samenetwork.

Due topotential highsurge currentsalong thenetwork cable, itishighlyrecommended

touseRS485 converterswithgoodelectricalisolationforprotectingthe PC.

Configuring RWD

Manually

Configuring RWD

ViaSW TOOL

Power up

Recommendations:

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SiemensRWD PrimaryControls Modbus InterfaceCB1P3099en_01

Building TechnologiesCommissioning SEZ50MB 27.10.2009

Forbestperformance, the singleBUStopologyishighly recommended.

MODBUS RS485Type

MaxCable Length= 1000m

…

RefGND

Ref

SEZ50MB

RS232

RWDxx

RS232

Ref

SEZ50MB

RS232

RWDxx

RS232

Ref

SEZ50MB

RS232

RWDxx

RS232

Termination

Resistance of

both ends

150

Ω

GND

D+

D-

RS232

RS485

Converter

Isolated Converter Recommended

USB

…

Ref

SEZ50MB

RS232

RWDxx

RS232

Ref

SEZ50MB

RS232

RWDxx

RS232

Ref

SEZ50MB

RS232

RWDxx

RS232

Termination

Resistance

ofbothends

150

Ω

GND

D+

MODBUSRS485Type

MaxCableLength=1000m

RS232

RS485

Converter

IsolatedConverter Recommended

Inconsistentand wrong wiringstoG&G0supplyterminals forinternetworking

SEZ50MBModbussystem may causepermanentdamagestothedevices.

RWDxx

G G0

GG0

AC24VSELV

Modbus

RS232 RS232

SEZ50MB

GG0

RWDxx

G G0

SEZ50MB

GG0

G G0

AC 24 VSELV

RWDxx

G G0

SEZ50MB

GG0

G G0

AC24VSELV

SEZ50MB

GG0

RWDxx

G G0

Modbus

RS232 RS232

G G0

AC 24 VSELV

Note:

For each SEZ50MBdeviceconnected with RWDxxoperated at AC 230V, it

getsits AC 24VfromAC230 Vbya SELVelectrically isolated transformer(e.g.

Siemens SEM62.1 or SEM62.2). Toensure best performance, thisisolated transformer

shouldnot powerother devices.

SEZ50MB

GG0

RWDxx

G G0 SEZ50MB

GG0

AC 24 VSELV

RWDxx

L N

AC 230 V

Modbus

RS232 RS232 RS232

SEZ50MB

GG0

AC 24 VSELV

RWDxx

G G0

ModbusConnection

Power Supplies

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SiemensRWDPrimaryControls Modbus InterfaceCB1P3099en_01

Building TechnologiesModbus Operation 27.10.2009

4ModbusOperation

The validFunction Codesareas follows:

Function

Code (Hex)

Data

Length Functions

RWD Parameter

Addressable

Ranges

0x01 1 Read R/W Flag (Coil)

0x05 1 Write R/W Flag (Coil)

0xxxx

e.g. 00001, 00003

0x02 1 Read R-onlyFlag (DiscreteInput) 1xxxx

e.g. 10004

0x03 2 Read R/W Register (Holding Register)

0x10 2 Write R/W Register

4xxxx

e.g. 40109, 40111

0x04 2 Read R-onlyRegister (Input Register) 3xxxx

e.g. 30001, 30007

The following exampleswill illustrate howuserscanconstruct Modbusmessageswith

all availablefunctioncodesaboveandthe returnedmessagesfromtheRWD via

SEZ50MB.(To interpretthe meaningsof thereturned messages,pleaserefertothe

nextsectionRWDParameters& Addresses).

ReadRWD32Sparameter(ADDR =00001)called “bFrostEnable”withModbusADDR

=0000:

SEZ50MB

Device

Address

Function

Code

Modbus Address Data Length CRC16

Check

Send F7 01 00 00 00 01 E9 5C

SEZ50MB

Device

Address

Function

Code

Byte

Count

Status CRC16

Check

Respond F7 01 01 01

(bFrostEnable=Enable) A3 C0

ReadRWD68parameter(ADDR=10005)called “Q1_output”withModbus ADDR =

0004:

SEZ50MB

Device

Address

Function

Code

Modbus Address Data Length CRC16

Check

Send F7 02 00 04 00 01 EC 9D

SEZ50MB

Device

Address

Function

Code

Byte

Count

Status CRC16

Check

Respond F7 02 01 00

(Q1_output =Off) 92 00

ModbusFunction Codes

ExamplesOf Using

Different Modbus

Function Codes

FunctionCode0x01 à

FunctionCode0x02 à

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