Siemens SEZ50MB Operator's manual

SEZ50MB
RWDPrimaryControlsModbusInterface
BasicDocumentation
CB1P3099en_01
27.10.2009
Building Technologies

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SiemensRWDPrimaryControls Modbus InterfaceCB1P3099en_01
Building Technologies27.10.2009
SiemensSwitzerland Ltd.
Building Technologies Group
International Headquarters
Gubelstrasse 22
CH-6301 Zug
Tel. [phone]
Fax[phone]
www.siemens.com/sbt
2009 Siemens Switz
erland Ltd.
Subject to change

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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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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
I
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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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
ON
1
2
3
4
5
6
7
8
DeviceSetting
ON
1
2
3
4
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
ON
OFF
ON
OFF
OFF
ON
ON
ODD Parity,1Stop Bit
EvenParity,1 Stop Bit (Default)
NoneParity, 2StopBits
NoneParity, 2StopBits
ON No Function
4 Reserved OFF No Function (Default)

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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.
A
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
RX
TX
GND
TX
RX
GND
D+
D-
RS232
-
TO
-
RS485
Converter
Isolated Converter Recommended
B
USB
USB
…
+
-
Ref
Ref -+
SEZ50MB
RS232
RWDxx
RS232
Ref -+
SEZ50MB
RS232
RWDxx
RS232
Ref -+
SEZ50MB
RS232
RWDxx
RS232
+
-
Termination
Resistance
ofbothends
150 Ω
GND
D+
D
-
MODBUSRS485Type
MaxCableLength=1000m
RS232
-
TO
-
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
GG0
AC 24 VSELV
RWDxx
L N
LN
AC 230 V
Modbus
RS232 RS232 RS232
SEZ50MB
GG0
GG0
AC 24 VSELV
RWDxx
G G0
ModbusConnection
Power Supplies

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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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ReadRWD68parameter(ADDR=40117,40118) called “SP3day”withModbusADDR
=0116, 0117:
SEZ50MB
Device
Address
Function
Code
ModbusAddress Data Length CRC16Check
Send F7 03 00 74 00 02 90 87
SEZ50MB
Device
Address
Function
Code
Byte
Count
Status
(IEEE754 format)
CRC16Check
Respond F7 03 04 41 E000 00
(SP3 daysetpoint 28 °C) 79 F6
ReadRWD68parameter(ADDR=30055,30056) called “RWDAPP”withModbus
ADDR =0054, 0055:
SEZ50MB
DeviceAddress
Function Code Modbus AddressData Length CRC16 Check
Send F7 04 00 36 00 02 85 53
SEZ50MB
DeviceAddress
Function Code Byte Count Status
(IEEE 754 format)
CRC16 Check
Respond
F7 04 04 42 4800 00
(Application No. is50) 92 00
WriteRWD32S parameter(ADDR =00001)called “bFrostEnable”withModbusADDR
=0000:
SEZ50MB
DeviceAddress
Function Code Modbus AddressValue CRC16 Check
Send F7 05 00 00 FF 00 98 AC
SEZ50MB
DeviceAddress
Function Code Modbus AddressValue CRC16 Check
Respond
F7 05 00 00 FF 00 98 AC
Note: Only twopossibilitiesfor Valueabove - writing a 0”using Value=0x 00 00
or writinga 1”using Value =0xFF00
WriteRWD68parameter(ADDR = 40117, 40118) called “SP3day”withModbusADDR
=0116, 0117:
SEZ50MB
DeviceAddress
FunctionCode Modbus AddressData Length Byte
Count
Send F7 10 00 74 00 02 To below
Data
Length
Byte
Count
Status
(IEEE754 format)
CRC16Check
From
Above 04 41 E800 00 (SP3 daysetpoint 29 °C) 7C FB
SEZ50MB
Device Address
Function Code Modbus Address Data Length CRC16
Check
Respond
F7 10 00 74 00 02 1544
FunctionCode0x03 à
FunctionCode 0x04 à
FunctionCode0x05 à
FunctionCode0x10 à

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Building TechnologiesModbus Operation 27.10.2009
Wheneveran unexpectedmessageisreceived or anerror isencountered bySEZ50MB,
the SEZ50MBwouldreturna RESPONDforsucherrors.Modbuscommunicaton frame
contains anerror fieldforexceptioncodes,which canbeused bynetworkapplicationto
determine what appropriated actionwillbe taken.
Exception Code (Hex) Function Code Descriptions
0x01 Illegal FunctionCode
0x02 ModbusID Check Error
0x03 Range CheckError
0x04 RWD is Lost
0x06 SEZ50MB is Busy
0x07 GatewayDevice Lost
0x14 Wrong SettingFor Quantityof Items In Modbus Frame
The sameexamplesfor theconstructingFunction Codesare used but errorsareadded
toillustrate howSEZ50MBresponsesandhandles abnormalsituation by returninga
message containing exception codesto theusers.
ReadRWD32Sparameter(ADDR =00001)called “bFrostEnable”withModbusADDR
=0000:
SEZ50MB
Device
Address
Function
Code
ModbusAddress Data Length CRC16
Check
Send F7 01 00 00 00 00 E9 5C
↑WRONGINFO
SEZ50MB
Device
Address
Function
Code
Exception Code CRC16
Check
Respond F7 81 14 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 00 EC 9D
↑WRONGINFO
SEZ50MB
Device
Address
Function
Code
Exception Code CRC16
Check
Respond F7 82 14 2D 5D
ReadRWD68parameter(ADDR=40117,40118) called “SP3day”withModbusADDR
=0116, 0117:
SEZ50MB
Device
Address
Function
Code
ModbusAddress Data Length CRC16Check
Send F7 03 00 74 00 00 or 01
D0 86
↑WRONGINFO
SEZ50MB
Device
Address
Function
Code
Exception Code CRC16Check
Respond F7 83 14 A1 0D
ExceptionCodes
ExamplesOf Errors
FunctionCode0x01 à
(Error Message)
Function Code 0x02 à
(Error Message)
FunctionCode0x03 à
(Error Message)

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ReadRWD68parameter(ADDR=30055,30056) called “RWDAPP”withModbus
ADDR =0054, 0055:
SEZ50MB
DeviceAddress
Function Code Modbus AddressData Length CRC16 Check
Send F7 04 00 36 00 00or 01
85 53
↑WRONGINFO
SEZ50MB
Device
Address
Function
Code
Exception Code CRC16Check
Respond F7 84 14 A3 3D
WriteRWD32S parameter(ADDR =00001)called “bFrostEnable”withModbusADDR
=0000:
SEZ50MB
DeviceAddress
Function Code Modbus AddressValue CRC16 Check
Send F7 05 00 00 FF FF 98 AC
↑WRONGINFO
OR
SEZ50MB
DeviceAddress
Function Code Modbus AddressValue CRC16 Check
Send F7 05 00 00 00 FF 98 AC
↑WRONGINFO
SEZ50MB
Device
Address
Function
Code
Exception Code CRC16Check
Respond F7 85 03 E2 A3
Note: Only twopossibilitiesfor Value column –writing a 0”usingValue =0x 00 00
or writing a 1”usingValue =0xFF00
WriteRWD68parameter(ADDR = 40117, 40118) called “SP3day”withModbusADDR
=0116, 0117:
SEZ50MB
DeviceAddress
FunctionCode Modbus AddressData Length Byte
Count
Send F7 10 00 74 00 01 To below
↑WRONGINFO
Data
Length
Byte
Count
Status
(IEEE754 format)
CRC16Check
From
Above 04 41 E800 00 (SP3 daysetpoint 29 °C) 7C FB
OR
SEZ50MB
DeviceAddress
FunctionCode Modbus AddressData Length Byte
Count
Send F7 10 00 74 00 02 To below
Data
Length
Byte
Count
Status
(IEEE754 format)
CRC16Check
From
Above 05 41 E800 00 (SP3 daysetpoint 29 °C) 7C FB
↑WRONGINFO
SEZ50MB
Device
Address
Function
Code
Exception Code CRC16Check
Respond F7 90 14 AC 3D
FunctionCode0x04 à
(Error Message)
FunctionCode0x05 à
(Error Message)
FunctionCode0x10 à
(Error Message)

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•TheSEZ50MB only supportModbus commandsfor either READorWRITEof one
parametereachtime. If accesstoconsecutiveparameters isrequired, usersshould
issuemultiplecommandsmanuallyorviaanyModbusSWtool;
•Each commandstringmayvarydepending onfunctioncode used, somefunction
codesmay take longertimeto beprocessedby SEZ50MB. The longest processtime
of SEZ50MB wouldbearound6seconds;
•Somevaluesmaybe roundedbySEZ50MB beforepassing toRWD inorder to fulfill
thecurrentSTEPSIZE andRESOLUTION. Forexample,if asetpoint isentered as
16.7, it willbepresented as16.7or roundedto 16.5 –dependson itsresolution
settings;
•Theparameter with #isnot recommendedto beused during thenormal operation of
RWD,butcanbe usedduringmaintenance.
E.g.Write specificvalueto parameteraddress “40179”with function code “0x10”and
itwill causereset.
Therefore, specialattentionisrequired:
Write12(0x0C)todeviceaddress “40179”toreset RWD32/62/68/82
Write167 (0xA7)todeviceaddress “40179”toreset RWD34/44/45
5RWDParameters&Addresses
The following parametertablecontains allavailableRWD parametersincludingall input
and outputsignalstatus. These parameters aremainlyfor monitoringfunctionsvia
Modbusnetworkandsomeof themcanbemodified duringoperation.
Besidesfunctioncodes(READ orWRITE) providedinsection4,youalso can refer to
the following parameter tableforthe interpretationofthecorrect respondsorreturned
values. FormoredetailsaboutRWDparameters,please checkindividual RWD
datasheet.
•Please refertoSEZ50MB Parameter Toolfor validparametersofdifferentRWD
models;
•AvoidfrequentdailyWRITE actionstoRWDviaModbusbecausetherearelimited
write cyclesallowedfor the memoryand storage deviceswhereall RWD SW
parametersstored;
•The *next to the parameteraddresses indicate thatthisparameter canexecuteboth
READ and WRITE functioncodes;
•The #meansthisparameter shouldnot beusedfornormaloperation;
•Iferroroccursduringtheoperation orerror messagereceived, pleaserefer to the
section "TroubleShooting" for more information.
Notes:
Notes:

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RWD
Parameter
Addresses
RWD
Parameters Data Format Detailed Descriptions & Data Interpretation
00001 * bFrostEnable 0xFF00
represent 1
0x0000
represent 0
For RWD32Sonly,
0: FrostProtectDisabled
1: FrostProtectEnabled
00002 * bGRADEnable 0xFF00
represent 1
0x0000
represent 0
For RWD32Sonly,
0: GRAD Disable
1: GRAD Enable
00003 * B3_Display 0xFF00
represent 1
0x0000
represent 0
For RWD32Sonly,
0: Disable thedisplayofB3sensor
1: Enable the displayofB3sensor
10001 Ind_Flag BCD Configuration of ‘Cooling/Direct’or ‘Heating
/Reverse’
0: Cooling/Direct
1: Heating/Reverse
10002 Relay BCD Reversing Valve ON/OFF during nodemand
0: Reverse valve OFF
1: Reverse valve ON
10003 State_H/C BCD Output Configuration for1H/1C or2H/2C
0: 1H/1C
1: 2H/2C
10004 D1_Input BCD For RWD32/62/68/82 & RWD34/44/45,
Digital Inputfor D1 (Day/Night)
0: Close (Night)
1: Open (Day)
10005 Q1_output BCD Digital Output forQ1
0: Relayde-energized
1: RelayEnergized
10006 Q2_output BCD Digital Output forQ2
0: Relayde-energized
1: RelayEnergized
10007 Q3_output BCD Digital Output forQ3
0: Relayde-energized
1: RelayEnergized
10008 Q4_output BCD Digital Output forQ4
0: Relayde-energized
1: RelayEnergized
10009 D1_Input_RWD32S BCD For RWD32Sonly,
Digital Inputfor D1
0: Close
1: Open
10010 Flag_monitor BCD Remote monitoring
- i.e. Y1 (0 to10V) representsX1(0to 50C)
0: Notselected
1: Selected
30001 X1_input IEEE754 X1(Sensor) Input
30003 X2_input IEEE754 X2(Sensor) Input
30005 X3_input IEEE754 X3(Sensor) Input
Parameters

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RWD
Parameter
Addresses
RWD
Parameters Data Format Detailed Descriptions & Data Interpretation
30007 Y1_output IEEE754 AnalogOutput of Y1
30009 Y2_output IEEE754 AnalogOutput fo Y2
30011 TempUnit IEEE754 For RWD32STemp Unit
0: Celsius
1: Fahrenheit
30013 SensorType IEEE754 For RWD32SSensorType
0: NI1000
1: PI 1000
30015 D1_func IEEE754 For RWD34/44/45 only,
FunctionSetting for Input D1
0: ON/OFF
1: Day/Night
2: Alarm
3: FilterAlarm
30017 UNIT IEEE754 For RWD32/62/68/82 & RWD34/44/45,
Unit Setting for Input X1
0: Celsius
1: Fahrenheit
2: Null
3: %
30019 UNIT3 IEEE754 For RWD34/44/45,
Unit Setting for Input X3
0: Celsius
1: Fahrenheit
2: %
3: Null
4: Remote monitoring
30021 TYPE1 IEEE754 For RWD32/62/68/82 & RWD34/44/45,
Selectionof SensorTypeforInput X1
0: Ni1000
1: Pt1000
2: 0 to10 V
3: VR
30023 TYPE2 IEEE754 For RWD32/62/68/82 & RWD34/44/45,
Selectionof SensorTypeforInput X2
0: Ni1000
1: Pt1000
2: 0 to10 V
3: VR or Digital Input
30025 TYPE3 IEEE754 For RWD34/44/45,
Selectionof SensorTypeforInput X3
0: Ni1000
1: Pt1000
2: 0 to10 V
3: VR or Digital Input
30027 Compressor_Stage IEEE754 Compress Stage Selection Status:
1: Stage1
2: Stage2

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SiemensRWD PrimaryControls Modbus InterfaceCB1P3099en_01
Building TechnologiesRWD Parameters& Addresses27.10.2009
RWD
Parameter
Addresses
RWD
Parameters Data Format Detailed Descriptions & Data Interpretation
3: Stage3
30029 RWDType IEEE754 RWD Type
0: RWD62
1: RWD34
2: RWD32S
3: RWD68
4: RWD32/82
5: NA
6: RWD45
7: RWD44
30031 X1_H IEEE754 HighRange for X1(Sensor)Input
30033 X1_L IEEE754 LowRange for X1 (Sensor)Input
30035 X2_H IEEE754 HighRange for X2(Sensor)Input
30037 X2_L IEEE754 LowRange for X2 (Sensor)Input
30039 X3_H IEEE754 HighRange for X3(Sensor)Input
30041 X3_L IEEE754 LowRange for X3 (Sensor)Input
30043 3P_Output IEEE754 % of valveopened
30045 B1_TEMP IEEE754 Temperaturesampled via B1sensor input
32767: B1input OPEN
32767 to -32768:Valueas per IEEE754
-32768:B1input Shorted toGround
30047 B2_TEMP IEEE754 Temperaturesampled via B2sensor input
32767: B2input OPEN
32767 to -32768:Valueas perIEEE754
-32768:B2input Shorted toGround
30049 B3_TEMP IEEE754 Temperaturesampled via B3sensor input
32767: B3input OPEN
32767 to -32768:Valueas perIEEE754
-32768:B3input Shorted toGround
30051 COST_SAVED IEEE754 Total costsaved byheating system
30053 LIMIT_STATUS Referto each
bitfor
explanation
Status of therelays
Bit 0: B2_Limit_Min_Charge
0: Notinlimitation status
1: Inminimumcharging limitationvia B2
Bit 1: B3_Limit_Min_Charge
0: Notinlimitation status
1: Inminimumcharging limitationvia B3
Bit 2: B3_Limit_Max_Tank
0: Notinlimitation status
1: Inmaximum tanktemperaturelimitation viaB3
Bit 3: B1_Limit_Max_Tank
0: Notinlimitation status
1: Inmaximum tanktemperaturelimitation viaB1
Bit 4: B2_Limit_FrostProtect
0: Notinfrost protect status
1: Infrost protect status viaB2
Bit 5: B3_Limit_FrostProtect
0: Notinfrost protect status
1: Infrost protect status viaB3
Bit 6: COST_OUT_RANGE
0: Still in range of 0to 9999

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SiemensRWDPrimaryControls Modbus InterfaceCB1P3099en_01
Building TechnologiesRWDParameters&Addresses27.10.2009
RWD
Parameter
Addresses
RWD
Parameters Data Format Detailed Descriptions & Data Interpretation
1: The costhaspassed9999
Bit 7: Reserved and fixed to 0
30055 RWDAPP IEEE754 RWD Application Number
30057 SensorStat Referto each
bitfor
explanation
Status of Various Sensors
For RWD32/62/68/82,
(onlyBits0 to 3 are for users)
Bit 0: X1 errorstatus
0: No error,
1: Error
Bit 1: X2 errorstatus
0: No error
1: Error
Bit 2: X1 range status
0: Within range
1: Out of range
Bit 3: X2 range status
0: Within range
1: Out of range
Bit 4 toBit 7:non-user status
------------------------------------------------------
For RWD34/44/45,
(onlyBits0 to 5 are for users)
Bit 0: X1 errorstatus
0: No error
1: Error
Bit 1: X2 errorstatus
0: No error
1: Error
Bit 2: X3 errorstatus
0: No error
1: Error
Bit 3: X1 range status
0: Within range
1: Out of range
Bit 4: X2 range status
0: Within range
1: Out of range
Bit 5: X3 range status
0: Within range
1: Out of range
Bit 6 & Bit 7: non-user status
30059 X2_digit IEEE754 Status of digital input X2
0: Close
1: Open
30061 X3_digit IEEE754 Status of digital input X3
0: Close
1: Open
30063 WinSum_Mode IEEE754 Status of Winter/SummerMode
0: Summermode
1: Winter mode
40001 ALTSUM IEEE754 Summer ChangeOver Set Point

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SiemensRWD PrimaryControls Modbus InterfaceCB1P3099en_01
Building TechnologiesRWD Parameters& Addresses27.10.2009
RWD
Parameter
Addresses
RWD
Parameters Data Format Detailed Descriptions & Data Interpretation
40003 ALTWIN IEEE754 WinterChangeOver SetPoint
40005 Eco_xp IEEE754 P Band in EconomyCool Mode
40007 LIMMAX_Cas IEEE754 Maximum of Absolute Limiter.
(Used inRWD32/62/68/82,
applicationno=15, 25, 35, 45, etc.)
40009 LIMMIN_Cas IEEE754 MinimumofAbsolute Limiter.
(Used inRWD32/62/68/82,
applicationno=15, 25, 35, 45, etc.)
40011 LIMTn1 IEEE754 I_action Time of Heating inLimiter Mode
40013 LIMTn3 IEEE754 I_action Time of Cooling inLimiter Mode
40015 LIMXP1 IEEE754 P Band of HeatinginLimiter Mode
40017 LIMXP3 IEEE754 P Band for Limiter Cooling 1
40019 Rly_On IEEE754 Relay Turning ONSetPoint in % of OutputY
40021 Rly_Off IEEE754 Relay Turning OFF SetPointin%of Output Y
40023 SD IEEE754 Switch Differential Q1+Q2
40025 SD1 IEEE754 Switch Differential of Q1
40027 SD2 IEEE754 Switch Differential of Q2
40029 SD_H1 IEEE754 Switch Differential of H1
40031 SD_H2 IEEE754 Switch Differential of H2
40033 SD_H3 IEEE754 Switch Differential of H3
40035 SD_C1 IEEE754 Switch Differential of C1
40037 SD_C2 IEEE754 Switch Differential of C2
40039 SD_C3 IEEE754 Switch Differential of C3
40041 SFTC IEEE754 Shift Cooling
40043 SFTH IEEE754 Shift Heating
40045 SHENC IEEE754 Shift EndPointof Cooling
40047 SHENH IEEE754 Shift EndPointof Heating
40049 SHSTC IEEE754 Shift Start Pointof Cooling
40051 SHSTH IEEE754 Shift Start Pointof Heating
40053 * SP_C1 IEEE754 SetPoint ofCooling 1
40055 * SP_C1_day IEEE754 SetPoint ofCooling 1 for Day
40057 * SP_C1_night IEEE754 SetPoint ofCooling 1 for Night
40059 * SP_C2 IEEE754 SetPoint ofCooling 2
40061 * SP_C2_day IEEE754 SetPoint ofCooling 2 for Day
40063 * SP_C2_night IEEE754 SetPoint ofCooling 2 for Night
40065 * SP_C3 IEEE754 SetPoint ofCooling 3
40067 * SP_C3_day IEEE754 SetPoint ofCooling 3 for Day
40069 * SP_C3_night IEEE754 SetPoint ofCooling 3 for Night
40071 * SP_H1 IEEE754 SetPoint ofHeating 1
40073 * SP_H1_day IEEE754 SetPoint ofHeating 1 for Day
40075 * SP_H1_night IEEE754 SetPoint ofHeating 1 for Night
40077 * SP_H2 IEEE754 SetPoint ofHeating 2
40079 * SP_H2_day IEEE754 SetPoint ofHeating 2 for Day
40081 * SP_H2_night IEEE754 SetPoint ofHeating 2 for Night
40083 * SP_H3 IEEE754 SetPoint ofHeating 3
40085 * SP_H3_day IEEE754 SetPoint ofHeating 3 for Day
40087 * SP_H3_night IEEE754 SetPoint ofHeating 3 for Night
40089 * SP_ind_C IEEE754 SetPoint ofCooling for indY
(Used inRWD45applicationno =70to 99)

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SiemensRWDPrimaryControls Modbus InterfaceCB1P3099en_01
Building TechnologiesRWDParameters&Addresses27.10.2009
RWD
Parameter
Addresses
RWD
Parameters Data Format Detailed Descriptions & Data Interpretation
40091 * SP_ind_C_dayIEEE754 SetPoint ofCooling for indYforDay
(Used inRWD45applicationno =70to 99)
40093 * SP_ind_C_night IEEE754 SetPoint ofCooling for indYfor Night
(Used inRWD45applicationno =70to 99)
40095 * SP_ind_H IEEE754 SetPoint ofHeating forindY
(Used inRWD45applicationno =70to 99)
40097 * SP_ind_H_day IEEE754 SetPoint ofHeating forindY for Day
(Used inRWD45applicationno =70to 99)
40099 * SP_ind_H_night IEEE754 SetPoint ofHeating forindY for Night
(Used inRWD45applicationno =70to 99)
40101 * SP1day IEEE754 SetPoint ofHeating 1 for Day
40103 * SP1night IEEE754 SetPoint ofHeating 1 for Night
40105 * SP1daysummer IEEE754 SetPoint ofHeating forSummerDay
(Used inRWD32/62/68/82, application no
=16, 26, 36, etc.& 17, 27, 37, etc.)
40107 * SP1nightsummer IEEE754 SetPoint ofHeating forSummerNight
(Used inRWD32/62/68/82, application no
=16, 26,36,etc. &17,27,37,etc.)
40109 * SP1daywinter IEEE754 SetPoint ofHeating forWinter Day
(Used inRWD32/62/68/82, application no
=16, 26,36,etc. &17,27,37,etc.)
40111 * SP1nightwinter IEEE754 SetPoint ofHeating forWinter Night
(Used inRWD32/62/68/82, application no
=16, 26,36,etc. &17,27,37,etc.)
40113 * SP2day IEEE754 SetPoint ofHeating 2 for Day
40115 * SP2night IEEE754 SetPoint ofHeating 2 for Night
40117 * SP3day IEEE754 SetPoint ofCooling 1 for Day
40119 * SP3night IEEE754 SetPoint ofCooling 1 for Night
40121 * SP4day IEEE754 SetPoint ofCooling 2 for Day
40123 * SP4night IEEE754 SetPoint ofCooling 2 for Night
40125 Swpoint IEEE754 Q1On Set Point in%oftotal SD (Q1+Q2)
40127 T1 IEEE754 Minimum SwitchOffTime for Q1
40129 T3 IEEE754 Minimum SwitchOffTime for Q2
40131 Tcyc IEEE754 Time of Cycle and Delay
(Tdelayisa functionof Tcyc)
40133 Tn_Ind IEEE754 I_action Time for indY
40135 Tn1 IEEE754 I_action Time for Heating1
40137 Tn1_cas IEEE754 I_action Time for CascadeHeating 1
40139 Tn3 IEEE754 I_action Time for Cooling 1
40141 Tn3_cas IEEE754 I_action Time for CascadeCooling1
40143 - - Not used
40145 * XDZ_AppA IEEE754 Dead Zone for,
RWD62application no =31
RWD32/82application no =41
RWD68application no =41&51
40147 * XDZ_C1 IEEE754 Offset for C1
40149 * XDZ_C2 IEEE754 Offset for C2
40151 * XDZ_C3 IEEE754 Offset for C3
40153 SD1_RWD68 IEEE754 SD1for RWD68 inapplication no =45&55
40155 * XDZ_H2 IEEE754 Offset for H2