台达PLC通信协议.docx
- 文档编号:441352
- 上传时间:2022-10-10
- 格式:DOCX
- 页数:20
- 大小:27.83KB
台达PLC通信协议.docx
《台达PLC通信协议.docx》由会员分享,可在线阅读,更多相关《台达PLC通信协议.docx(20页珍藏版)》请在冰豆网上搜索。
台达PLC通信协议
DELTADVPSeriesPLC
COMMUNICATIONPROTOCOLVER1.0
1.CommunicationInterface:
RS-232C
2.CommunicationProtocolASCIImode,9600(Baudrate),EVEN(Parity),1(Startbit),1(Stopbit)
3.CommunicationDataFrame
STX
Startcharacter‘:
’(3AH)
ADR1
Communicationaddress:
ADR0
8-bitaddressconsistsof2ASCIIcodes
CMD1
Commandcode:
CMD0
8-bitcommandconsistsof2ASCIIcodes
DATA(0)
Contentsofdata:
DATA
(1)
n8-bitdataconsistof2nASCIIcodes.
……….
n37,maximumof74ASCIIcodes
DATA(n-1)
LRCCHK1
LRCchecksum:
LRCCHK0
8-bitchecksumconsistsof2ASCIIcodes
END1
Endcharacter:
END0
END1=CR(0DH),END0=LF(0AH)
⏹ADR(CommunicationAddress)
Validcommunicationaddressesareintherangeof0…31.Communicationaddressequalsto0meansbroadcasttoallPLC,thePLCwillreplynormalmessagetothemasterdevice.
Forexample,communicationtoPLCwithaddress16decimal:
(ADR1,ADR0)=’1’,’0’’1’=31H,‘0’=30H
⏹CMD(Commandcode)andDATA(datacharacters)
Theformatofdatacharactersdependsonthecommandcode.Forexample,readingcontinuous8wordsformstartingdeviceaddress0614HofPLCwithaddress01H.
FieldName
Example(Hex)
Heading
3A
SlaveAddress
01
Commandcode
03
StartingAddressHi
06
StartingAddressLo
14
NumberofPointsHi
00
NumberofPointsLo
08
ErrorCheck(LRC)
DA
NumberofPoints(max)
=18(for16bitregister)
=9(for32bitregister)
Example:
ReadingCoilsT20~T27fromslavedevice01
PC→PLC
“:
010306140008DACRLF”
PLC→PC
“:
01031000010002000300040005000600070008B8CRLF”
FieldName
Example(Hex)
SlaveAddress
01
Commandcode
03
BytesCount
10
DataHi(T20)
00
DataLo(T20)
01
DataHi(T21)
00
DataLo(T21)
02
DataHi(T22)
00
DataLo(T22)
03
DataHi(T23)
00
DataLo(T23)
04
DataHi(T24)
00
DataLo(T24)
05
DataHi(T25)
00
DataLo(T25)
06
DataHi(T26)
00
DataLo(T26)
07
DataHi(T27)
00
DataLo(T27)
08
ErrorCheck(LRC)
C8
⏹LRCCHK(checksum)
LRC(LongitudinalRedundancyCheck)iscalculatedbysummingup,module256,thevaluesofthebytesfromADR1tolastdatacharacterthencalculatingthehexadecimalrepresentationofthe2’s-complementnegationofthesum.
Forexample,reading1wordformaddress0401HofthePLCwithaddress01H
STX
‘:
’
ADR1
‘0’
ADR0
‘1’
CMD1
‘0’
CMD0
‘3’
Startingdataaddress
‘0’
‘4’
‘0’
‘1’
Numberofdata
‘0’
‘0’
‘0’
‘1’
LRCCHK1
‘F’
LRCCHK0
‘6’
END1
CR
END0
LF
01H+03H+04H+01H+00+01H=0AH
the2’s-complementnegationof0AHisF6H
Exceptionresponse:
ThePLCisbeenexpectedtoreturnanormalresponseafterreceivingcommandmessagesfromthemasterdevice.Thefollowingdepictstheconditionsthatnonormalresponseisrepliedtothemasterdevice.
ThePLCdoesnotreceivethemessagesduetoacommunicationerror;thusthePLChasnoresponse.Themasterdevicewilleventuallyprocessatimeoutcondition.
ThePLCreceivesthemessageswithoutacommunicationerror,butcannothandleit,anexceptionresponsewillreturntothemasterdevice.Intheexceptionresponse,themostsignificantbitoftheoriginalcommandcodeissetto1,andanexceptioncodeexplainstheconditionthatcausedtheexceptionisreturned.
Anexampleofexceptionresponseofcommandcode01Handexception02H:
Commandmessage:
FieldName
Example(Hex)
Heading
3A
SlaveAddress
01
Function
01
StartingAddressHi
04
StartingAddressLo
00
NumberofPointsHi
00
NumberofPointsLo
10
ErrorCheck(LRC)
EA
Responsemessage:
FieldName
Example(Hex)
Heading
3A
SlaveAddress
01
Function
81
ExceptionCode
02
ErrorCheck(LRC)
7C
Exceptioncode:
Meaning:
01
Illegalcommandcode:
ThecommandcodereceivedinthecommandmessageisnotavailableforthePLC.
02
Illegaldeviceaddress:
ThedeviceaddressreceivedinthecommandmessageisnotavailableforthePLC.
03
Illegaldevicevalue:
ThedevicevaluereceivedinthecommandmessageisnotavailableforthePLC.
07
CheckSumError
CheckifthecheckSumiscorrect
Illegalcommandmessages
Thecommandmessageistooshort.
Commandmessagelengthisoutofrange.
◆
Theformatofdatacharactersdependsonthecommand.Theavailablecommandcodesaredescribedasfollowed,
Code
Name
Description
01
ReadCoilStatus
S,Y,M,T,C
02
ReadInputStatus
S,X,Y,M,T,C
03
ReadHoldingRegisters
T,C,D
05
ForceSingleCoil
S,Y,M,T,C
06
PresetSingleRegister
T,C,D
15
ForceMultipleCoils
S,Y,M,T,C
16
PresetMultipleRegister
T,C,D
17
ReportSlaveID
None
DELTADVP-ESSeriesPLCDEVICEADDRESS
Device
Range
EffectiveRange
Address
S
000~255
000~127
0000~00FF
S
256~511
0100~01FF
S
512~767
0200~02FF
S
768~1023
0300~03FF
X
000~377(Octal)
000~177(Octal)
0400~04FF
Y
000~3
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- PLC 通信协议