ABB Zenon Modbus TCP 64bit double data type comm.
Hi Everyone,
I have a slave device that Modbus TCP/IP communication to ABB Zenon. Slave sending 64bit double data type to ABB Zenon SCADA. I tried LREAL and REAL data type with driver object type holding register,holding register Double(64bit), holding register float communication okey but data is incorrect. this data must be format [ABCDE.FGH].
I checked modbus adress with modbuspoll this is be fine.
I am using ABB Zenon 7.60 with 'Modbus RTU and Open Modbus TCP' driver .
IP : 172.16.1.20
Net Adress: 1
starting offset : 10005
Have you experience modbus tcp double data type communication to ABB Zenon?
Thank you,
Best Regards.
I have a slave device that Modbus TCP/IP communication to ABB Zenon. Slave sending 64bit double data type to ABB Zenon SCADA. I tried LREAL and REAL data type with driver object type holding register,holding register Double(64bit), holding register float communication okey but data is incorrect. this data must be format [ABCDE.FGH].
I checked modbus adress with modbuspoll this is be fine.
I am using ABB Zenon 7.60 with 'Modbus RTU and Open Modbus TCP' driver .
IP : 172.16.1.20
Net Adress: 1
starting offset : 10005
Have you experience modbus tcp double data type communication to ABB Zenon?
Thank you,
Best Regards.
Asked 6 months ago
Answers
0
May I know what was the value you have received and what it is suppose to be? If possible can you share the Modbus Send & Receive frame packets to confirm the value received.
I suspect word/byte order could be an issue, so you can play around or try different word/byte order combinations.
Answered 6 months ago
0
Hi -
I think this is an issue of byte order format supported by your device. You can try changing the byte order for float from "Big Endian" to "Little Endian".
I think this is an issue of byte order format supported by your device. You can try changing the byte order for float from "Big Endian" to "Little Endian".
Answered 6 months ago
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