PLC Connect Modbus TCP to 800xA word order problem
We are currently connecting some PLCs to our 800xA DCS system using PLC connect and we seem to be facing an unusual problem when reading and writing real values to the PLC.
We set up the Modbus TCP driver and adressed the REAL type variables with the address format HRAxxxx,REAL. This works perfectly fine when reading values from the PLC.
On the other hand, when trying to write to the PLC the word order of the REAL variable is switched. So if you write the number 66 for example, the number 2.386131e-041 is written, because the first word and the second word were written in the wrong order.
Effectively PLC connect is using one word order to read real numbres and another to write them.
Has anybody had this problem?
Thanks in advance!
I install System 800xA and PLCConnect from "3BSE061980R5144 System Software. For new installation" media. In PLCConnect VersionInfo file:
System 800xA 5.1
PLC Connect 5.1.0-4
Build Id 5.1.400.2
In Log file:
Successfully loaded ABB PLC Connect 5.1-0 (build 400002).
The same problem.
Which version I have?