How to get data from Modbus RTU devices which use 45xxxx-range address
Hello,
I want to use CI853 module to get data from a slave device which use 6-digit register address. The register address range of slave device's data is 45xxxx (see attachment).
As the guide of ABB document, the address range of FC3 (Read Holding Register) have to be 4xxxx.
What I need to do for CI853 module can "realize" the data from the Modbus slaves correctly?
Thank you!
I want to use CI853 module to get data from a slave device which use 6-digit register address. The register address range of slave device's data is 45xxxx (see attachment).
As the guide of ABB document, the address range of FC3 (Read Holding Register) have to be 4xxxx.
What I need to do for CI853 module can "realize" the data from the Modbus slaves correctly?
Thank you!
Asked 2 years ago
Answers
0
Hi,
Different producers create different "standard" Modbuss addressing. It is difficult for me to understand the meaning of 45xxx. Is that Modbus RTU?
My recommendation - you should try.
For example (each time when change start address in OnLine, should deactivate and activate again En input of corresponding Connect Block):
%MW10#11 (or %MW10#10) - start address for both 450011/12
%QW10#11 (or %QW10#10)
%IW10#11 (or %MW10#10) - even it is described as FC4
Try first to establish connection to the slave and read something. Then precize exactly the start address, according to the coding o the slave
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