Hello Everyone,

I am trying to connect Eaton Starters C441 with Modbus TCP.

I am using Modbus MB Client, but i can't connect.

Read Function Code 02 Holding Registers 2000

Write Function Code 16 Holding Registers 4000

Any suggestion.

Hello Eric Lépine;

There are many points missing if you need our help: what CPU are you using as modbus TCP clint, what version of sotware will you program it with, and which version of the C441Ethernet module will you use in this project?

One basic information that can be found in a general C441 manual is that the C441 follows the Modbus secifications, and that Function Code addresses Discrete coils, and Function 16 is used to write to multiple holding regisrters, Siemens modbus clients have a tendancy to support the same Function codes, 

https://www.eaton.com/content/dam/eaton/products/industrialcontrols-drives-automation-sensors/c441-motor-insight-motor-protection-relays/c441-ethernet-module-user-manual-mn04200002e.pdf

Please give us more information on your project so we are able to provide more detailed replies..

Hope this helps,

Daniel Chartier

Salut Eric, as-tu trouvé la réponse?

Hello K Si-Madmax