Send Modbus variables from M241 using Modbus RTU(Serial1) to HMI GTU3

pawel_kowalski_ · ‎2025-02-02

Hi.

I have to connect the HMI panel to the M241 controller via Modbus RTU but I don't know exactly how to do it, somewhere I only came across this article:
https://www.se.com/es/es/faqs/FAQ000235536/

I always made the connection between the PLC and HMI via Modbus TCP using Symbol Configuration, unfortunately here I have to use Modbus RTU.

Please help me how to make such a connection.

LeTomas · ‎2025-02-02

Hi @pawel_kowalski_

You can try the next video if you are using EcoStruxure Operator Terminal Expert:

https://youtu.be/SzqOc416OmI

If you are using Vijeo Designer then you can try the excel file attached to import in the software the variables.

(note: this excel has been done in 2014 and it only works for a few variables type, you must assign an address to each variable)

Best regards,

pawel_kowalski_ · ‎2025-02-09

Hi.

@LeTomas thank you for the tip. I almost achieved what I wanted, currently I have a problem reading bits.
I have made a program to map variables to Modbus registers and I can read word registers which in my case have the range %MW2000-%MW2061. However, I cannot read registers with bit values which in my case have the range %MX3001.0 - %MX3009.1.

I have no errors during the build.
I am sending a list of registers in the attachment.

LeTomas · ‎2025-02-10

Hi @pawel_kowalski_ ,

Check the next video related to addressing, in Vijeo Designer you still need to access to the %MW:

https://youtu.be/xsS_JNg-5MM

Best regards,