Check communication with Modbus TCP Slave

[pawel_kowalski_]

Hi,

How I can get information about no communication with Modbus TCP slave (1)?
I want that signal to add red crosses on HMI informing that the displayed variables are not up to date.

I using Machine Expert V2.1 and TM251MESE

[LeTomas · Accepted solution]

HI @pawel_kowalski_ ,

In Machine Expert if you are using the Ioscanner you can check the Healthbits like this

You can always have a bit blinking on the PLC side and if it does not change the value you can trigger an alarm in the HMI or use a variables that in increasing his value.

If you want to avoid this you can create a variable in the HMI that checks the statistic of the communication using the address "@sys:2" if you get the 1 it means no connection to the device.

I hope this can help you and if this solves the problem remember to put the comment as solution 🙂

Best regards,

LeTomas

[pawel_kowalski_]

Hi,

Thanks, @LeTomas  for the answer, I used the method with Healthbits, and that is great for me 👍.