communication error

[[email protected]]

Hi all,
I am learning PLCS now and when we were to run the machine we are getting a lot of communication errors .Do any of you have suggestions.

 

[ArikBY]

I wish I had the ability to read peoples mindes,but I dont.
So be kind and give us some details.
PLC type.
Programming software.
Communication kind.
Problem description.

Then we will try to help.