What does error id 15 represent in the KM-ASSYM5-10 module?

What is the communication connection between M84-PLC1 and PLC2 meant to be interrupted?

Why did the communication connection interruption occur?

What is the M
The solution for the error described as "The communication connection between M84-PLC1 and PLC2 is interrupted" may involve checking the communication protocols, ensuring proper termination of the connection, checking the modems and communication cards,