Netword Error Detected

[remy]

Hello I use a unilogic 1.30.58 and i have a problem, my plc freeze with the text Network Error Detected i have lot of message and i dont understand what is that in the plant i have 8 Altivar, 3 weidmuller coupler and other equipement in functionned in Modbus and ethernet IP.

All equipement is plug on 3 spider hub .

The plant functionne since one years

 

Can you help me and explain this problem ?

 

Thanks for you answer

 

[kratmel]

Please discribe problem history:

- time since system started?

- is it this issue happend  from plant start?

- time of normal work from plant start or from current job start?

- is it possible to test IP and modbus  networks separately?

- what power supply is used?

- is it possible that this issue happend when one of new machine part installed or some changes to program happend?

- is it PLC battery in good condition?

- is it possible that some external network connected to plant PLC network?