Hello!

I met some issues with ModBus RTU RS-485 on my S7-1200 CB1241 with 12 slaves. After 5-8 hours of normal work Modbus cycle freezes. I suppose mistake in my Modbus sequence, but can not get it.

And one more question: is it possible to restart/reload/run-stop modbus_master/cpu if I detect freeze? For example value of variables dont change about 5 sec or something like this?

Please help me.

Thank you.