MathiasPM
Member
Hello plctalk,
I am in the proces of integrating a Micro820 with the purpose of getting data out of 4 AB Powerflex 4M drives through Modbus Serial.
In the workshop the PLC works and is getting data out. At first glance, then i install the PLC at the site, it is also working and seems fine for a couple of hours. Afterwards, at some point, the communication stops working, and throwing out the errorcode 55 from the Msg_Modbus FB.
I am using the exact same modbus paramters in both the controller and the drives (19200 baud-rate, 8E1 and so on). The drives has the node addresses 2,4,6,8.
I cant seem to wrap my head around it. Could it be, that the serial port has shorted? Or are there anyone else who has encountered problems alike?
I would be happy if someone had anything to say about it.
TIA.
I am in the proces of integrating a Micro820 with the purpose of getting data out of 4 AB Powerflex 4M drives through Modbus Serial.
In the workshop the PLC works and is getting data out. At first glance, then i install the PLC at the site, it is also working and seems fine for a couple of hours. Afterwards, at some point, the communication stops working, and throwing out the errorcode 55 from the Msg_Modbus FB.
I am using the exact same modbus paramters in both the controller and the drives (19200 baud-rate, 8E1 and so on). The drives has the node addresses 2,4,6,8.
I cant seem to wrap my head around it. Could it be, that the serial port has shorted? Or are there anyone else who has encountered problems alike?
I would be happy if someone had anything to say about it.
TIA.