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Communication Beckhoff Trouble
AT doesn't see PLC


I`m starting with programing Beckhoff PLC.
I'm using Beckhoff CX1010-0011 and I have installed TwinCAT 2.

When I'm trying to Add Route in TwinCAT System Manager it doesn't see any PLC device and ther is no possibility to connect with PLC.

I was trying to connect with PLC by name or MAC addres but my computer doesn't see PLC(I was trying diffrent programs like IP Scanner to find it in network). But the LAN Led Status light is green.

If somebody can help this would be very nice

Are all devices on same switch/LAN segment?