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Hello Everybody I have started an EIP communication between a Mitsubishi IQR plc and a Zebra ZT610. For this I use a RJ71EIP91 card for MITSUBISHI. And on the Zebra side I had the "Network Connect" driver installed. In the RJ71EIP91 card I put the ESD file. (attention I was obliged to modify this one and to put the communication in "point to point" (before it was multicast) I have a closed network (Zebra, PLC, PC) It works. I can print labels with tags that evolve in the PLC. The problem is that when I turn off the printer I have a lot of trouble reconnecting it to the PLC. When I run a slave scan with the "RJ71EIP91 TOOL" software, it no longer sees the printer, although I can ping it from this software and I can see it clearly. To regain communication I have to reset the zebra, or initialise the network parameters, or initialise with the factory parameters. It's really strange. I can't figure out what is making me regain communication. If I switch off the PLC or unplug the RJ45s and leave the Zebra switched on, I don't lose communication. Do you have any ideas to help me understand my problem? Thank you all for your help. Renaud