Hello,
I am currently having issues with 7 PLC5's daisy chained via 1771 FA fiber optic converter modules with DH+ blue hose off those to the controller.
If I pull one dh+ connection, 1 fiber connection, or even power off the PLC, I lose all DH+ network comms to PLCs.
I understand if it is in the middle of the daisy chain. I would lose that and all down stream controllers. But I am starting with the last node. Only one fiber in to the 1771 FA module and a blue hose from there to controller.
Can't make much sense of this. All controllers have resistors. My node 0 has a S10:1 dh+ data table changed minor recoverable fault.
I'm trying to migration all PLC5's to contrologix. Wanted to start with this one as it's on the end of the daisy chain. But it kills the plant if I do. Same with all other controllers on DH+. Power off, remove fiber leg, remove dh+ port. All scenarios crash the network comm.
Any ideas on what this could be? AB support seems stumped as well.
Much appreciated!!
I am currently having issues with 7 PLC5's daisy chained via 1771 FA fiber optic converter modules with DH+ blue hose off those to the controller.
If I pull one dh+ connection, 1 fiber connection, or even power off the PLC, I lose all DH+ network comms to PLCs.
I understand if it is in the middle of the daisy chain. I would lose that and all down stream controllers. But I am starting with the last node. Only one fiber in to the 1771 FA module and a blue hose from there to controller.
Can't make much sense of this. All controllers have resistors. My node 0 has a S10:1 dh+ data table changed minor recoverable fault.
I'm trying to migration all PLC5's to contrologix. Wanted to start with this one as it's on the end of the daisy chain. But it kills the plant if I do. Same with all other controllers on DH+. Power off, remove fiber leg, remove dh+ port. All scenarios crash the network comm.
Any ideas on what this could be? AB support seems stumped as well.
Much appreciated!!