UniLogic Software
Receive and share information about UniLogic, the application software for the UniStream control platform
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How far is PLC from your office? -
@kratmel, My first answer is for your case.
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@Ivan Rustic It looks that with a number of VFDs > 5 noise level is big. Than IO BUS emitted noise make communication not stable. During number of seconds errors' number is rapidly growing and communication is not reliable. You have to draw and show for community wiring of: - Ground and Power Supply 0V, include all 0V connection points (include VFD connections). - How VFD are distributed/installed (distance, ground connections). - The same for +24V lines. - What cable used for communication. - If schielded - how schield at each side is connected. - Are VFDs located at the same enclosure as PLC. - Did wiring applied in accordance to VFDs; viring guide - part of guide related to installation in proximity of PLC. - Vhat are VFD models? Experienced Forum members may ask you more questions.
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Do you try to connect PLC power suply 0V wire to ground for test? -
By Ivan Ristic · Posted
Hello again. I just upgraded firmware for all (CPU, IO, FPGA and panel) but problem is still present. When I select 6 or more VFD devices for running, the moment I start motors, all IO module lamps start randomly flashing between green and red and there is message on the screen which I attached in first post.
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