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Hi, I am trying to create a program for the 5U that can communicate to 2 or 3 VFDs (individual control, not broadcast) using the inverter commands (IVCK, IVDR, IVRD). My code was fine for the FX3u, but when converted to 5u and extra field is added for 3 monitoring M registers indicating if the line was executed and whether properly or not. We are looking at several written points to the drives and many monitored points (during different conditions). Unfortunately, I run into issues where the communications to the drives drop out. Has anyone successfully done this or know of a good reference? I've looked extensively and have not found one. The examples in the FX5 User's Manual Serial Communications manual are extremely basic and don't provide enough detail. Thanks, Steve
