There seemed to be the occasional dropout to the other ML1400 (not shown) as well, but none to the PLC's on produced/consumed, and the ML1400 in the picture was definitely the main culprit. The ML1400 doesn't talk to anything else.Ībout 4 months ago, they started getting sporadic comms dropouts between the L71 and the ML1400.
The L71 also talks to one other ML1400 with more or less identical architecture, and about 5-6 CompactLogix/ControlLogix PLC's using produced/consumed tags, again with similar physical infrastructure. It's been in place and working fine for about 4 years.
The L71 uses explicit messaging to read and write to and from the ML1400.
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