- RS485 Collision issue: a node is remaining in transmission state:
- Measure the A+-common, and B—Common voltage ( should be around 2.5Vdc each leg) for all units;
- Isolate each panel from the BUS before measuring;
- Measure the A+-common, and B—Common voltage ( should be around 2.5Vdc each leg) for all units;
Once you determine the faulty panel, upgrade the firmware to the panel. Use direct USB connection to the panel for firmware upgrade after recycling the power. Then put the panel back online. Ensure that the panel is properly grounded.
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