Decision Tree: Communication / DCS
Goal: restore stable updates to DCS/PLC (values + quality + timing).
1) Confirm analyzer is running and last analysis time updates.
2) Verify network basics: link lights, IP/subnet/gateway, ping test.
3) Confirm protocol settings match DCS (Modbus/OPC/etc.).
4) Verify mapping/scaling/data types and quality/status mapping.
5) Align polling interval with GC cycle time (avoid timeouts).