MeterValues missing during session

How it presents

Symptom

MeterValues missing during session — energy runs locally but CSMS billing/telemetry shows gaps or zero MeterValues. protocol field note: keep evidence scrubbed and prove the ranked cause before module RMA on OCPP-F05.

Root causes (by observed frequency)

1. #1 MeterValues sample interval misconfigured or disabled

   Config before hardware

2. #2 Meter/register communication loss inside the cabinet
3. #3 CSMS rejecting MeterValues (clock/format)
4. #4 Websocket congestion dropping measurands under load

Diagnostic procedure

1. 1. Check GetConfiguration for MeterValue sample intervals

   Expected: Non-zero sensible interval

   Tools: CSMS

2. 2. Compare local session kWh vs CSMS MeterValues

   Expected: Gap vs match

   Tools: HMI/CSMS

3. 3. Inspect meter comms/alarms on OEM service menu

   Expected: Meter online

   Tools: OEM tool

4. 4. Verify clock skew not invalidating measurands

   Expected: Time OK

   Tools: HMI

5. 5. Repair meter harness or OEM meter only after config proven

   Tools: OEM

The fix

Missing MeterValues is config/meter-comms/CSMS accept — prove before energy-meter RMA.

1. Restore MeterValues configuration before replacing meters.
2. Fix cabinet meter communications if the OEM menu shows loss.
3. Correct clock/format issues rejected by CSMS. Document readings and scrubbed photos for OCPP-F05 before closing the ticket.
4. Stabilize backhaul if drops only appear under multi-stall load.
5. Validate a session with continuous MeterValues in CSMS.