When you build your own Grafana panel, you query the historicValues table for a signal_name. If the name does not match, the panel stays empty — with no error. This page lists the names as they actually appear in the database on a GMN edge.

Measured values

These ten signals hold a number:

Signal name	Quantity
VibVeloXDirection	Effective vibration velocity, X axis
VibVeloYDirection	Effective vibration velocity, Y axis
VibVeloZDirection	Effective vibration velocity, Z axis
TempBearing1 … TempBearing4	Bearing temperatures 1 to 4
TempCoolantInlet	Coolant inlet temperature
RotSpeed	Rotational speed
operatingHours	Operating time as a raw counter, not in hours

Two names cause most of the trouble:

• Rotational speed is RotSpeed, not Speed. A query for Speed returns nothing and looks exactly like a machine without a speed signal.
• operatingHours counts in steps of roughly a tenth of a second. The DataStore tile converts it to hours using the device constant from the IODD; in your own query you have to do that yourself.

Status signals

Most measured values have a companion signal with a Status suffix (RotSpeedStatus, TempBearing1Status, …), plus DeviceStatus, ClampingStatus, DisplacementStatus, DisplacementTempStatus, DrawbarPositionStatus, HydraulicPiston and ReleaseStroke.

These hold an object, not a number. That is why every query of your own needs the line

AND jsonb_typeof(hv.value) = 'number'

Without it the query aborts as soon as one such value falls into the selection — invalid input syntax for type double precision.

Histogram classes

The remaining 51 signals (wearEdge…, wearTime…) are the classes of the dwell-time histograms, numbered per axis. The histogram tiles evaluate them; they are not meant for time-series panels of your own.

Matching the machine

Every signal hangs off the imported IDEA-4S machine, whose id is not fixed — it changes when the machine is created again. Query it rather than writing a number:

WHERE hv.machine_id = (SELECT id FROM "machines"
                       WHERE import_type = 'idea4s' ORDER BY id LIMIT 1)

ORDER BY id LIMIT 1 is not decoration: with more than one IDEA-4S machine in the DataStore — after a re-import, say — the query fails without it.