Issue
It is possible to create a Logical Device and map a register from a meter that is the input to a Data Recorder on that meter, then create a second Logical Device that includes the same mapping, i.e. the same physical meter register is used in two different logical devices. If this is done, only one of the Logical Devices will include logged data from the mapped register.
Product Line
Power Monitoring Expert 7.2.2
Power Monitoring Expert 8.2
Power Monitoring Expert 9.0
Power Monitoring Expert 2020
Power Monitoring Expert 2021
Power Monitoring Expert 2022
Power Monitoring Expert 2023
Power Monitoring Expert 2024
Environment
Management Console
Cause
When this is done, two different entries are made in the IAS_MeasurementAddress SQL database table, but both point to the same underlying physical register originating from the device. If this is done, the logged data is only assigned to one of the Logical Devices, and which one gets the data seems to be random.
Resolution
PME 2020 and older:
The user should delete the Logical Device for which the logged data is not required.
PME 2021 and newer:
The system guide states the following:
When a logical device is configured, historical data for an output register (that is, an output measurement) on the physical device is automatically routed to the corresponding output measurement on the logical device.
When a logical device is configured, historical data is logged to the logical device and not the related physical device.
If multiple logical devices include the same input measurement from the same physical device, historical data from that input measurement is routed to the logical device that was configured last.
