How to correct Power Factor (PF) value sign on the PM8000, if the display and the Modbus register read different sign?

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Issue
It happens that the PM8000 meter display and the ION Setup software show a positive power factor (PF) LAG (e.g.: 99.79 LAG) but the Modbus Tester Tool as well as 3^rd the party software like the Wonderware software re a negative power factor (e.g.: – 99.79) from the Modbus registers (403150-403151) Float32.

Product Line

PM5000 series meter
PM8000 series meter
ION9000 series meter

Environment
Installation setup

Cause
The PM8000 was set to standard IEC, whereas the 3^rd party software was on standard IEEE.

Resolution
Conventionally for the power factor (PF), the PM8000 meter is compatible to two standards IEEE or IEC. According to the type of the load monitoring the sign of the power factor depends on the quadrant and load to monitor. Therefore, reading 99.79 LAG shows that the load monitoring is inductive and on quadrant 1 where the PF is positive for IEC and negative for IEEE.
For resolution, use the display or ION Setup to change the standard as the following:

Under Display -> Screen Setup.
ION Setup -> Setup Assistance -> Displays -> Localization -> PM1 PF Sign Convention -> Edit then change the Standard from IEEE to IEC.

Please see linked below for the PM8000 user guide on pages 19, 108 and 186, on the PM5000 see the user guide pages 42-43 and 170-171, and on ION9000 see user guide pages 20, 116, 213.