Power factor register format
Power factor in IEC and lead/lag (IEEE) formats: Float32 and Int16U registers
The meter provides total power factor in IEC and lead/lag (IEEE) formats in both Float32 and Int16U data types. You can use these registers to bring power factor information into third-party software. These registers are interpreted using the standard IEC and IEEE sign conventions.
Four quadrant power factor information: floating point registers
The meter also provides PF information (including sign and quadrant) in single floating point registers for each of the PF values (for example, per-phase and total values for true and displacement PF, and associated minimums and maximums). The meter performs a simple algorithm to the PF value then stores it in the appropriate PF register.
The PF value is calculated from the PF register value using the following formulas:
|Quadrant||PF range||PF register range||PF formula|
|Quadrant 1||0 to +1||0 to +1||PF value = PF register value|
|Quadrant 2||-1 to 0||-1 to 0||PF value = PF register value|
|Quadrant 3||0 to -1||-2 to -1||PF value = (-2) - (PF register value)|
|Quadrant 4||+1 to 0||+1 to +2||PF value = (+2) - (PF register value)|
Go to www.se.com and search for your meter’s Modbus register list to download a copy.