3.1.20 Active Power Offset Register
The physical significance of POWER_OFFSET_P is total active energy (W-hour) offset per full cycle (20 ms for 50 Hz, 16.667 ms for 60 Hz).
POWER_OFFSET_P is stored in sQ1.30 format and is subtracted each full cycle.
POWER_OFFSET_P affects only P and P_F pulse generation and ACC_Tx pulse accumulators.
If the power offset to be compensated is 0.25 mWh/cycle, the value to be written in the register is:
POWER_OFFSET_P = round [0.25 / 1000 * 230] = 268435 = 0x00041893.
0.25 mWh/cycle corresponds to an active power of 0.25 / 1000 * 50 * 3600 = 45W (at 50 Hz).
Refer to the “PIC32CXMTx Metrology User Guide” (DS50003460) for a more detailed description.
| Name: | POWER_OFFSET_P |
| Property: | Read-Write |
This value indicates the active power offset of appointed pulse.
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| POWER_OFFSET_P[31:24] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| POWER_OFFSET_P[23:16] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| POWER_OFFSET_P[15:8] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| POWER_OFFSET_P[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |