Example for Calculating Display Energy from modbus Energy Counters:
Energy unit/resolution on modbus register 46021 is set to 2 (ie. It will measure energy in kWh).
Overflow count (OF) value on modbus register 30109 for watt Import is 25.
Energy main counter (M) value on modbus register 30111 for watt import is 2587413.189
Energy digit reset count (EDRC) set by user in modbus register 46023 is 8.
Then,
Total Energy = 25 x 10^(8) + 2587413.189
= 2500000000 + 2587413.189
= 2502587413.189 kWh
Therefore Energy shown on display will be:
= 2502587.41 MWh
As maximum number of digits for displaying energy present on display is 9 and the value of Total Energy in
above example exceeds 9 counts so Energy in kWh is converted to MWh for displaying as shown above.
Note: As maximum energy shown on the display is XXXXXXXXX (9 Count) MWh so if count of above
calculation for Total energy exceeds XXXXXXXXX (9 Count) MWh then the display will show “----oF---” with
unit MWh that indicates display energy has overflown. This condition will only get reset if the Total Energy
Count gets reset.
Overflow count (OF) on modbus will reset to 0 if it exceeds 99999999 in case of Wh resolution, 99999 in case
of kWh resolution & 99 in case of MWh resolution.
80
To Next Page
Loading...