Microchip Technology ARD00342 User Manual
Calculation Engine and Register Description
© 2012 Microchip Technology Inc.
DS51968A-page 19
3.3
MODE
The MODE register controls the operation of the energy meter. The bit functions are
defined by the table below.
defined by the table below.
16
R/W Active Energy Pulse Output correction factor
16
R/W Power Up Configuration Register
16
R/W Calibration Status
16
R/W Maximum current of the meter (I
MAX
)
16
R/W Calibration Voltage of the meter (V
CAL
)
16
R/W Calibration Current of the meter (I
CAL
)
16
R/W Calibration Frequency of the meter
16
R/W Meter Constant in imp/kWh or imp/kVARh
16
R/W Number of line cycles for calibration
8
R/W Reactive Energy Pulse Output correction factor
16
R/W Reactive Energy Pulse Output correction factor
8
R/W Phase delay for Reactive Power
8
R/W No Load threshold time (minutes)
8
R/W No Load threshold time (seconds)
ENERGY_ACT
32
R/W Active Energy
ENERGY_REACT
32
R/W Reactive Energy
TABLE 3-1:
INTERNAL REGISTER SUMMARY (CONTINUED)
Name
Bits R/W
Description
REGISTER 3-1:
MODE REGISTER
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
—
CF
ABSOLUTE
PHASE
CREEP
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-4
Unimplemented: Read as ‘0’.
bit 3
CF: Active Energy CF Phase Enable bit
1
=
Bit = 1 Phase is enabled to be accumulated into the total energy registers or CF pulse output
0
=
Bit = 0 Phase is DISABLED and is not accumulated into the total energy registers or CF pulse
output
bit 2
ABSOLUTE Positive Only Energy Accumulation Mode bit
1
=
Bit = 1 Positive energy only
0
=
Bit = 0 Both negative and positive energy accumulated (negative energy is subtracted)
bit 1
PHASE: Phase bit
1
=
Single-Point Phase Correction
0
=
Multi-Point Phase Correction (future)
bit 0
CREEP: No-Load Threshold bit
1
=
Enabled
0
= Disabled