Datasheet
STPMC1 Theory of operation
Doc ID 15728 Rev 7 35/77
APL = 1:
MOP/MON provides stepper motor driving signals from 3-phase active energy wide band
register with frequency CM related to C (number of pulses on LED pin, see par.
9.11
)
according to
Tabl e 2 0
.
LED pin provides 3-phase energy pulses according to
Tabl e 1 9
with frequency C not related
to KMOT
.
9.13 Driving a stepper motor - standalone operating mode
(configuration bits: APL
, LVS, KMOT)
When used in standalone mode (APL[1] = 1), the STPMC1 is able to directly drive a stepper
motor.
Table 18. LED pin configuration for APL
= 0
LVS (1 bit) FUND (1 bit) KMOT (2 bits) LED energy output Phase Freq
00
0
Active energy wide band P
3-ph
C
(1)
1R
2S
3T
01
0
Active energy fundamental F
3-ph
C
1R
2S
3T
10
0
Reactive energy wide band Q
3-ph
C
1R
2S
3T
11
0
Reactive energy fundamental R
3-ph
C
1R
2S
3T
1. C is the number of pulses per kWh set with calibration.
Table 19. LED pin configuration for APL = 1
LVS (1 bit) FUND (1 bit) LED energy output Phase Freq
0 0 Active energy wide band P
3-ph C
0 1 Active energy fundamental F
1 0 Reactive energy wide band Q
1 1 Reactive energy fundamental R