Rockwell Automation 1336T Master/Slave Parallel AC Drv - Manual (Page 48)

1336 FORCE-5.19 – August, 2000
5-2 Encoderless Operation
◗ Torque regulation (+/-5%) is comparable with encoderless and
encoder at velocities greater than approximately 25% of base
speed. At lower speeds encoderless torque regulation may
degrade with changing motor temperature.
◗ Torque response is comparable with both encoderless and
encoder (200 Hz).
Parameter Settings Required parameter settings that are unique to Master/Slave
Encoderless Operation are:
Master Drive:
1. Parameter 223, Precharge/Ridethru Selection, bit 7 set = 1 (M/S
encoderless enable).
2. Parameter 285, Test DAC1 = 74.
3. Parameter 88, VP Fault/Warning Configuration Selection
Bit 0 set = 0, to disable the Encoder Feedback loss fault
Bit 5 set = 0, to disable the “motor stalled” fault
4. Parameter 150, Feedback Device Type = 5, (Encoderless
velocity estimate with deadband). This should provide a speed
range of about 60:1. If a larger speed range is needed, selecting
Type = 7, (Encoderless without deadband and low bandwidth)
could be considered.
Slave Drive:
1. Parameter 223, Precharge/Ridethru Selection, bit 7 set = 1 (M/S
encoderless enable).
2. Parameter 88, VP Fault/Warning Configuration Selection
Bit 0 set = 0, to disable the Encoder Feedback loss fault
Bit 5 set = 0, to disable the “motor stalled” fault
3. Parameter 150 = 0 (Encoder Feedback Operation)