ElmoMC SimplIQ Digital Servo Drives-Bell Command Reference - Manual (Page 230)

The CA[27] parameter defines the maximum number of retries for the auto-phasing
process. If the process fails due to overload, the auto-phasing repeats, doubling the
current every iteration. If the peak current limit is reached during an attempt, the auto-
phasing process will stop.
4.3.1.5 Starting the Motor without Digital Hall Sensors
The following parameters are relevant to starting the motor when digital Hall sensors are
not used.
Parameter Description
CA[18]
CA[19]
Encoder resolution and number of motor pole pairs.
CA[18] must be greater than CA[19] * 256.
CA[20] Must be set to 0 to indicate that no Hall sensors are present.
CA[21] Must be set to 1 to indicate that an encoder is present.
CA[15] Set the oscillation frequency as explained previously.
CA[24] Set the minimum acceptable oscillation amplitude to 4.
CA[26] Set the excitation amplitude as a percentage of the continuous current.
CA[27] Set the maximum number of iterations for the auto-phasing process.
MO MO=1 sets the motor to on. If the motor starts to fail, MO resets to 0.
WS[15] Reads the actual oscillation amplitude.
WS[16] Flag if a auto –phasing failed because of suspected resonant frequency
near the excitation frequency.
SimplIQ for Steppers Application Note Commutation and Pole Identification
MAN-STECR (Ver. 1.1)
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