Decrease open loop acceleration A1 [OL_ACC_A1] and open loop acceleration A2 [OL_ACC_A2].
3.6.3 No Motor Fault [NO_MTR]
This fault gets triggered when the phase current is below No motor lock threshold % of base current.
Step 1: Make sure the motor phases are connected to J8.
Step 2: If the fault persists, set the No-Motor lock current threshold [NO_MTR_THR] to 0.005 V.
Step 3: For low inductance motors, increase PWM switching frequency [PWM_FREQ_OUT].
Step 4: Increase Min duty cycle [MIN_DUTY] during closed loop operation.
Please note that device might trigger Loss of sync [LOSS_OF_SYNC] when motor phases are disconnected
while the motor is spinning.
3.6.4 Cycle by cycle current limit [CBC_ILIMIT]
Cycle by cycle current limit [CBC_ILIMIT] gets triggered when the motor startup time is too low and the open
loop acceleration is too high.
If this fault gets triggered, it is recommended to increase Cycle by cycle current limit (ILIMIT).
Essential Controls
SLLU336 – MAY 2021
MCT8316A Tuning Guide
11
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