SuperSigma2 AM PMS – V1.5.6 17-1-2020 Page 68 (97) ©2019 DMC GmbH Herten Germany
6.4 Auto tuning errors
It is possible that the auto tuning algorithm has encountered an error. This list provides the possible errors during auto
tuning, together with a short description which might be helpful for solving them.
No errors in the Auto tuning Motor Module
The rated battery voltage set is not consistence with the measured one and auto tuning cannot be performed
Solution: Set a proper number in “M4-7 Battery Voltage”.
The battery is too low and auto tuning cannot be performed
Solution: Check power connections (+ and B+), check battery state of charge, check line contactor wiring.
An overcurrent is detected (maybe short circuit or wrong wiring)
No current is flowing in the motor: no or wrong motor connection.
No Sensor feedback reading: it means no sensor is connected or that the motor is locked
Solution: check for the sensor supply voltage setting being correct, check sensor wiring and check if the motor
is free to spin.
Error in speed measurement (only for Sin/Cos): direction measured is not consistent with motor direction
Solution: if motor spins in forward direction during autotuning change “M4-5 Reverse sensor reading”.
if motor spins in reverse direction during autotuning change “M4-6 Reverse motor direction”.
Wrong number of poles set in “M4-1 Number of motor poles” (only for Sin/Cos)
Unable to finish calculation (rotor resistance too low or too high)
Unable to finish motor measurements
Probably causes:
1) Motor is loaded: remove mechanical load
2) Nominal current it is set to low: increase “M4-8RMS motor current For tuning”
3) Motor inductance is too low
Sine/Cosine signal is not detected: check wiring or Sensor Supply “M4-3 Sensor supply voltage”.
Sine signal is not in the same range as the cosine signal: check wiring and sensor
Cosine signal is not in the same range as the sine signal: check wiring and sensor
Sine/Cosine signals are in range but very different: Check sensor mechanical alignment and wiring.
One of the three Hall sensor signal is missing.
Two of the three Hall sensor signals are missing.
All hall sensors signals are missing
Hall sensor configuration incorrect.
Probably causes :
1) the motor is loaded
2) sensors wrong wiring
3) Nominal current is set too low: increase “M4-8RMS motor current For tuning”
Unable to calculate the PI gains: Perform auto tuning again starting from default values (if Autotune type 1 has
been chosen), Check Ke and Lph-ph values.
Motor calculated maximum speed exceeds 500Hz: Refer to DMC
Unable to calculate limit curves. Check motor parameters (Fmotmax, I demag) in the auto tuning menu
Unable to Measure Ke (e.m.f. constant). Check if motor is loaded or locked. If not reduce the speed control PI
gains in “Motor Setup” Menu.
An unknown error occurred: Refer to DMC
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