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M’Ax Advanced User Guide 36
Issue Number: 4 www.controltechniques.com
Voltage across the internal DC Bus Voltage.
This value is read from the SLM. The value is used is for current limit (refer to symmetrical current limit, parameter 4.07) and motor thermal
protection (refer to thermal time constant, parameter 4.15).
This value is set by the motor manufacturer and stored in the SLM. On power up the value set in the motor object is read by the drive and
stored in parameter 5.08.
TheratedvoltageiscalculatedfromtheKe and rated rpm of the motor.
This parameter is read from the SLM and is set to the number of poles of the motor being used.
The drive can automatically measure the phase angle between the rotor flux and the encoder position by performing a phasing test.
Parameter 5.12 will return to zero on completing the flux alignment test. The value of the encoder phase position is stored in SLM and
indicated by parameter [3.25].
Flux Alignment
Use this procedure only in exceptional circumstances; do not use it when setting up the drive.
1. Disconnect the load from the motor.
2. Ensure the Hardware enable contact is open.
3. If a RUN contact is connected, ensure that it is open.
4. Apply the AC supply (or auxiliary back-up supply) to the drive.
5. Ensure parameter 6.08 Hold zero speed select is set at 0.
6. Close the Hardware enable contact.
7. Check that the display shows rdY, or that parameter 0.01 is set at 0.
8. Set 5.12 Flux alignment test enable at 1. When the test is completed, 5.12 automatically returns to 0.
9. Re-enter the required settings into the appropriate parameters.
10. Remove the AC supply or auxiliary back-up supply; the new flux-alignment value is automatically stored in the SLM.
The Kt value is read from the SLM. The drive requires this information to calculate the correct speed controller gains.
This parameter is read from the SLM. The unit used in the displayed value is dependent on the value in parameter 5.34.
0-Kgm
2
1-Kgcm
2
This parameter is read from the SLM.
5.05 DC-bus voltage
ô
0 ~ 1000
ð
VROUni P0.43
5.07 Motor - rated current
ô
0~FLC
ð
SLM A RO Uni 0.19
5.08 Motor - rated speed
ô
0 ~ 7500
ð
SLM rpm RO Uni
5.09 Motor - rated voltage
ô
0~V
s
ð
SLM V RO Uni
5.11 Motor - number of poles
ô
0~255
ð
SLM RO Uni
5.12 Flux alignment test enable
ô
0~1
ð
0 RW Bit
5.32 Motor - torque constant
ô
0.00 ~ 500.00
ð
SLM Nm/A RO Uni
5.33 Motor inertia
ô
0.1 ~ 6000.0
0.00001 ~ 0.6
ð
SLM
Kgcm
2
Kgm
2
RO Uni
5.34 Inertia units selected
ô
0~1
ð
SLM RO Bit 0.11
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