Siemens SINAMICS S110 List Manual page 281

p1990 Encoder adjustment, determine angular commutation offset / Enc_adj det ang
SERVO_S110-CAN, Can be changed: U, T
SERVO_S110-DP,
Data type: Integer16
SERVO_S110-PN
P-Group: Motor identification
Not for motor type: -
Min
0
Description: This function is only required for synchronous motors and can be started when commissioning for the first time or
after replacing an encoder. The function acts on the active motor data set.
When adjusting the encoder, the angular commutation offset is determined and transferred into p0431. Alarm
A07971 is output while the angular commutation offset is being determined. p1990 is automatically set to 0 after the
angular commutation offset has been determined.
p1990 = 0: De-activated
p1990 = 1: Activated with transfer
Dependency: Refer to: p0325, p0329, p0431, p1980, p1981, p1982, p1983, r1984, r1985, r1986, r1987
Refer to: A07971
Caution: In order to prevent an incorrect orientation of the electrical pole position (uncontrolled motor movement), the auto-
matically determined angular commutation offset (p0431) should, for reasons of safety, be checked using one of the
following recommendations:
Recommendation 1:
Set encoderless operation (p1300 = 20 or p1404 = 0), de-select pole position identification (p1982 = 0), operate
under no-load conditions with a speed > p1755, correct the actual value inversion (p0410.0) (e.g. r0061 = r0063),
read the angular error in r1778; the result in r1778 should be approximately 0, for |r1778| > 2 degrees, add the
value to p0431 - taking into account the sign - and enter in p0431.
Recommendation 2:
Set the current limit to 0 (p0640 = 0), activate travel to fixed stop (p1545 = 1), record r0089[0] (phase voltage) and
r0093 (electrically scaled pole position) (e.g. trace) while the motor is externally moved; in this case, the rising zero
crossover of the phase voltage must coincide with the 360 ° --> 0 ° step (jump) from r0093.
Recommendation 3:
Measure the phase voltage U (measure phase U with respect to the virtual star point using 3 resistors) and r0093
(electrically scaled pole position); the rising zero crossover of the phase voltage must coincide with the 360 ° --> 0 °
step (jump) of r0093.
Recommendation 4:
Determine the average value from several results of a pole position identification routine executed as test (p1983)
at various electrical angles and add the value to p0431 - taking into account the sign and enter into p0431.
Notice: For p1990 = 1 and with the pulses not enabled, the function is only executed the next time that the pulses are
enabled.
Note: If fault F07414 is present, the following applies:
First set p1990 to 1, then acknowledge the fault and then issue the enable signals.
p1991[0...n] Motor changeover, angular commutation correction / Ang_com corr
SERVO_S110-CAN, Can be changed: T
SERVO_S110-DP,
Data type: FloatingPoint32
SERVO_S110-PN
P-Group: -
Not for motor type: -
Min
-180 [°]
Description: Sets the angle that is added to the commutating angle.
Caution: If the angular correction is not correctly set, when changing over and with closed-loop torque control, the motor can
accelerate to high speeds in spite of the fact that a setpoint of zero has been entered.
© Siemens AG 2012 All Rights Reserved
SINAMICS S110 List Manual (LH7), 06/2012, 6SL3097-4AP10-0BP3
Calculated: -
Dynamic index: -
Units group: -
Scaling: -
Max
1
Calculated: -
Dynamic index: MDS, p0130
Units group: -
Scaling: -
Max
180 [°]
Parameter
List of parameters
Access level: 3
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
0
Access level: 3
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
0 [°]
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