Siemens SINAMICS S120 Function Manual page 94

Operating Modes
Servo control
Commissioning / optimization
1. Estimate the motor current p1612 on the basis of the mechanical conditions
(I = M/kt).
2. Set Kn (p1470) and Tn (p1472) above I/f operation (> p1755). The load
moment of inertia should be set to zero here (p1498 = 0), since this
deactivates part of the torque pre-control.
3. Determine the load moment of inertia in the speed range above I/f operation
(> p1755) by setting p1498 via a ramp response (e.g. ramp time 100 ms) and
assessing the current (r0077) and model speed (r0063).
Parameter overview (see List Manual)
S p0341
S p0342
S p0353
S p0600
S p1300
S p1400.11
S p1404
S r1407.1
S p1470
S p1472
S p1498
S p1517
S p1612
S p1755
S p1756
Function diagram overview (see List Manual)
S 5050
S 5060
S 5210
3-94
Motor moment of inertia
Ratio between the total moment of inertia and that of the motor
Motor series inductance
Motor temperature sensor for monitoring
Open-loop/closed-loop control operating mode
Speed control configuration; sensorless operation actual speed
value start value
Sensorless operation changeover speed
CO/BO: Status word speed controller; sensorless operation
active
Speed controller sensorless operation P-gain
Speed controller sensorless operation integral-action time
Load moment of inertia
Accelerating torque smoothing time constant
Current setpoint, open-loop control, sensorless
Motor model without encoder, changeover speed
Motor model changeover speed hysteresis
Kp_n/Tn_n adaptation
Torque setpoint, control mode switchover
Speed controller
© Siemens AG, 2005. All rights reserved
SINAMICS S120 Function Manual, 06/05 Edition