SINAMICS S120 Functi.. - Gregbotos.com

Operating ModesServo controlCommissioning/optimization1. 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 loadmoment of inertia should be set to zero here (p1498 = 0), since thisdeactivates 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) andassessing the current (r0077) and model speed (r0063).Parameter overview (see List Manual) p0341 Motor moment of inertia p0342 Ratio between the total moment of inertia and that of the motor p0353 Motor series inductance p0600 Motor temperature sensor for monitoring p1300 Open-loop/closed-loop control operating mode p1400.11 Speed control configuration; sensorless operation actual speedvalue start value p1404 Sensorless operation changeover speed r1407.1 CO/BO: Status word speed controller; sensorless operationactive p1470 Speed controller sensorless operation P-gain p1472 Speed controller sensorless operation integral-action time p1498 Load moment of inertia p1517 Accelerating torque smoothing time constant p1612 Current setpoint, open-loop control, sensorless p1755 Motor model without encoder, changeover speed p1756 Motor model changeover speed hysteresisFunction diagram overview (refer to the List Manual) 5050 Kp_n/Tn_n adaptation 5060 Torque setpoint, control mode switchover 5210 Speed controller© Siemens AG 2006 All Rights ReservedSINAMICS S120 Function Manual, 03/2006 Edition3-97