Operating instructions

Product Information - Function Manual

SINAMICS G120, SINAMICS G120D, SIMATIC ET 200S FC, SIMATIC ET 200pro FC

Product Information

Edition 06/2007

This product information sheet describes the behavior of the above mentioned inverters

(Firmware version V3.0), that is not described in the associated documentation, edition

06/2007, Firmware version 3.0.

All inverters

If in sensorless vector control (SLVC) one of the following problems appears

• motor does not ramp up

• setpoint jumps at low frequencies at ramp down

• motor does not ramp down to 0 Hz even if torque limit is set to 0

• the calculated motor temperature (P0621 > 0) shown in r0035 is implausible

this can be caused by faulty values for both, stator and motor cable resistance.

Try the following to solve the problem:

• disconnect the motor from the feeder cable,

• measure the stator resistance and the motor cable resistance with an ohmmeter or

better with a wheatstone bridge

• put the values in P0350 (stator resistance) and P0352 (cable resistance),

• then perform "calculation of motor parameters" again with P0340 = 3.

If you don' not get feasible values measuring the stator resistance, use the equivalent

circuit data of the motor (this can be can be provided by the motor manufacturer) and

write it into the respective parameters (fig 6.1 in Function Manual) or reduce the stator

resistance in 5 % steps and perform "calculation of motor parameters" again with

P0340 = 3.

Fail-safe inverters

If activating SS1 or SLS, this triggers the STO signal as a pulse. This STO pulse has no

influence on the SS1 or SLS function and can be ignored.

CU240S PN

If in HW config of STEP 7 a different telegram type is selected from the telegram type

selected in P0922 in the inverter, the inverter trips - by fault - with F00452 (belt failure). If

this fault occurs then check the telegram set in HW config and P0922.

Power Modules PM260

With Power Modules PM260 "motor temperature identification" (P0621) only works with a

KTY sensor.

SINAMICS G120

SINAMICS G120D

SIMATIC ET 200S FC

SIMATIC ET 200pro FC