Simulation Operation - Siemens SINAMICS G150 Operating Instructions Manual

9.2.14

Simulation operation

Description
The simulation function is predominantly used to simulate the drive without a motor being
connected and without a DC link voltage. In this case, it should be noted that the simulation
mode can only be activated under an actual DC link voltage of 40 V. If the voltage lies above
this threshold, the simulation mode is reset, and a fault message F07826 is issued.
Communications with a higher-level automation system can be tested using the simulation
mode. If the drive is also to return actual values, note that it must be switched over to
encoderless operation during simulation mode. This means that large parts of the SINAMICS
software (e.g., software channel, sequence control, communications, technology function,
etc.) can be tested in advance without requiring a motor.
Another application is to test the correct functioning of the Power Module. Especially for drive
units with higher power ratings 75 kW (690 V) and 110 kW (400 V), after repairs, it is
necessary to test the gating of the power semiconductors. This is done by injecting a low DC
voltage as DC link voltage (e.g. 12 V). The drive unit is then powered-up and the pulses
enabled. It must be possible to run through all of the pulse patterns of the gating unit
software.
This means that the software must allow the pulses to be switched-in and various
frequencies approached. If a speed encoder is not being used, then this is generally
implemented using V/f control or sensorless closed-loop speed control.
Note
The following functions are de-activated in the simulation mode:
• Motor data identification
• Motor data identification, rotating without encoder
• Pole position identification
No flying restart is carried-out for V/f control and sensorless closed-loop vector control.
Commissioning
Simulation is activated using p1272 = 1; the following pre-requisites must be fulfilled:
● The drive unit must have been commissioned for the first time (default: Standard
● The DC link voltage must lie below 40 V (observe the tolerance of the DC link voltage
Alarm A07825 (simulation mode activated) must be output during simulation operation.
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
induction motors).
sensing).
Functions, Monitoring, and Protective Functions
9.2 Drive Functions
459