Siemens 6RA70 specifications Execution of optimization runs

8Execution of optimization runs

8.1The unit must be in operating state o7.0 or o7.1 (enter SHUTDOWN!).

8.2Select one of the following optimization runs in key parameter P051:

P051 = 25 Optimization run for precontrol and current controller for armature and field P051 = 26 Speed controller optimization run

P051 = 27 Optimization run for field weakening

P051 = 28 Optimization run for compensation of friction moment and moment of inertia Note: The optimization runs should be performed in the above order.

8.3The SIMOREG converter switches to operating state o7.4 for several seconds and then to o7.0 or o7.1 and waits for the START command and ENABLE.

Enter the commands START and ENABLE.

The flashing of the decimal point in the operational status display on the PMU (simple operator control panel) indicates that an optimization run will be performed after the Start command.

If the start command is not given within 30 s, this waiting status is terminated and fault message F052 displayed.

8.4As soon as the converter reaches operating status <o1.0 (RUN), the optimization run is executed.

An activity display appears on the PMU, consisting of two 2-digit numbers, separated by a bar that moves up and down. These two numbers indicate (for SIEMENS personnel) the current status of the optimization run.

P051 = 25 Optimization run for precontrol and current controller for armature and field (process lasts approximately 40s).

The following parameters are set automatically: P110, P111, P112, P155, P156, P255, and P256.

NOTE

Permanent-field motors (and motors with an extremely high residual flux) must be mechanically locked during this optimization run.

WARNING

The set current limits are not effective during the current controller optimization run. 75% of the rated motor armature current flows for approximately 0.7s. Furthermore, individual current spikes of approximately 120% of the motor rated armature current are generated.

Siemens Energy & Automation	8-13
SIMOREG DC Master Base Drive Panel	Operating Instructions