Siemens 6RA7086-6KS22 Operating Instructions Manual page 174

Start-Up
At the end of the optimization run, P051 is displayed on the operator panel and the drive
8.5
switches to operating state o7.2.
NOTICE
In the case of drives with a limited travel path, the optimization run for field weakening (P051=27)
may not be interrupted by the SHUTDOWN command until the 1st field weakening measuring
point has been plotted. Likewise, the optimization run for the friction moment and moment of
inertia compensation function (P051=28) may not be interrupted by SHUTDOWN until the
measuring point at 10% of maximum speed has been determined. Premature interruption in both
cases will lead to activation of fault message F052. When either of these optimization runs is
restarted (P051=27 or P051=28), it will be continued at a more advanced position. In this way,
the respective run can be completed in several stages, even if the travel path is limited.
Note:
The respective optimization run is executed completely after a restart if a) a fault message is
activated during the optimization run, b) if the electronics supply is disconnected before the
relevant optimization run is restarted, c) if another function dataset than the one before is
selected or d) if another optimization run is started in-between.
The parameters of the function data set selected in each case are optimized.
While optimization runs are being executed, the function data set selection must not be changed
or else a fault message will be activated.
NOTE
Optimization runs should be executed in the order listed above (precontrol and current controller,
speed controller, field weakening control, friction moment and moment of inertial compensation).
The determined parameters are dependent on the motor temperature. Values set automatically
when the motor is cold can be used as effective defaults.
For highly dynamic drives, the optimization run P051=25 should be repeated after the drive has
been operated under load (i.e. when motor is warm).
Checking and possible fine adjustment of maximum speed
9
After the optimization runs have been executed, the maximum speed must be checked and it's setting
corrected if necessary.
If it is necessary to change the maximum speed setting by more than about 10%, the control response
of the speed control loop must be checked. It may be necessary to repeat the speed controller
optimization run or re-optimize the controller manually.
The optimization runs for field weakening and friction motor and moment of inertial compensation
must be repeated every time the maximum speed setting is altered.
Checking the drive settings
10
The optimization runs do not provide optimum results for every application. The controller settings
must therefore be checked by suitable means (oscilloscope, DriveMonitor, Trace etc.). In some cases,
manual re-optimization will be necessary.
7-16
SIEMENS AG
SIMOREG DC Master Operating Instructions
05.05
6RX1700-0AD76