Setting up Compax3
C3I12T11
192-120113 N08 C3I12T11 - December 2010
Position demand value step: For analysis of the demand value behavior of
the position control
Step value < (admissible motion range / 2)
=> even a 100% overshoot does not incite an error message
Speed demand value step: For analysis of the demand value behavior of the
speed control
The position control is switched off during the measurement, this might lead in
exceptional cases to a slow drift of the position.
Furthermore you should make sure that the selected speed step value corresponds
to the parameterized admissible motion range.
Step value < (admissible motion range / time of measurement)
with time of measurement > 2s
Current demand value step: For analysis of the demand value behavior of the
current control
The current setpoint jerk is set at the end of the oscilloscope recording time, but is
reset to 0 after max. 50mS.
Caution!
Many systems are not stable without control!
Position as well as speed control are switched off during measurement =>
no measurement on z-axes!
Disturbance torque / force step response: For analysis of the disturbance
value behavior of the control
The step of an external disturbance force is simulated and the reaction of the
controller is registered.
Shaker function
For this, a sine signal is injected to the current which is used to excite the mechanic
system. This allows to analyze the oscillation behavior - what oscillates at which
frequency.
Basic settings of the analysis functions:
Maximum torque / maximum current / maximum speed (display):
This is used as a lead for the selection of a suitable step value and indicates which
maximum step value is possible.
Step value:
Gives the value of a step.
Permissible motion range (+/-):
Indication, in which position window the axis may move during the analysis.
This range is not left even in the event of an error.
If the drive approaches the limits of the motion range, the controller will
decelerate so that the drive will come to a standstill within the permitted motion
range. The maximum permitted velocity is used to calculate the deceleration
ramp, therefore the drive stops even before reaching the range limits and reports
an error.
Please make sure that a sufficiently large movement is set for the measurement
and that it will be reduced by a high maximum permitted velocity.
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