Carotron Elite Pro EPN020-000, Instruction Manual

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Velocity Integral Time (202, 326)
The
Velocity Integral Time adjustment eliminates steady-state error. Decreasing the integral
time improves the response of the drive. However, setting it too low can cause oscillation.
The adjustment is in seconds and corresponds to the amount of time that the signal would
take to integrate from 0 to maximum with 100%
Velocity Error .
Velocity Overshoot Gain (204, 213)
The
Setpoint Weight parameter can be used to control the amount of overshoot. Adjustment
of the
Velocity Integral Gain
and
Velocity Integral Time
parameters should be done with
the Setpoint Weight set to 100%. This in effect gives standard PI loop operation. If needed,
the Setpoint Weight can then be reduced.
Integral Clamp (214)
When
Integral Clamp is True, the integral signal is clamped to zero in the PI loop, yielding
proportional control only.
Velocity Loop Output (205, Read-Only)
The output of the Velocity PI loop. This is the input to the Current PI loop when in velocity
mode.
Armature Voltage (417, Read-Only)
The AFB signal along with the
Nameplate Motor Voltage is used to calculate the actual
Armature Voltage .
100% RPM Level (199)
The
100% RPM Level is used to scale the Filtered Velocity Feedback , which is in
percentage, to RPM. Enter the corresponding RPM level that the drive runs when at 100%
speed.
Motor RPM (200, Read-Only)
This is the actual speed of the motor as calculated by the
100% RPM Level and the Filtered
Velocity Feedback measurement.
7.7 Current Loop Block
The Current Loop uses a closed loop Proportional-Integral (PI) loop to maintain desired armature
current or motor torque. The Loop Enable output from the Zero Speed Logic Block determines when
the PI loop is active.
Figure 14