Chapter 4: AC Drive Parameters
4–78
Encoder Feedback Parameters
Encoder Pulses Per Revolution Default 1024
Range: 01 to 20000
An encoder is used as a transducer to feed back the motor speed, and this
parameter defines the number of pulses for each cycle of the PI control.
Encoder Type Input Default: 00
Range:
00 Disable
01 Single Phase
02 Quadrature, FWD - CCW
03 Quadrature, FWD - CW
This parameter is used to specify encoder signal type. Settings 02 and 03 are used
to distinguish motor rotation in relation to the quadrature type encoder signal.
Error message “ENC SIGNAL ERROR” will come up if motor rotation does not
match quadrature settings.
Proportional Control
Default: 1.0
Range: 0.0 to 10.0
This parameter specifies proportional control and associated gain (I) used for
vector control with encoder feedback (P2.10 = 03). As part of the drive’s control
algorithm, the most recent feedback signal is multiplied on each scan by the
scaling factor set by this parameter.
Integral Control
Default: 1.00
Range: 0.00 to 100.00 sec
This parameter specifies integral control and associated gain (I) used for vector
control with encoder feedback (P2.10 = 03). The drive calculates a running
integral, or summation, of the feedback signal over the time period set by this
parameter. This summation, rather than the most recent feedback signal, is used
in the control algorithm. Integral control “smoothes” the effect of radical changes
in the feedback signal.
P10.03
P10.02
The diagram on the following page shows the output control relationship of P10.02,
P10.03 and P10.04.
P10.01
P10.00
DURAPULSE AC Drive User Manual
1st Ed. Rev. D 05/2013
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