Chapter 4 Parameters
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Group 13: PG function Parameters for Extension Card
Pulse generator card (PG card) is mainly applied in the detection components of speed control or
position control. It usually makes a closed-loop speed control system with encoder. The AC motor
drive is used with encoder and PG card to have a complete speed control and position detection
system.
Please make sure that the extension card is installed on the AC motor drive correctly before using
group 13 parameters. See Appendix B for details.
13.00 PG Input
Factory Setting: 0
Settings 0 Disable PG
1 Single phase
2 Forward/Counterclockwise rotation
3 Reverse/Clockwise rotation
There are two outputs, 1-phase and 2-phase output, for the encoder output. For the 1-phase
output, the encoder output is a group of pulse signal. For the 2-phase output, the encoder can
output A and B pulse signals with 90
o
phase difference. The encoder is defined by the timing
of A and B pulses as the following figure. It can not only measure the speed but distinguish
motor rotation direction by A and B pulse signals.
PG card receives A and B pulses from encoder output and sends this feedback signal to the
AC motor drive for speed or position control.
Setting 0: disable PG function.
Setting 1: for speed/position control but can’t distinguish motor rotation direction.
Setting 2: both for speed control and distinguish motor rotation direction. A phase leads B
phase as shown in the following diagram and motor is forward running.
Setting 3: both for speed control and distinguish motor rotation direction. B phase leads A
phase as shown in the following diagram and motor is reverse running.
Related parameter: Pr.13.01(PG Pulse Range)
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