8.4 Option Card Installation
9.
For the PG-B3 and PG-X3 Option, set drive parameters
A1-02: Control Method Selection on page 134
and
F1: PG Speed Control Card on page 333
for proper motor rotation.
With a two-pulse or three-pulse PG encoder, the leading pulse determines the motor rotation direction. A PG
encoder signal with leading A pulse is considered to be rotating forward (counter-clockwise when viewing
rotation from motor load side).
The A pulse leads, followed
by the B pulse displaced at 90 degrees
B pulse
L
Time ^
F ig u r e 8 .1 3 D is p l a c e m e n t o f A a n d B P u l s e s
10. After connecting the PG encoder outputs to the option, apply power to the drive and manually rotate the motor
and check the rotation direction by viewing monitor U1-05 on the digital operator.
Reverse motor rotation is indicated by a negative value for U1-05; forward motor rotation is indicated by a
positive value.
If monitor U1-05 indicates that the forward direction is opposite of what is intended, set F1-05 to 1, or reverse the
two A pulse wires with the two B pulse wires on option terminal TB1 as shown in
Figure 8.14.
A+ A- B+ B- Z+
3 4
5
6
B i l i
F ig u r e 8 .1 4 A C h a n n e l a n d B C h a n n e l W ire S w itc h in g
11. If switching the wires is inconvenient, set drive parameter F1-05 to 1 to switch the direction of how the option
reads pulses from the PG encoder output.
Please note that when the drive is initialized using A1-03 =1110, 2220, 3330, the value for F1-05 will reset to
factory default and the parameter will need to be adjusted again to switch the direction.
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YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual