YASKAWA A1000 Technical Manual page 426

8.4 Option Card Installation
7.
Replace and secure the front covers of the drive (D, F) and replace the digital operator (E).
Figure 8.13
Note: Take proper precautions when wiring the option so that the front covers will easily fit back onto the drive. Make sure cables are
not pinched between the front covers and the drive when replacing the covers.
8.
For the PG-B3 and PG-X3 Option, set drive parameters 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).
Figure 8.14
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 or F1-32 to 1, or
reverse the two A pulse wires with the two B pulse wires on option terminal TB1 as shown in
Figure 8.15
If switching the wires is inconvenient, set drive parameter F1-05/F1-32 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/F1-32 will reset
to factory default and the parameter will need to be adjusted again to switch the direction.
426
Figure 8.15 Replace the Front Covers and Digital Operator
The A pulse leads, followed
by the B pulse displaced at 90 degrees
A pulse
B pulse
Figure 8.16 Displacement of A and B Pulses
A+ A- B+ B- Z+ Z-
3 4 5 6
Figure 8.17 A Channel and B Channel Wire Switching
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
D
E
F
Time →
A+ A- B+ B- Z+ Z-
5 6 3 4
Figure 8.17.