YASKAWA U1000 Series - Page 448

8.4 Option Card Installation
448 YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
7. Replace and secure the front covers of the drive (D, F) and replace the digital operator (E).
Figure 8. 14
Figure 8.16 Replace the Front Covers and Digital Operator
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 followed by a B pulse displaced at 90 degrees is considered to be rotating
forward (counterclockwise when viewing rotation from motor load side).
Figure 8. 15
Figure 8.17 Displacement of A and B Pulses
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 8.18.
Figure 8. 16
Figure 8.18 A Channel and B Channel Wire Switching
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. However, when F1-05
and F1-32 are saved as User Parameters (o2-03 = 1) and the User Parameter settings are initialized using
A1-03 = 1110, the values for F1-05 and F1-32 are not reset.
D
E
F
A pulse
B pulse
The A pulse leads, followed
by the B pulse displaced at 90 degrees
Time
→
A+ A- B+ B- Z+ Z-
3456
A+ A- B+ B- Z+ Z-
5634
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