5 Installation Procedure
22 YASKAWA ELECTRIC TOBP C730600 75B YASKAWA AC Drive Option PG-B3 Installation Manual
9.
Set drive parameters in Table 10 for proper motor rotation.
The leading pulse determines the motor rotation direction with a two-pulse or
three-pulse PG encoder.
PG encoder signals with leading pulse A are considered to be rotating forward
(counter-clockwise when viewing rotation from motor load side).
Figure 10
Figure 10 Displacement of A and B Pulses
10.
Energize the drive and manually rotate the motor to check the rotation direction
using monitor U1-05 on the keypad.
WARNING! Sudden Movement Hazard. Lock out the Run circuit to prevent issuing a Run command prior to
manually rotating the motor shaft with the drive energized. Failure to comply could cause death or serious
injury.
If necessary, either switch the two A channel wires with the two B channel wires on
option terminal TB1 as shown in Figure 11 or set F1-05/F1-32 to 1 to change the
forward direction.
Figure 11
Figure 11 Switch A Channel and B Channel Wires
Note: Setting A1-03 = 1110, 2220, or 3330 will reset F1-05/F1-32 to factory default. Re-set the
parameter to switch direction again.
U1-05 Value Motor Direction
Negative Reverse
Positive Forward
A pulse
B pulse
The A pulse leads, followed
by the B pulse displaced at 90 degrees
Time
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