YASKAWA 1000 Series Installation Manual page 24

5 Installation Procedure
9.
Set drive parameters in
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 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.
WARNING! Ensure the drive RUN circuit is locked out and a RUN command is not possible before
attempting to manually rotate the motor shaft with the drive powered on. Failure to comply may cause injury
to personnel due to inadvertent equipment movement.
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,
reverse the two A channel wires with the two B channel wires on option terminal
TB1 as shown in
Figure 11
A+ A−
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.
Note: If the drive is initialized using A1-03 =1110, 2220, or 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.
24
Table 6
X3
A pulse
B pulse
Figure 11 Displacement of A and B Pulses
Figure 12.
B+ B− Z+ Z− SD FE
Figure 12 A Channel and B Channel Wire Switching
YASKAWA ELECTRIC TOBP C730600 37C 1000-Series Option PG-X3 Installation Manual
for proper motor rotation.
The A pulse leads, followed
by the B pulse displaced at 90 degrees
A+ A− B+
X3
Time →
B− Z+ Z− SD FE