Yaskawa 1000 Series Drive Option - Open Collector Type PG - Manual (Page 23)

5 Installation Procedure
YASKAWA ELECTRIC TOBP C730600 36C 1000-Series Option PG-B3 Installation Manual 23
8.
Set drive parameters in Table 7 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 12
Figure 12 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,
reverse the two A pulse wires with the two B pulse wires on option terminal TB1 as
shown in Figure 13 .
Figure 13
Figure 13 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.
A pulse
B pulse
The A pulse leads, followed
by the B pulse displaced at 90 degrees
Time →
B3
A+ A- B+ B- Z+ Z-
3 4 5 6
A+ A- B+ B- Z+ Z-
5 6 3 4
B3