YASKAWA CR700, Technical Manual, Page: 182 / 886

3.5 Items to Check before Starting Up the Drive
182 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
• If the phase order is U, V, and W when operating the motor to lower the load, then check if b1-14 = 1 [Switch
Phase Order]
.
Note:
First set the direction of motor rotation before setting the direction of rotation for the encoder.
◆
Setting the Encoder (Pulse Generator)
■
Setting the Number of Pulses
Set the number of pulses for the encoder (pulse generator) in F1-01 [Encoder 1 Pulse Count (PPR)] .
■
Setting the Direction of Motor Rotation
Use the drive to confirm that the rotation direction of the PG or encoder is correctly set by the following steps.
When Encoder Signal is Available
1.
Check if the output signal from the PG and encoder leads with the A phase or the B phase when the
Forward run command is input.
2.
If the output signal leads with the A phase (the A pulse leads at 90
°
from the B phase when the motor
rotates forward), then set F1-05 = 0 [Encoder 1 Rotation Selection = Pulse A leads in FWD Direction] .
3.
If the output signal leads with the B phase (the B pulse leads at 90 ° from the A phase when the motor
rotates forward), then set F1-05 = 1 [Pulse B leads in FWD Direction] .
When Encoder Signal is Not Available
1.
Manually rotate the motor in the forward direction for the crane (hoisting) and verify the changes in U1-05
[Motor Speed] .
2.
If the value display in U1-05 is positive, then the PG and encoder are rotating in the correct direction.
3.
If the value display in U1-05 is negative, change the setting to F1-05 = 1 if it is set to 0, and change the
setting to F1-05 = 0 if it is set to 1.
Note:
First set the direction of motor rotation before setting the direction of rotation for the encoder.