YASKAWA GA700 Technical Manual page 792

11.5 d: References
Run Command Direction
Forward run
Reverse run
Note:
For Yaskawa motors, the forward run direction is counterclockwise direction when seen from the load shaft.
When you use analog inputs, you can get negative input values with these methods:
• Apply negative voltage input signals.
• Use positive voltage input signals and set the analog input bias to negative values.
• Apply positive voltage input signals and use a digital input programmed for Analog TorqueRef Polarity Invert
[H1-xx = 78].
When you use MEMOBUS/Modbus communication or a communication option card, set the positive or negative
signed torque reference.
When the level of the analog signal input is 0 V to 10 V or 4 mA to 20 mA, the torque reference is the forward
direction. To reverse the polarity of the torque reference, use one of these two methods:
• Use a -10 V to +10 V voltage input
• Set H1-xx = 78 [MFDI Function Select = Analog TorqueRef Polarity Invert].
■
Speed Limit and Speed Limit Bias
The drive reads the speed limit setting from the input selected in d5-03 [Speed Limit Selection]. You can use d5-
05 [Speed Limit Bias] to add a bias to this speed. Parameter d5-08 [Uni-directional Speed Limit Bias] sets how
the drive applies bias to the speed limit.
Table 11.46 shows the relation between these settings:
Table 11.46 Speed Limit, Speed Bias and Speed Limit Priority Selection
Run Forward
command
Torque + (Positive)
reference
direction
Speed limit + (Positive)
direction
Direction of Forward
motor
rotation
Generated
torque
(d5-08 = 0
[Disabled])
*1
792
Table 11.45 Torque Control Signal Polarity
Torque Reference Signal
Polarity
+ (Positive)
- (Negative)
+ (Positive)
- (Negative)
Reverse Forward
+ (Positive) - (Negative)
- (Negative) - (Negative)
Reverse
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Direction of Motor Rotation
Forward direction
Reverse direction
Reverse direction
Forward direction
Operating Conditions
Reverse Forward
- (Negative) - (Negative)
+ (Positive) + (Positive)
Forward
Polarity of the Internal
Torque Reference [U1-09]
+ (Positive)
- (Negative)
- (Negative)
+ (Positive)
Reverse Forward
- (Negative) + (Positive)
- (Negative) - (Negative)
Reverse
Reverse
+ (Positive)
+ (Positive)