Omron VARISPEED F7 User Manual page 309

put by the speed limiter is the same as the actual load, the motor will stop accelerating and run at a constant
speed.
Configuration
Normal Rotation Direc-
tion
Torque Reference Polar-
ity (TREF)
Speed Limit Polarity
(SLIM)
Generated Torque
6
Torque Reference Signal Adjustments
Torque Reference Delay Time (d5-02)
The filter time constant in the torque reference section can be adjusted using parameter d5-02. This parameter
is used to eliminate noise in the torque reference signal and adjust the responsiveness to the host controller.
Increase the setting if oscillations occur during torque control.
Setting the Torque Compensation
An analog input can be used to apply a torque compensation (H3-09 = 14). When the amount of torque loss for
mechanical loss or other influences at the load is input to one of this terminal, it is added to the torque refer-
ence to compensate the loss. The direction of torque will be as follows:
Positive voltage (current): Torque compensation reference for forward motor rotation (counterclockwise as
•
viewed from the motor output axis).
Negative voltage: Torque compensation reference for reverse motor rotation (clockwise as viewed from
•
the motor output axis).
Since the polarity of the voltage input determines the direction, only forward torque compensation can be
input when the 0 to 10 V or 4 to 20 mA signal level has been selected. If a reverse torque compensation shall
be input, be sure to select the 0 to ±10 V signal level.
Speed/Torque Control Switching Function
It is possible to switch between speed control and torque control using one of the digital inputs (H1-
Speed/Torque Control Change). Speed control is performed when the input is OFF and torque control is per-
formed when the input is ON. The parameter d5-01 has to be set to 0.
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6-
Winding Operation
Line Direction
Forward
Torque
n
Torque
Torque
limit
limit
TREF
Speed
0
nLIM
nLIM
-(d5-05)
Torque
limit
n T
T
n
M
Reverse Forward
Torque
Torque
Torque
limit
(d5-05)
-(d5-05)
nLIM
Speed
0
0
TREF
Torque
n limit
Rewinding Operation
Line Direction
M
Reverse
Torque
Torque
limit
TREF
n
Speed
0
nLIM
TREF (d5-05)
Torque Torque
limit
n
= 71,
Speed
limit