Omron VARISPEED F7 User Manual page 310

Setting the Speed/Torque Control Switching Timer (d5-06)
The delay between a change in the speed/torque control switching function input (ON to OFF or OFF to ON)
and the corresponding change in the control mode can be set in parameter d5-06. During the timer delay, the
value of the 2 analog inputs will retain the values they had when the ON/OFF status of speed/torque control
switching signal was changed. Use this delay to complete any changes required in external signals.
Fig 6.88 shows an example of speed/torque control switching.
Speed/torque change
signal
Run command Stop
Control mode
Terminal A1 input
Terminal A2 input
Fig 6.88 Speed/Torque Control Switching Time Chart
Application Precautions
The function of the torque reference input (A1 or A2) changes when the control mode is switched between
•
torque control and speed control.
During speed control: The analog input terminal is used as the torque limit input.
During torque control: The analog input terminal is used as the torque reference input.
When the run command is turned OFF, the control method will be speed control. Even from the torque
•
control mode, the system will automatically change to speed control and decelerate to a stop when the run
command turns OFF.
CLOSED
OPEN
Run
Speed Torque
Speed limit
Speed
reference
Torque limit Torque limit
Torque
reference
1 2
CLOSED
OPEN
Speed Torque Speed (decel to stop)
Speed limit
Speed
reference
Torque
reference
3 4
Stop
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