Two-Way Operation Function - Mitsubishi Electric A800 Plus Series Function Manual

Two-way operation function

9.3
Two-way operation function
Description
• In order to switch the operation between winding and unwinding during dancer feedback speed control or tension sensor
feedback speed control, it is necessary to change the PID action (forward/reverse), winding/unwinding selection, and start
command (STF/STR). When the operation is switched between winding and unwinding and the dancer roll position /
tension during operation is held, the dancer roll position / tension fluctuates because the PID manipulated amount suddenly
changes along with the changes in the PID action and the start command. Therefore, switch the operation between winding
and unwinding while the line is stopped (line speed command: "0").
• By using the two-way operation function, the sudden change in the PID manipulated amount can be prevented, and the
operation can be switched between winding and unwinding while maintaining the dancer roll position / tension during
operation. Also, no change is required for parameter setting or signal input after switching the operation.
• The function is also enabled during tension sensorless torque control or tension sensor feedback torque control. Only the
winding and unwinding settings are changeable during tension sensorless torque control or tension sensor feedback torque
control.
Switching between winding and unwinding
• The action in winding/unwinding operation can be switched by turning the Two-way operation (X126) signal ON/OFF.
• To input the X126 signal, set "126" in any of Pr.178 to Pr.189 (input terminal function selection) to assign the function.
• By switching the operation between winding and unwinding, the following action is automatically changed accordingly.
Control
Dancer feedback speed control
Tension sensor feedback speed control
Tension sensorless torque control
Tension sensor feedback torque control
∗1 The STF/STR indication on the operation panel does not change.
NOTE
• During dancer feedback speed control or tension sensor feedback speed control, switching operation using the X126 signal is
available while the commanded line speed is 0 after line speed acceleration/deceleration. (If an analog or other input signal
cannot set the line speed to 0, use Pr.622 Line speed command for starting to set the line speed to 0. (Refer to
192
ROLL TO ROLL FUNCTION RELATED PARAMETERS
Function
PID action Pr.128
Winding/unwinding
Pr.1230
selection
Start signal (STF/STR signal)
Start command or operation panel key
∗1
operation
Winding/unwinding
Pr.1230
selection
Setting method
(X126-OFF)
Reverse action
Forward action
Winding
Unwinding
Forward rotation
Reverse
rotation
Winding
Unwinding
Operation status
Before After
switching switching
(X126-ON)
Forward action
Reverse action
Unwinding
Winding
Reverse
rotation
Forward rotation
Unwinding
Winding
page 66.))