Parameter setting procedure for tension sensor feedback speed control
TENSION SENSOR FEEDBACK SPEED CONTROL
103
4
9
PID control action setting
Set the following parameters for PID control.
∗1
Set the parameter according to the specification of the machine used.
The following table shows a setting example.
10
PID control action check (example)
Apply tension force corresponding to the tension command to the tension sensor.
Input a line speed command of 0 m/min.
Input the X114 signal and start command.
Start the motor without feeding the workpiece.
Change the tension during motor operation, and check that the following motor speed conditions.
If any inconsistency is found, check the
Pr.128
setting.
11
PID control gain adjustment
Feed the workpiece through the system and adjust the tension PI gain. Refer to
for the tension PI gain
adjustment.
12
Test run
Operate the system starting from the maximum-diameter roll to the minimum-diameter roll and vice versa and
check that no fault is found in the system behavior.
Pr.
Name
Setting
Remarks
128
PID action selection
40 or 41
40: Tension sensor feedback speed control (reverse action)
41: Tension sensor feedback speed control (forward action)
131
PID upper limit
Set the value (0.1% increment) for outputting the PID upper limit
(FUP) signal.
132
PID lower limit
Set the value (0.1% increment) for outputting the PID lower limit
(FDN) signal.
133
PID action set point
Set the tension command value (0.01% increment).
Item
Setting example
Tension command setting method
Setting the tension command directly
Parameter setting
Perform calculation to convert the output voltage sent from the tension sensor when an
intended tension command is applied.
Convert the output voltage of the tension sensor to a percentage. Here 5 V corresponds
to 100%.
Set the output voltage value (in %) plus 500% in
Pr.133
.
Winding/unwinding
Tension feedback
Motor speed
Winding
Tension feedback
≥
Tension command
Deceleration
Tension feedback < Tension command
Acceleration
Unwinding
Tension feedback
≥
Tension command
Acceleration
Tension feedback < Tension command
Deceleration
Summary of Contents for A800 Plus Series
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