Tension sensor feedback torque control details
150
TENSION SENSOR FEEDBACK TORQUE CONTROL
Tension feedback calibration (Pr.1136 to Pr.1139)
• Set
Pr.1136 to Pr.1139
to calibrate the tension feedback input value.
Tension feedback input filter (Pr.1227)
• Use
Pr.1227 Dancer / tension sensor feedback input filter time constant
to set the primary filter for the tension
feedback input value. When
Pr.1227
= "0", the filter setting is disabled.
6.5.4
Tension feedback malposition detection
Set the following parameters to prevent the motor speed from increasing at zero (0 N) tension feedback caused by a break.
Tension feedback malposition detection (break detection) (Pr.131,
Pr.132, Pr.425)
• Set the upper limit of tension feedback in
Pr.131 PID upper limit
. Set the lower limit of tension feedback in
Pr.132 PID
lower limit
.
• The FUP signal is output when a tension feedback value exceeds the
Pr.131
setting. When a value falls below the
Pr.132
setting, the FDN signal is output.
• When tension feedback remains higher than the
Pr.131
setting or lower than the
Pr.132
setting for the time set in
Pr.425
Break detection waiting time
or longer, the condition is determined as tension feedback malposition (break), and
compensation by PID control becomes 0. The winding diameter at the time of malposition detection is retained.
• When a tension feedback malposition occurs, the torque command value becomes 0. To decelerate the motor to a stop,
turn OFF the start signal. The deceleration stop is performed according to the setting in
Pr.1103 Deceleration time at
emergency stop
.
• When tension feedback malposition (break) is detected, the Break detection (Y231) signal can be output.
• When the following two conditions are both met, PID calculation is resumed.
- The motor is stopped or output is shutoff.
- The start signal is OFF.
Pr.
Name
Initial value
Setting
range
Description
131
A601
PID upper limit
9999
400 to 600%
Set the value for outputting the PID upper limit (FUP)
signal .
9999
No function
132
A602
PID lower limit
9999
400 to 600%
Set the value for outputting the PID lower limit (FDN)
signal .
9999
No function
137
R163
PID upper/lower limit
hysteresis width
9999
0 to 100%
Prevent chattering of the FUP/FDN signals.
9999
No function
425
R160
Break detection waiting time
9999
0 to 100 s
Set the time until tension feedback malposition is
determined.
9999
No break detection
1103
F040
Deceleration time at
emergency stop
5 s
0 to 3600 s
Set the motor deceleration time at a deceleration by
turning ON the X92 signal.
Set a deceleration time for the deceleration stop at the
occurrence of tension feedback malposition.
Pr.1136
Pr.1138
Pr.1137
Pr.1139
Analog input value (%)
Tension feedback (N)
Содержание A800 Plus Series
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