Tension Feedback Malposition Detection - Mitsubishi Electric A800 Plus Series Function Manual

Tension sensor feedback torque control details
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.
Pr. Name
131
PID upper limit
A601
132
PID lower limit
A602
137 PID upper/lower limit
R163 hysteresis width
425
Break detection waiting time
R160
1103 Deceleration time at
F040 emergency stop
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.
150
TENSION SENSOR FEEDBACK TORQUE CONTROL
Tension feedback (N)
Pr.1139
Pr.1137
Pr.1136
Initial value
400 to 600%
9999
9999
400 to 600%
9999
9999
0 to 100%
9999
9999
0 to 100 s
9999
9999
5 s 0 to 3600 s
Analog input value (%)
Pr.1138
Setting
range
Set the value for outputting the PID upper limit (FUP)
signal .
No function
Set the value for outputting the PID lower limit (FDN)
signal .
No function
Prevent chattering of the FUP/FDN signals.
No function
Set the time until tension feedback malposition is
determined.
No break detection
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.
Description