Mitsubishi Electric A800 Plus Series Function Manual page 79

Dancer feedback speed control details
4
Finishing tuning
Stop the start command to finish tuning.
When the polarity reversible operation is not required, set Pr.73 back to the previous value.
NOTE
• To finish tuning forcibly, perform any of the following:
Set "8" in Pr.1219.
Turn OFF the start signal.
Inverter reset
Turn ON the MRS signal.
CAUTION
 When tension PI gain tuning is started, the motor is automatically started and the dancer roll starts
moving. If a too large value is set in Pr.1222 under dancer feedback speed control, the dancer roll
may hit against the system and result in damage.
Procedure of tension PI gain tuning (during operation)
POINT POINT
• Perform tension PI gain tuning during stopping first, and then perform tension PI gain tuning during operation as required.
1
Parameter setting
Set the following parameter.
Pr.
646 Stored winding diameter
2
Starting operation
Start the inverter operation.
3
Starting tuning
Set "1" in Pr.1219 Tension PI gain tuning start/status or turn ON the Tension PI gain tuning start / forced end
(PGT) signal during operation to start tuning. To input the PGT signal, set "81" in any of Pr.178 to Pr.189 (input
terminal function selection) to assign the function.
The inverter returns to the normal operation after the tuning is completed. As a proof of normal completion, the
Pr.1219 setting changes to "13".
NOTE
• To finish tuning forcibly, perform any of the following:
Set "8" in Pr.1219.
Turn OFF the Tension PI gain tuning start / forced end (PGT) signal.
Turn OFF the start signal.
Inverter reset
Turn ON the MRS signal.
• If "1" is already set in Pr.1219 or the PGT signal is ON when the power is supplied to the inverter, tuning does not start by
starting the start command.
CAUTION
 If a too large value is set in Pr.1222 under dancer feedback speed control, the dancer roll may hit
against the system and result in damage.
78
DANCER FEEDBACK SPEED CONTROL
Name
When the initial winding diameter calculation is invalid, set the winding
diameter value.
Setting