Mitsubishi Electric A800 Plus Series Function Manual page 83

Dancer feedback speed control details
Tension PI gain tuning status indicator
• The tension PI tuning status can be checked by reading the Pr.1219 setting. Alternatively, check the tension PI gain tuning
monitor, which is displayed instead of the output voltage monitor.
• The monitor is displayed on the operation panel as shown below.
Monitor readout of Pr.1219 Tension PI gain tuning status
Status
Tuning during stopping
Not performed 0
Tuning start 1
Tuning in progress 2
Tuning completed 3
Forced end 8
Tuning error 9, 90 to 96
NOTE
• When the tuning is forcibly terminated or a tuning error is displayed, tension PI gain tuning has not been properly completed.
Tuning error causes and corrective actions
• If a tuning error occurs, refer to the following for corrective actions.
Error
Name
indication
8 Forced end
Protective function
9
activation
Input upper limit
90
error
Input lower limit
91
error
92 Deviation limit error
93 Timeout error
94 Calculation error
95 Setting error
96 PID mode error
82
DANCER FEEDBACK SPEED CONTROL
Tuning during operation
—
—
12
13
Possible cause
The start signal has been turned OFF.
The PGT signal has been turned OFF.
The inverter has been reset.
An output shutoff has occurred.
An inverter protective function has been activated.
A value higher than the Pr.131 PID upper limit setting
is measured while Pr.554 PID signal operation
selection = "1 or 3".
A value lower than the Pr.132 PID lower limit setting
is measured while Pr.554 PID signal operation
selection = "1 or 3".
The deviation is higher than the Pr.553 PID deviation
limit setting while Pr.554 PID signal operation
selection = "2 or 3".
Tension PI gain tuning is not terminated within the time
set in Pr.1211 Tension PI gain tuning timeout time.
The tuning calculation is inconsistent.
Vibration amplitude Xc is equal to or lower than the
amount of hysteresis.
Pr.1222 Target amplitude is lower than the amount of
hysteresis.
PID control is disabled during tension PI gain tuning.
The PID control setting has been changed during
tension PI gain tuning.
The switchover frequency is not reached while Pr.127
PID control automatic switchover frequency is set.
The stall prevention or regeneration avoidance
function is activated.
Frequency fluctuation occurred because of the
frequency jump, maximum frequency, or minimum
frequency.
Corrective action
—
Refer to the FR-A800 Instruction Manual
(Detailed) to identify the cause and take
corrective actions.
Check the Pr.131 and Pr.554 settings.
Check the Pr.132 and Pr.554 settings.
Check the Pr.553 and Pr.554 settings.
Set a larger value in Pr.1211.
• Tuning during stopping
The dancer signal may include noise. Set
a larger value in Pr.1222 or take
countermeasures against noise to reduce
the dancer signal noise.
• Tuning during operation
Check the settings of Pr.1222 and Pr.1217
Limit cycle hysteresis. The Pr.1222
setting must be higher than the Pr.1217
setting.
Check that PID control can be performed
normally.
Set "9999" in Pr.127.
Refer to the FR-A800 Instruction Manual
(Detailed) to check the setting.