# Dancer Control - Mitsubishi Electric FR-A820-00046 Instruction Manual

(A) Application parameters
5.14.12

## Dancer control

PID control is performed using the detected dancer roll positions as feedback data. The dancer roll is
controlled to be at a designated position.
Pr.
44
F020
45
F021
128
A610
129
A613
130
A614
131
A601
132
A602
133
A611
134
A615
5 - 552
Name
Second acceleration/
deceleration time
Second deceleration time
PID action selection
PID proportional band
PID integral time
PID upper limit
PID lower limit
PID action set point
PID differential time
Initial
Setting
Description
value
range
Set the acceleration/deceleration time during dancer
control.
In dancer control, this parameter becomes the
5 s
0 to 3600 s
acceleration/deceleration time of the main speed.
This setting does not operate as the second
acceleration/deceleration time.
Set the deceleration time during dancer control.
In dancer control, this parameter becomes the
0 to 3600 s
deceleration time of the main speed.
9999
This setting does not operate as the second deceleration
time.
9999
Pr. 44 is the deceleration time.
0
No PID action
PID reverse
40
action
PID forward
41
action
0
PID reverse
42
action
PID forward
43
action
Others
Refer to page 5-524.
If a narrow proportional band is set (small parameter
setting value), the manipulated amount changes
considerably by slight changes in the measured value.
0.1 to
As a result, response improves as the proportional band
1000%
100%
becomes narrower, though stability worsens as shown
by the occurrence of hunting.
Gain Kp=1/proportional band
9999
Without proportional band
With deviation step input, this is the time (Ti) used for
obtaining the same manipulated amount as
proportional band (P) by only integral (I) action.
0.1 to
3600 s
Arrival to the set point becomes quicker the shorter an
1s
integral time is set, though hunting is more likely to
occur.
9999
Without integral control
Sets the upper limit.
The FUP signal is output when the feedback value
0 to 100%
exceeds this setting.
9999
The maximum input (20 mA/5 V/10 V) of the measured
value (terminal 4) is equivalent to 100%.
9999
No function
Set the lower limit.
The FDN signal is output when the measured value
0 to 100%
(terminal 4) falls below the setting range.
9999
The maximum input (20 mA/5 V/10 V) of the measured
value is equivalent to 100%.
9999
No function
0 to 100%
Set the set point during PID control.
9999
9999
Input of set point by terminal selected by Pr. 609
With deviation ramp input, this is the time (Td) used for
obtaining the manipulated amount only by
proportional action (P).
0.01 to 10 s
9999
Response to changes in deviation increase greatly as the
differential time increases.
9999
Without differential control
Parameters
method: Fixed
method: Fixed
For dancer control
method: Ratio
method: Ratio