Dancer Control - Mitsubishi Electric 800 Series Instruction Manual

14.6

Dancer control

PID control is performed using detected dancer roll position as feedback data. The dancer roll is controlled to be at a designated
position.
Pr. Name
44 Second acceleration/
F020 deceleration time
45 Second deceleration
F021 time
128
PID action selection
A610
129
PID proportional band
A613
130
PID integral time
A614
131
PID upper limit
A601
132
PID lower limit
A602
133
PID action set point
A611
134
PID differential time
A615
609 PID set point/deviation
A624 input selection
610 PID measured value
A625 input selection
*1 Initial value for the FR-E820-0175(3.7K) or lower, FR-E840-0095(3.7K) or lower, FR-E860-0061(3.7K) or lower, and FR-E820S-0110(2.2K) or
lower.
*2 Initial value for the FR-E820-0240(5.5K) or higher, FR-E840-0120(5.5K) or higher, and FR-E860-0090(5.5K) or higher.
Initial value Setting range
Set the acceleration/deceleration time during dancer control.
*1
5 s
In dancer control, this parameter becomes the acceleration/deceleration
0 to 3600 s
time of the main speed.
*2
10 s
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 deceleration time of the
0 to 3600 s
main speed.
9999
This setting does not operate as the second deceleration time.
9999 Pr.44 is the deceleration time.
0 No PID action
40 PID reverse action
41 PID forward action
0
42 PID reverse action
43 PID forward action
Others Refer to
If a narrow proportional band is set (small parameter setting value), the
manipulated amount changes considerably by slight changes in the
0.1% to measured value.
1000% As a result, response improves as the proportional band becomes
100%
narrower, though stability worsens as shown by the occurrence of hunting.
Gain Kp=1/proportional band
9999 No proportional control
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 integral time is set,
1 s
though hunting is more likely to occur.
9999 No integral control
Set the upper limit.
The FUP signal is output when the feedback value exceeds this setting.
0% to 100%
The maximum input (20 mA/5 V/10 V) of the measured value (terminal 4)
9999
is equivalent to 100%.
9999 No function
Set the lower limit.
The FDN signal is output when the measured value (terminal 4) falls below
0% to 100% 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
Response to changes in deviation increase greatly as the differential time
9999
increases.
9999 No differential control
2 The set point is input through terminal 2.
3 The set point is input through terminal 4.
2
4 The set point is input via communication
5 The set point is input by the PLC function.
2 The measured value is input through terminal 2.
3 The measured value is input through terminal 4.
3
4 The measured value is input via communication.
5 The measured value is input by the PLC function.
Description
Additive method: Fixed
Additive method: Fixed
Additive method: Ratio
Additive method: Ratio
page 339.
For dancer control
14.(A) Application Parameters
14.6 Dancer control
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