Mitsubishi Electric FR-A700 Series, Техническое руководство

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411
PARAMETER
2
P
ARAM
ETE
R
2.20.5 Dancer control [Pr.44, 45, 128 to 134]
Performs PID control by feedback of the position detection of the dancer roller, controlling the dancer roller is in the specified
position.
[Pr.] Name
Initial
Value Setting
Range
Description
Available
Inverters
44
Second
acceleration/
deceleration time
3.7K or
less
5s
0 to 3600/
0 to 360s
0 to 3600s
This parameter is the acceleration time of the main speed during
dancer control. It will not function as second acceleration/
deceleration time.
{ {
5.5K,
7.5K
10s
11K,
15K
15s
45
Second
deceleration time
9999
0 to 3600/
0 to 360s
0 to 3600s
This parameter is the deceleration time of the main speed during
dancer control. It will not function as second deceleration time.
{ {
9999
128
PID action
selection
0
0 PID action is not performed
{ {
20 PID reverse action Measured value (terminal 4)
Set value (terminal 2 or [
Pr. 133 ]) 21 PID forward action
40 PID reverse action Addition method: fixed For dancer control
set point [ Pr. 133 ],
measured value
(terminal 4)
main speed (speed
command of the
operation mode) 41 PID forward action Addition method: fixed
42 PID reverse action Addition method: ratio
43 PID forward action Addition method: ratio
50 PID reverse action Deviation value signal input (L
ON
W
ORKS
, CC-
Link communication)
{
—
51 PID forward action
60 PID reverse action Set point and measured value input
(L
ON
W
ORKS
, CC-Link communication) 61 PID forward action
129
*1
PID proportional
band
100%
0.1 to
1000%
If the proportional band is narrow (parameter setting is small), the
manipulated variable varies greatly with a slight change of the
measured value. Hence, as the proportional band narrows, the
response sensitivity (gain) improves but the stability deteriorates, e.g.
hunting occurs. Gain Kp = 1/proportional band
{ {
9999 No proportional control
130
*1
PID integral time 1s
0.1 to
3600s
When deviation step is input, time (Ti) is the time required for integral
(I) action to provide the same manipulated variable as the
proportional (P) action. As the integral time decreases, the set point is
reached earlier but hunting occurs more easily.
{ {
9999 No integral control.
131 PID upper limit 9999
0 to 100%
Maximum value
If the feedback value exceeds the setting, the FUP signal is output.
The maximum input (20mA/5V/10V) of the measured value (terminal
4) is equivalent to 100%.
{ {
9999 No function
132 PID lower limit 9999
0 to 100%
Minimum value
If the process value falls below the setting range, the FDN signal is
output. The maximum input (20mA/5V/10V) of the measured value
(terminal 4) is equivalent to 100%.
{ {
9999 No function
133
*1
PID action set
point
9999
0 to 100% Used to set the set point for PID control.
{ {
9999 Always 50%
E700 D700
E700 D700
E700
D700
E700
D700