Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Parameter Special operation
FR-D700 SC EC 6 - 255
6.19.2 Dancer control (Pr. 44, Pr. 45, Pr. 128 to Pr. 134)
Performs PID control by feedbacking the position detection of the dancer roller, controlling the
dancer roller is in thespecified position.
The above parameters can be set when Pr. 160 = 0.
Pr. 129, Pr. 130, Pr. 133 and Pr. 134 can be set during operation. They can also be set
independently of the operation mode.
Pr. No. Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
44
Second
acceleration/
deceleration
time
FR-D720S-
008SC to
100SC,
FR-D740-
080SC
or less
5s
0–3600s
This parameter is the acceleration time of the main
speed during dancer control. It will not function as
second acceleration/deceleration time.
59
73
79
178–182
190/192/
197
561
C2 (Pr. 902)
–
C7 (Pr. 905)
Remote func-
tion selection
Analog input
selection
Operation
mode selection
Input terminal
function selec-
tion
Output terminal
function selec-
tion)
PTC thermi-
stor protection
level
Frequency set-
ting voltage
(current) bias/
gain 6.5.3
6.15.1
6.17.1
6.9.1
6.9.5
6.7.1
6.15.3
FR-D740-
120SC
and 160SC
10s
45
Second
deceleration
time
9999
0–3600s 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
42 PID reverse action Addition
method:
ratio
43
PID forward
action
129
PID propor-
tional
band
100%
0.1
–
1000%
If the proportional band is narrow (parameter set-
ting 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 stabil-
ity deteriorates, e.g. hunting occurs.
Gain Kp = 1/proportional band
9999 No proportional control
130
PID integral
time
1s
0.1
–
3600s
For deviation step input, time (Ti) required for only
the integral (I) action to provide the same manipu-
lated variable as that for 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
0–100%
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 equiva-
lent to 100%.
9999 No function
132
PID lower
limit
9999
0–100%
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
PID action
set point
9999
0–100% Used to set the set point for PID control.
9999 Always 50%
134
PID differen-
tial time
9999
0.01
–
10s
For deviation ramp input, time (Td) required for
providing only the manipulated variable for the pro-
portional (P) action. As the differential time
increases, greater response is made to a deviation
change.
9999 No differential control.