Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Parameter Special operation
FR-D700 SC EC 6 - 243
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
127
PID control
automatic
switchover
frequency
9999
0–400Hz
Set the frequency at which the control is automatically
changed to PID control.
59
73
79
178–182
190/192/
197
261
561
C2 (Pr. 902)
–
C7 (Pr. 905)
Remote function
selection
Analog input
selection
Operation mode
selection
Input terminal
function selection
Output terminal
function selection
Power failure stop
selection
PTC thermistor
protection level
Frequency
setting voltage
(current) bias/
gain 6.5.3
6.15.1
6.17.1
6.9.1
6.9.5
6.11.2
6.7.1
6.15.3
9999 Without PID automatic switchover function
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), meas-
ured value (terminal 4)
main speed (frequency
command of the opera-
tion 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 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. hunt-
ing occurs. Gain Kp= 1/proportional band
9999 No proportional control
130
PID integral
time
1 s
0,1
–
3600s
For deviation step input, time (Ti) required for only the
integral (I) action to provide the same manipulated var-
iable as that for the proportional (P) action. As the inte-
gral 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 sig-
nal 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
0–100%
Minimum frequency
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 Terminal 2 input is the set point.
134
PID differen-
tial time
9999
0.01
–
10s
For deviation ramp input, time (Td) required for provid-
ing only the manipulated variable for the proportional
(P) action. As the differential time increases, greater
response is made to a deviation change.
9999 No differential control.
575
Output
interruption
detection time
1 s
0.1
–
3600 s
The inverter stops operation if the output frequency
after PID operation remains at less than the Pr. 576
setting for longer than the time set in Pr. 575.
9999 Without output interruption function
576
Output
interruption
detection level
0Hz 0–400Hz
Set the frequency at which the output interruption
processing is performed.
577
Output
interruption
cancel level
1000%
900
–
1100%
Set the level (Pr. 577 minus 1000%) at which the PID
output interruption function is canceled.