Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Parameter Parameter overview
FR-D700 SC EC 6 - 15
Func-
tion
Parameter
Name
Incre-
ments
Initial
value
Setting
range
Description
Para-
meter
copy
Para-
meter
clear
All
Para-
meter
clear
Refer
to
page
Related
parameter
s
✔
: enabled
—: disabled
PID control
129 PID proportional band 0.1% 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 meas-
ured 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
✔ ✔ ✔
6-242
9999 No proportional control.
130 PID integral time 0.1 s 1s
0.1–3600s
Time required for only the integral
(I) action to provide the same
manipulated 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 0.1% 9999
0–100%
Set the upper limit value.
If the feedback value exceeds the
setting, the FUP signal is output.
The maximum input (20mA/5V/
10V) of the measured value (ter-
minal 4) is equivalent to 100%.
✔ ✔ ✔
9999 No function
132 PID lower limit 0.1% 9999
0–100%
Set the lower limit 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 0.01% 9999
0–100%
Used to set the set point for PID
control in the PU operation mode.
✔ ✔ ✔
9999 Terminal 2 input is the set point.
134 PID differential time 0.01s 9999
0.01–10s
Time required for only the differ-
ential (D) action to provide the
same manipulated variable as that
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
0.1s 1 s
0–3600s
The inverter stops operation if the
output frequency after PID opera-
tion 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
0.01Hz 0Hz 0–400Hz
Set the frequency at which the out-
put interruption processing is per-
formed.
✔ ✔ ✔
577
Output interruption
cancel level
0.1% 1000% 900–1100%
Set the level (Pr. 577 minus
1000%) at which the PID output
interruption function is canceled.
✔ ✔ ✔
Tab. 6-1: Parameter overview (15)