Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 173 / 608

Parameter Parameter overview
FR-E700 SC EC/ENE 6 - 19
Func-
tion
Parameter
Name
Incre-
ments
Initial
Value
Setting
Range
Description
Para-
meter-
Copy
Para-
meter
Clear
All
Para-
meter
Clear Refer
to
Page
Rela
te
d
Paramet
ers
✔
: Enabled
—: Disabled
PID c
on
tr
ol
127
PID control automatic
switchover frequency
0.01 Hz 9999
0–400 Hz
Set the frequency at which the control is
automatically changed to PID control.
✔ ✔ ✔
6-293
9999 Without PID automatic switchover function
128 PID action selection 1 0
0 PID control invalid
✔ ✔ ✔
20 PID reverse action Measured value input
(terminal 4)
Set value
(terminal 2 or Pr. 133)
21 PID forward action
40–43 Dancer control
50 PID reverse action Deviation value signal
input
(CC-Link
communication)
51 PID forward action
60 PID reverse action Measured value and set
point input
(CC-Link
communication)
61 PID forward action
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 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 PID integral time 0.1 s 1 s
0.1–360 0s
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
(20 mA/5 V/10 V) of the measured value
(terminal 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 (20 mA/5 V/10 V) 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 No function
134 PID differential time 0.01 s 9999
0.01–10.00 s
Time required for only the differential (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.
Tab. 6-1: Parameter overview (19)