Mitsubishi Electric F700 Instruction Manual page 96

Parameter
Name
PID control
automatic
127
switchover
frequency
128
PID action selection
PID proportional
129
band
130
PID integral time
131
PID upper limit
132
PID lower limit
133
PID action set point
Incre Initial
Range
ments Value
Set the frequency at which the control is
0 to 400Hz
automatically changed to PID control.
0.01Hz 9999
9999 Without PID automatic switchover function
10, 110 PID reverse action
11, 111 PID forward action
20, 120 PID reverse action
21, 121 PID forward action
1 10
50 PID reverse action
51 PID forward action
60 PID reverse action
61 PID forward action
If the proportional band is narrow
(parameter setting is small), the
manipulated variable varies greatly with a
slight change of the measured value.
0.1 to 1000% Hence, as the proportional band narrows,
0.1% 100%
the response sensitivity (gain) improves but
the stability deteriorates, e.g. hunting
occurs.
Gain K = 1/proportional band
9999 No proportional control
When deviation step is input, time (Ti) is the
time required for integral (I) action to
provide the same manipulated variable as
0.1 to 3600s
the proportional (P) action. As the integral
0.1s 1s
time decreases, the set point is reached
earlier but hunting occurs more easily.
9999 No integral control.
Set the upper limit value.
If the feedback value exceeds the setting,
0 to 100% the FUP signal is output. The maximum
0.1% 9999
input (20mA/5V/10V) of the measured
value (terminal 4) is equivalent to 100%.
9999 No function
Set the lower limit value.
If the measured value falls below the
setting range, the FDN signal is output.
0 to 100%
The maximum input (20mA/5V/10V) of the
0.1% 9999
measured value (terminal 4) is equivalent
to 100%.
9999 No function
0 to 100% Used to set the set point for PID control.
0.01% 9999
9999 Terminal 2 input voltage is the set point.
Parameter list
Para
meter
copy
Description
Deviation value
signal (terminal 1)
Measured value
input (terminal 4)
Set value (terminal 2
or Pr. 133)
Deviation value
signal input
(L W , CC-Link
ON ORKS
communication)
Measured value, set
value input
(L W , CC-Link
ON ORKS
communication)
All
Para
para
meter
meter
clear
clear
: enabled
× : disabled
4
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