Mitsubishi Electric FR-E560 Series Instruction Manual page 152

(5) Parameter setting
Parameter
Setting
Number
0
20
21
128 50
51
60
61
0.1 to
1000%
129
9999
0.1 to
3600 s
130
9999
0 to
100%
131
9999
0 to
100%
132
9999
0 to
133
100%
0.01 to
10.00 s
134
9999
(6) Adjustment procedure
Parameter setting
Terminal setting
Name
No PID action
For heating, pressure control, etc. PID reverse action
For cooling, etc.
PID action
selection
Refer to the E5NL instruction manual for details.
If the proportional band is narrow (parameter setting is
small), the manipulated variable varies greatly with a
slight change of the process value. Hence, as the
PID
proportional band narrows, the response sensitivity
proportional
(gain) improves but the stability deteriorates, e.g.
band
hunting occurs.
Gain K = 1/proportional band
No proportional control
Time required for the integral (I) action to provide the
same manipulated variable as that for the proportional
PID integral
(P) action. As the integral time decreases, the set point
time
is reached earlier but hunting occurs more easily.
No integral control.
Set the upper limit. If the feedback value exceeds the
setting, the FUP signal is output. (Process value of 4mA
Upper limit
is equivalent to 0% and 20mA to 100%.)
No function
Set the lower limit. (If the feedback value falls below the
setting, the FDN signal is output. Process value of 4mA
Lower limit
is equivalent to 0% and 20mA to 100%.)
No function
Only valid for the PU command in the PU operation or
PID action PU/external combined operation mode.
set point for For external operation, the voltage across 2-5 is the
PU set point.
operation (Pr. 902 value is equivalent to 0% and Pr. 903 value to
100%.)
Time required for the differential (D) action to provide the
same process value as that for the proportional (P)
PID
action. As the differential time increases, greater
differential
response is made to the deviation change.
time
No differential control.
Adjust the PID control parameters, Pr. 128 to Pr. 134.
Set the output terminal functions. (Pr. 190 to Pr. 192)
Run
Description
142
PARAMETERS
PID forward action