Mitsubishi FR - S500 Instruction Manual page 115

Parameter
Name
Number
PID integral
90
time
PID upper
91
limit
PID lower
92
limit
PID action
93 set point for
PU operation
PID
94 differential
time
(6) Adjustment procedure
Parameter setting
Terminal setting
Turn on X14 signal.
Run
Setting
Time required for the integral (I) action to provide the
same manipulated variable as that for the proportional
0.1 to 999s
(P) action. As the integral time decreases, the set point
is reached earlier but hunting occurs more easily.
- - - No integral control.
Set the upper limit. If the feedback value exceeds the
0 to 100% setting, the FUP signal is output. (Process value of
4mA 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. In this case, the
0 to 100%
process value of 4mA is equivalent to 0% and 20mA to
100%.)
- - - No function
Valid only when Pr. 79 = "3" (n9 = 0 for computer link
operation) under the PU command in the PU operation
or PU/external combined mode. (When the computer
has the speed command write in the computer link
0 to 100%
operation mode (NET))
For external operation, the voltage across 2-5 is the
set point.
(C3 value is equivalent to 0% and C4 value to 100%.)
Time required for the differential (D) action to provide
the same process value as that for the proportional (P)
0.01 to 10s
action. As the differential time increases, greater
response is made to a deviation change.
- - - No differential control.
Adjust the PID control parameters, Pr. 88 to Pr. 94.
Set the I/O terminals for PID control.
(Use Pr. 64 and Pr. 65 (output terminal function selection) to set the
FUP and FDN signals.)
(Use any of Pr. 60 to Pr. 63 (input terminal function selection) to set
the X14 signal.)
Description
106