MITSUBISHI ELECTRIC FR-S520E - Manual (Page 131)

121
Operation selection function parameters
2
F
UNCT
IO
NS
(6) Adjustment procedure
91
PID upper
limit
0 to 100%
Set the upper limit. If the feedback value exceeds the
setting, the FUP signal is output. (Measured value of
4mA is equivalent to 0% and 20mA to 100%.)
- - - No function
92
PID lower
limit
0 to 100%
Set the lower limit. (If the measured value falls below
the setting, the FDN signal is output. In this case, the
measured value of 4mA is equivalent to 0% and 20mA
to 100%.)
- - - No function
93
PID action
set point for
PU operation
0 to 100%
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 source in the computer link
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%.)
94
PID
differential
time
0.01 to 10s
Time required for the differential (D) action to provide
the same measured value as that for the proportional
(P) action. As the differential time increases, greater
response is made to a deviation change.
- - - No differential control.
Parameter
Number
Name Setting Description
Turn on X14 signal.
Parameter setting
Terminal setting
Run
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.)