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Special operation and frequency control
(8) PID monitor function
The PID control set value, measured value and deviation value can be displayed on the operation panel and output
from terminal CA, AM.
The deviation monitor can display a negative value on the assumption that 1000 is 0%. (The deviation monitor
cannot be output from the terminal CA, AM.)
For the monitors, set the following values in Pr. 52 DU/PU main display data selection, Pr. 54 CA terminal function
selection, and Pr. 158 AM terminal function selection.
Setting Monitor Description
52
PID set point
53
PID measured value
54
PID deviation
*
When neither of C42(Pr.934) nor C44(Pr.935) setting is "9999", minimum increment changes from % to no unit, and the full scale value for
terminal CA/AM changes from 100% to the larger value between C42(Pr.934) PID display bias coefficient and C44(Pr.935) PID display gain
coefficient. (The smaller value between C42(Pr.934) and C44(Pr.935) becomes the minimum value.)
(9) Adjustment procedure
Parameter setting
Terminal setting
Turn on the X14 signal.
Operation
226
Minimum
Terminal CA, AM
Increments*
Full Scale*
100%/C42(Pr.934) or
0.1
C44(Pr.935)
0.1
——
Adjust the PID control parameters, Pr. 127 to Pr. 134, Pr. 553, Pr. 554, and
Pr. 575 to Pr. 577.
Set the I/O terminals for PID control. (Pr. 178 to Pr. 189 (Input terminal
function selection), Pr. 190 to Pr. 196 (output terminal function selection))
PID control is available without turning X14 signal ON when Pr.128 =
"50, 51, 60, 61, 110, 111, 120, 121".
Remarks
For deviation input (Pr. 128 = 10, 11, 110, 111), the monitor
value is always displayed as 0.
Value cannot be set to Pr. 54 or Pr. 158.
The PID deviation value of 0% is displayed as 1000.

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