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Special operation and speed control
(8) PID monitor function
The PID control set point, measured value and deviation value can be displayed on the operation panel and output from
terminal FM.
In the deviation monitor, a negative percent can be displayed as an integer, like 0% as 1000 and so on. (The deviation
monitor cannot be output from the terminal FM.)
For each monitor, set the following value in Pr. 52 DU/PU main display data selection and Pr. 54 FM terminal function selection.
* 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 the terminal FM
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
Setting Monitor Description
Minimum
Increments ∗
Terminal FM
Full Scale ∗
Remarks
52 PID set point
0.1
100%/C42(Pr. 934)
or C44(Pr. 935)
—
53 PID measured value
0.1
54 PID deviation
0.1 —
Value cannot be set to Pr. 54.
Displays 1000 when the PID deviation is 0%.
Parameter setting
Adjust the PID control parameters, Pr. 127 to Pr. 134, Pr. 553, Pr. 554 or
Pr. 575 to Pr. 577.
Terminal setting
Set the I/O terminals for PID control (Pr. 178 to Pr. 182 (input terminal
function selection), Pr. 190 and Pr. 192 (output terminal function selection))
Turn ON the X14 signal.
When X14 signal is not assigned, setting a value other than "0" in Pr.
128 activates PID operation.
Operation
