Mitsubishi Electric FR-D720S SC EC, Instruction Manual

Page: 398 / 512

Special operation Parameter
6 - 248
I/O signals and parameter setting
Set "20 or 21" in Pr. 128 to perform PID operation.
Set "14" in any of Pr. 178 to Pr. 182 to assign PID control selection signal (X14) to turn the
X14 signal on. When the X14 signal is not assigned, only the Pr. 128 setting makes PID
control valid.
Enter the set point using the inverter terminal 2 or Pr. 133 and enter the measured value to
terminal 4.
NOTES
When Pr. 128 = "0" or X14 signal is off, normal inverter operation is performed without PID
action.
Turning ON/OFF of bit of the terminal, to which X14 signal is assigned through network as
RS485 communication, enables PID control.
Signal
Terminal
used
Function Description Parameter Setting
Input
X14
Depending
on
Pr. 178–182
PID control
selection Turn on X14 to perform PID
control.
Set "14" to any of
Pr. 178 to Pr. 182.
2 2
Set point input Enter the set point for PID
control .
Pr. 128 = 20, 21; Pr. 133 = 9999
0–5V ..........0–100%
Pr. 73 = 1 , 11
0–10V ........0–100% Pr. 73 = 0, 10
PU —
Set point input Set the set value (Pr. 133) from
the operation panel. Pr. 128 = 20, 21;
Pr. 133 = 0–100%
4 4
Measured
value input Input the signal from the detector
(measured value signal). Pr. 128 = 20, 21
4–20mA .....0–100%
Pr. 267 = 0
0–5V ..........0–100% Pr. 267 = 1
0–10V ........0–100% Pr. 267 = 2
Tab. 6-88: I/O signals and parameter settings (1)