Mitsubishi Electric 800 Series Instruction Manual page 495

(A) Application parameters
Input/output signals
• Assigning the PID control valid terminal signal (X14) to the input terminal by Pr.178 to Pr.189 (Input terminal function
selection) enables PID control to be performed only when the X14 signal is turned ON. When the X14 signal is OFF,
regular inverter running is performed without PID action. (When the X14 signal is not assigned, PID control is enabled only
by setting Pr.128 ≠ "0".)
• Input signal
Signal Function
X14 PID control valid terminal
Second PID control valid
X80
terminal
PID forward/reverse
X64
action switchover
Second PID forward/
X79
reverse action switchover
X72 PID P control switchover
Second PID P control
X73
switchover
• Output signal
Signal Function
FUP PID upper limit
FUP2 Second PID upper limit
FDN PID lower limit
FDN2 Second PID lower limit
PID forward/reverse
RL
rotation output
Second PID forward/
RL2
reverse rotation output
During PID control
PID
activated
Second During PID
PID2
control activated
SLEEP PID output interruption
During second PID output
SLEEP2
shutoff
NOTE
• Changing the terminal functions with Pr.178 to Pr.189 and Pr.190 to Pr.196 may affect other functions. Set parameters after
confirming the function of each terminal.
494
PARAMETERS
Pr.178 to Pr.189
setting
14
When the signal is assigned to the input terminal, PID control is enabled
when the signal is ON.
80
64
PID control is switched between forward and reverse action without
changing parameters by turning ON the signal.
79
72
Integral and differential values can be reset by turning the signal ON.
73
Pr.190 to Pr.196
setting value
positive negative
logic logic
15 115
Output when the measured value signal exceeds Pr.131 PID upper limit
201 301 (Pr.1143 Second PID upper limit).
14 114 Output when the measured value signal falls below Pr.132 PID lower
limit (Pr.1144 Second PID lower limit).
200 300
16 116 "Hi" is output when the output display of the parameter unit is forward
rotation (FWD), and "Low" is output when the display is reverse rotation
(REV) and stop (STOP).
202 302
Turns ON during PID control.
47 147
When the PID calculation result is reflected to the output frequency
(Pr.128 < "2000"), the PID signal turns OFF at turn OFF of the start signal.
When the PID calculation result is not reflected to the output frequency
203 303
(Pr.128  "2000"), the PID signal turns ON during PID calculation
regardless of the start signal status.
70 170
Set Pr.575 Output interruption detection time (Pr.1147 Second output
interruption detection time) "9999". This signal turns ON when the
204 304
PID output suspension function is activated.
Description
Description