Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 578

• 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
SLEEP2
output 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.
 PID automatic switchover control (Pr.127)
• The system can be started up more quickly by starting up without PID control activated.
• When Pr.127 PID control automatic switchover frequency is set, the startup is made without PID control until the output
frequency reaches the Pr.127 setting. Once the PID control starts, the PID control is continued even if the output frequency
drops to Pr.127 setting or lower.
Output frequency
Pr.127
STF
PID
 Selection of action at a communication error and SLEEP function stop
selection (FUP signal, FDN signal, Y48 signal, Pr.554)
• Using Pr.554 PID signal operation selection, set the action when the measured value input exceeds the upper limit
(Pr.131 PID upper limit) or lower limit (Pr.132 PID lower limit), or when the deviation input exceeds the permissible value
(Pr.553 PID deviation limit).
• Choose whether to output the signals (FUP, FDN, Y48) only or to activate the protective function to output the inverter
shutoff.
Pr.190 to
Pr.196
setting
Positive Negative
logic logic
15 115
Output when the measured value signal exceeds Pr.131 PID upper limit
(Pr.1143 Second PID upper limit).
201 301
14 114
Output when the measured value signal exceeds 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 not 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 reflected to the output frequency (Pr.128
203 303
≥ "2000"), the PID signal turns ON regardless of the start signal status during
PID calculation.
70 170
Set Pr.575 Output interruption detection time (Pr.1147 Second output
interruption detection time) ≠ "9999". This signal turns ON when the PID
204 304
output suspension function is activated.
Without PID
control PID control
Description
Time
5. PARAMETERS
5.14 (A) Application parameters
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