Mitsubishi Electric F700 Instruction Manual page 210

(9) PID output interruption function (SLEEP function) (SLEEP signal, Pr. 575 to Pr. 577 )
· If the output frequency after PID operation remains lower than the Pr. 576 Output interruption detection level for
longer than the time set in Pr. 575 Output interruption detection time, the inverter stops operation. The energy
consumption in the inefficient low speed region can be reduced.
· When the deviation (= set point − measured value) reaches PID output interruption release level (Pr. 577 setting
− 1000%) when the PID output interruption function is activated, PID output interruption function is released and
PID control operation is automatically resumed.
· PID output suspension signal (SLEEP) is output when the PID output interruption function is activated. At this
time, the inverter running signal (RUN) turns off and the PID control activated signal (PID) turns on.
Reverse action (Pr. 128 = 10)
Deviation
Pr.577 -1000%
Output
frequency
Pr.576
RUN
PID
SLEEP
(10) Timing diagram
· When using four motors in the basic system (Pr. 579 = "0")
STF
(STR)
RO2
RO3
RO4
Pr. 126
Inverter
M1
operation
M2
M3
M4
Less than Pr. 575
Pr. 575 or more
Pr. 590
Pr. 590 Pr. 590
Pr. 126 Pr. 126
Pr. 586
Pr. 584
Pr. 585
Commercial
power supply
Commercial
power supply
Commercial
power supply
Special operation and frequency setting
SLEEP period
OFF
ON
Pr. 591
Pr. 591 Pr. 591
Pr. 589 Pr. 588
Pr. 587
C2 (902) C2 (902) C2 (902)
operation
operation
operation
Cancel level
Time
Pr. 575
Pr. 576
Sleep
203
3