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(7) PID output suspension function (SLEEP function) (SLEEP signal, Pr. 554, Pr. 575 to Pr. 577 )
The inverter stops operation if the output frequency after PID control remains at less than the Pr. 576 Output
interruption detection level setting for longer than the time set in Pr. 575 Output interruption detection time. (At this time,
if "0 to 3" is set to Pr.554 PID signal operation selection, output is shut off (the inverter coasts to stop) when SLEEP
operation starts. If "10 to 13" is set, the inverter decelerates to a stop in the deceleration time set in Pr.8 when
SLEEP operation starts.)
This function can reduce energy consumption in the low-efficiency, low-speed range.
Pr.554 Setting
0 (Initial value)
1
Inverter coasts to a stop at the
start of SLEEP operation
2
3
10
11
Inverter decelerates to a stop at
the start of SLEEP operation
12
13
When the deviation (= set value - measured value) reaches the PID output shutoff cancel level (Pr. 577 setting -
1000%) while the PID output interruption function is on, the PID output interruption function is canceled and PID
control operation is resumed automatically.
While the PID output interruption function is on, the PID output interruption signal (SLEEP) is output. At this time,
the inverter running signal (RUN) is off and the PID control operating signal (PID) is on.
For the terminal used for the SLEEP signal output, assign the function by setting "70" (positive logic) or "170"
(negative logic) in Pr. 190 to Pr. 196 (output terminal function selection).
Deviation
Pr.577 - 1000%
Output frequency
Pr.576
RUN
PID
SLEEP
Deviation
Pr.577 - 1000%
Output frequency
Pr.576
RUN
PID
SLEEP
*
When the output rises to the output interruption cancel level during deceleration to a stop, output interruption gets cancelled, and the inverter
accelerates again to continue PID control. Pr.576 Output interruption detection level is invalid during deceleration.
SLEEP Function
Signal output + stop by fault (E.PID)
Signal output + stop by fault (E.PID)
Signal output + stop by fault (E.PID)
Signal output + stop by fault (E.PID)
When Pr.554 = "0 to 3", reverse action (Pr.128 = "10")
Less than Pr. 575
Pr. 575 or more SLEEP period
When Pr.554 = "10 to 13", reverse action (Pr.128 = "10")
Less than Pr. 575
Pr. 575 or more
Special operation and frequency control
FUP Signal, FDN Signal
Only signal output
Only signal output
Only signal output
Only signal output
OFF
ON
Decelerates
to a stop*
SLEEP period
OFF
ON
Y48 Signal
Only signal output
Signal output + stop by fault
(E.PID)
Only signal output
Signal output + stop by fault
(E.PID)
Cancel
level
Time
Cancel
level
Time
225
4

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