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Special operation and frequency control
(7)
PID output suspension function (SLEEP function) (SLEEP signal, Pr. 575 to Pr. 577 )
The inverter stops operation if the output frequency after PID operation 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. This function can reduce
energy consumption in the low-efficiency, low-speed range.
Pr.554 Setting
0 (Initial value)
1
Motor coasts to a stop at the
2
3
10
11
Motor 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 or Pr. 192 (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 motor accelerates again
to continue PID control. Pr. 576 Output interruption detection level is invalid during deceleration.
256
SLEEP Function
start of SLEEP operation
When Pr. 554 = "0 to 3", reverse action (Pr. 128 = "20")
Less than Pr. 575
Pr. 575 or more SLEEP period
When Pr. 554 = "10 to 13", reverse action (Pr. 128 = "20")
Less than Pr. 575
Pr. 575 or more
FUP Signal, FDN Signal
Only signal output
Signal output + stop by fault (E.PID)
Only signal output
Signal output + stop by fault (E.PID)
Only signal output
Signal output + stop by fault (E.PID)
Only signal output
Signal output + stop by fault (E.PID)
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
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