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PID control
4
PARAMETERS
(9) 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.
⋅ 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).
* 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.
Pr.554 Setting SLEEP Function FUP Signal, FDN Signal Y48 Signal
0 (Initial value)
Inverter coasts to a stop at the
start of SLEEP operation
Only signal output
Only signal output
1 Signal output + stop by fault (E.PID)
2 Only signal output
Signal output + stop by fault
(E.PID)
3 Signal output + stop by fault (E.PID)
10
Inverter decelerates to a stop at
the start of SLEEP operation
Only signal output
Only signal output
11 Signal output + stop by fault (E.PID)
12 Only signal output
Signal output + stop by fault
(E.PID)
13 Signal output + stop by fault (E.PID)
Output frequency
Deviation
Pr.576
Pr.577 - 1000%
RUN
Time
ON
OFF
SLEEP
Less than Pr. 575
Pr. 575 or more SLEEP period
PID
Cancel
level
When Pr.554 = "0 to 3", reverse action (Pr.128 = "10")
Output frequency
Deviation
When
Pr.554 = "10 to 13", reverse action (Pr.128 = "10")
Pr.576
Pr.577 - 1000%
RUN
Time
ON
OFF
SLEEP
Less than Pr. 575
Pr. 575 or more
SLEEP period
PID
Cancel
level
Decelerates
to a stop*