Mitsubishi Electric 800 Series Instruction Manual page 409

 PID output suspension function (SLEEP function) (SLEEP signal, Pr.575
to Pr.577)
• When a status where the output frequency after PID calculation is less than Pr.576 Output interruption detection level
has continued for the time set in Pr.575 Output interruption detection time or longer, inverter running is suspended. This
allows the amount of energy consumed in the inefficient low-speed range to be reduced.
• When the deviation (for instance, the set point - measured value) reaches the PID output shutoff release level (Pr.577
setting value -1000%) while the PID output suspension function is activated, the PID output suspension function is
released, and PID control operation is automatically restarted.
• Whether to allow motor to coast to a stop or perform a deceleration stop when SLEEP operation is started can be selected
using Pr.554.
• While the PID output suspension function is activated, the PID output interruption signal (SLEEP) is output. During this
time, the inverter running signal (RUN) turns OFF and the During PID control activated signal (PID) turns ON.
• For the terminal used for the SLEEP signal, set "70 (positive logic)" or "170 (negative logic)" in any of Pr.190 to Pr.196
(Output terminal function selection).
Pr.577 - 1000%
Output frequency
Pr.577 - 1000%
Output frequency
*1 When the PID output shutoff release level is reached during a deceleration stop, output shutoff is released, operation is re-accelerated and PID
control is continued. During deceleration Pr.576 Output interruption detection level is invalid.
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5. PARAMETERS
5.11 (A) Application parameters
When Pr.554="0 to 7", reverse operation (Pr.128="10")
Deviation
Pr.576
Less than Pr.575
RUN
PID
SLEEP
When Pr.554="10 to 17", reverse operation (Pr.128="10")
Deviation
Pr.576
Less than Pr.575
RUN
PID
SLEEP
Pr.575 or more SLEEP period
OFF
ON
∗1
Deceleration stop
Pr.575 or more SLEEP period
OFF
ON
Cancel
level
Time
Cancel
level
Time