Mitsubishi Electric FR-F800 Series Instruction Manual page 461

• When the deviation falls within the Pr.1362 PID output hold range and the elapsed time exceeds the Pr.1361 Detection
time for PID output hold, the manipulated amount (PID output) is fixed at the output frequency at that time.
• Even if the deviation falls out of the PID output hold range, the manipulated amount (PID output) is maintained for the
detection time for PID output hold.
Output value
Set point
Manipulated
amount
NOTE
• While the PID output is held, calculation is not performed for the P term, I term, and D term. For the P and I terms, the values
at the start of the holding period are kept. The D term is set to "0".
• When the control switches between the first PID control and second PID control, the PID output holding state is canceled.
• The PID output holding function is disabled in the following cases:
When Pr.1362 = "9999", while the PID setting is not applied to the frequency, during the sleep function, at switching to the
auxiliary motor in the multi-pump function, during PID gain tuning, during the sleep boost, during output shutoff, and while the
analog current input is lost.
 Stirring function during the PID sleep (Pr.1364 and Pr.1365)
• This function starts the pump periodically to prevent clogging of the pump while the PID output suspension function (sleep
function) is activated.
• When the sleep function is activated and the elapsed time exceeds the Pr.1365 Stirring interval time, the pump is
operated at the stirring frequency (Pr.232 or Pr.233). The pump decelerates to stop when the elapsed time exceeds the
Pr.1364 Stirring time during sleep during the sleep. The interval time count for the second time onward starts after the
previous deceleration stop is completed.
Output frequency
Pr.232
(Pr.233)
PID
SLEEP
STIR
• The rotation direction depends on the Pr.232 and Pr.233 settings.
Stirring frequency
Pr.232 setting
9999
0 to 590 Hz
9999
• The stirring signal (STIR) turns ON during the stirring operation. To use the STIR signal, set "218 (positive logic) or 318
(negative logic)" in any parameter from Pr.190 to Pr.196 (Output terminal function selection) to assign the function.
460
5. PARAMETERS
5.11 (A) Application parameters
Downloaded from ManualsNet.com
Detection time for PID output hold
(Pr.1361)
Deviation
Measured value
Interval time
(Pr.1365)
ON
ON
Rotation direction
Pr.233 setting
9999 —
Any value Command direction
0 to 590 Hz Opposite to the command direction
search engine
Detection time for PID output hold
(Pr.1361)
PID output is held.
Stirring time Interval time
(Pr.1364) (Pr.1365)
ON
The stirring function during the PID
sleep is disabled.
Pr.232 frequency is used for
stirring.
Pr.233 frequency is used for
stirring.
PID output hold range (Pr.1362)
Time
Time
Stirring time
(Pr.1364)
Time
ON
Remarks