Mitsubishi Electric FR-F800, Инструкция по эксплуатации

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Parameters (A) Application parameters
FR-F800 5 - 399
PID output hold (Pr. 1361 and Pr. 1362)
●
The manipulated amount (PID output) can be fixed when the fluctuation of the deviation is small.
This function eliminates unnecessary acceleration/deceleration, which is effective to reduce the
power consumption.
●
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 kept during the detection time for PID output hold.
1380
A455
PID input pressure
warning set point change
amount
5% 0 to 100%
Set the set point change amount when the pressure
reaches the input pressure warning level.
1381
A456
PID input pressure fault
operation selection
0
0
The protective function (E.PID) for the input pressure
fault is activated.
1
A deceleration stop is performed when the input
pressure fault occurs.
I003061E
Fig. 5-195: PID output hold
NOTES 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 cancelled.
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,
and during the sleep boost.
Pr. Name
Initial
value
Setting range Description
Output value
Pr. 1361
Time
Set point
Measured value
Detection time for PID output hold
Manipulated
amount
PID output is held.
Pr. 1361
PID output hold range
(Pr. 1362)
Time
Deviation
Detection time for PID output hold