Mitsubishi Electronics FR-F700-NA ユーザーズマニュアル

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PID control
4
4.20.3 Pre-charge function (Pr.760 to Pr. 769)
This function is to drive the motor at a certain speed before starting PID control.  The motor is operated at Pr. 127
PID control automatic switchover frequency
 at start until a pre-charge ending condition is satisfied. PID control starts
after a pre-charge ending condition is satisfied. (This function is useful for a pump with a long hose. Without this
function, PID control would start before the pump is filled with water, and proper control would not be performed. )
Pre-charge function is also valid for a start after the PID output suspension (SLEEP). PID output suspension
(SLEEP) function is not performed until the pre-charge operation ends.
Parameter 
Number
Name
Initial 
Value
Setting 
Range
Description
760
Pre-charge fault 
selection
0
0
When the pre-charged amount exceeds Pr. 763 or the pre-
charged time exceeds Pr. 764, the output is immediately 
shutoff, and the fault (E.PCH) is output.
1
When the pre-charged amount exceeds Pr. 763 or the pre-
charged time exceeds Pr. 764, the motor decelerates to stop, 
and the fault (E.PCH) is output.
761
Pre-charge ending 
level
9999
0 to 100% 
Set the measurement level to end the pre-charge operation. 
9999
Without pre-charge ending level
762
Pre-charge ending time
9999
0.0 to 3600s
Set the time to end the pre-charge operation. 
9999
Without pre-charge ending time
763
Pre-charge upper 
detection level
9999
0 to 100% 
Set the upper limit for the pre-charged amount. If the pre-
charged amount exceeds the set level, the fault (E.PCH) is 
output. 
9999
Without pre-charge  upper detection level 
764
Pre-charge time limit
9999
0.0 to 3600s
Set the time limit for the pre-charge operation. If the pre-
charged time exceeds the set level, the fault (E.PCH) is output. 
9999
Without pre-charge time limit
765
Second pre-charge 
fault selection
0
0
When the pre-charged amount exceeds Pr. 768 or the pre-
charged time exceeds Pr. 769 while the RT signal is ON, the 
fault (E.PCH) is output.
1
When the pre-charged amount exceeds Pr. 768 or the pre-
charged time exceeds Pr. 769 while the RT signal is ON, the 
motor decelerates to stop, and the fault (E.PCH) is output.
766
Second pre-charge 
ending level
9999
0 to 100% 
Set the measurement level to end the pre-charge operation, 
which is performed while the RT signal is ON. 
9999
Without second pre-charge ending level
767
Second pre-charge 
ending time
9999
0.0 to 3600s
Set the time to end the pre-charge operation, which is 
performed while the RT signal is ON. 
9999
Without second pre-charge ending time 
768
Second pre-charge 
upper detection level
9999
0 to 100% 
Set the upper limit for the pre-charged amount, which is 
charged while the RT signal is ON. If the pre-charged amount 
exceeds the set level, the fault (E.PCH) is output.
9999
Without second pre-charge ending level
769
Second pre-charge 
time limit
9999
0.0 to 3600s
Set the time limit for the pre-charge operation, which is 
performed while the RT signal is ON. If the pre-charged time 
exceeds the set level, the fault (E.PCH) is output.
9999
Without second pre-charge time limit
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 190)
...
Specifications differ according to the date assembled. 
to check the SERIAL number.
*1
Setting values of Pr. 761, Pr. 763, Pr. 766, Pr. 768 are without unit when "9999" is set to both of C42(Pr. 934) and C44(Pr. 935)