Mitsubishi Electric FR-A820-00046 Instruction Manual page 729

Parameters
Example of pre-charge operation
● When the measured amount reaches the pre-charge ending level (Pr. 761 "Pre-charge ending
level" ≠ "9999")
The pre-charge operation ends when the measured value reaches the Pr. 761 setting or higher,
then the PID control is performed.
Fig. 5-269:
● When the elapsed time reaches the pre-charge ending time (Pr. 762 "Pre-charge ending time" ≠
"9999")
The pre-charge operation ends when the pre-charge time reaches the Pr. 762 setting or higher,
then the PID control is performed.
Fig. 5-270:
● When the signal is input to end the pre-charge operation
When the X77 signal turns ON, the pre-charge operation ends, and the PID control starts. (If a start
command is given while the X77 signal is ON, the pre-charge operation is not performed, and PID
control starts.)
Fig. 5-271:
FR-A800
Measured value [PSI]
Pr. 761
Ending level
Output frequency [Hz]
Pr. 127
0 Hz
STF
Y49
Pre-charge ending level (Pr. 761 ≠ 9999)
Output frequency [Hz]
Pr. 127
Ending time
0 Hz
STF
Y49
Pre-charge ending time (Pr. 762 ≠ 9999)
Output frequency [Hz]
Pr. 127
0 Hz
STF
X77
Y49
Assignment of signal X77 (Pr. 178 to Pr. 189)
(A) Application parameters
PID control
PID control
PID control
10 ms or more
Time
Time
I002702E
Time
I002703E
Time
I002701E
5 - 549