Mitsubishi Electric FR-A800, Instruction Manual

Page: 729 / 1042

Parameters (A) Application parameters
FR-A800 5 - 549
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.
●
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.
●
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.)
I002702E
Fig. 5-269: Pre-charge ending level (Pr. 761 ≠ 9999)
I002703E
Fig. 5-270: Pre-charge ending time (Pr. 762 ≠ 9999)
I002701E
Fig. 5-271: Assignment of signal X77 (Pr. 178 to Pr. 189)
STF
Y49
PID control
Ending level
Measured value [PSI]
Pr. 761
Output frequency [Hz]
Pr. 127
Time
Time
0 Hz
STF
Y49
Ending time
PID control
Time
0 Hz
Pr. 127
Output frequency [Hz]
X77
STF
Y49
PID control
Time
10 ms or more
Output frequency [Hz]
Pr. 127
0 Hz