Mitsubishi F700 Series Instruction Manual page 285

PID control
(2) Pre-charge protective function
The protective function is activated when the elapsed time or measured amount reaches the set level during the pre-
charge operation. When the level is exceeded, Y51 to Y54 signals are turned ON depending on the control method, the
output is shutoff, and the fault (E.PCH) is output. For Pr. 760 Pre-charge fault selection, select to shutoff the output and
output the fault immediately after a fault occurrence (Pr. 760 = 0), or to output the fault after deceleration to a stop (Pr.
760 = 0). (Pre-charge protective function is effective whether the pre-charge ending conditions are set or not.)
Pre-charge limit level setting is available when the following conditions are satisfied:
 Ending time (Pr. 762) < Time limit (Pr. 764)
 Ending level (Pr. 761) < Upper detection level (Pr. 763)
REMARKS
When the protective function activates (including during deceleration to stop), Y51 to Y54 signals are kept ON once they are
output whether PID control is valid or invalid. If a fault occurs after deceleration to stop, the fault is output after the stop whether
PID control is valid or invalid.
The output of signal Y51 to Y54 can be released by a reset or the retry operation.
Limit by time
Measured value[PSI]
Ending level
Pr.761
Output frequency[Hz]
Pr.127
0 Hz
STF
Output signal
Pre-charge
Y49
Y51
ALM
Limit by the measured amount
Measured value[PSI]
Pr.763
Output frequency[Hz]
Pr.127
0 Hz
STF
Pre-charge
Output signal
Y49
Y53
ALM
When Pr.760 =0,
the output is immediately
shutoff and the fault is output.
274
Pr.764
Time limit
When Pr. 760 =0,
the output is immediately
shutoff and the fault is output.
When Pr.760 =0,
the output is immediately
shutoff and the fault is output.
When Pr.760 =1, the fault is output after
deceleration to a stop.
Exceeding measured amount
E.PCH
When Pr.760 =1, the fault is output after
deceleration to a stop.
Time
When Pr. 760 =0,
the output is immediately
shutoff and the fault is output.
When Pr. 760 =1,
the fault is output after
deceleration to a stop.
Time
Over time limit
E.PCH
When Pr. 760 =1,
the fault is output after
deceleration to a stop.
Time
Time
The fault (E.PCH) is output
when the elapsed time reaches
Pr. 764 Pre-charge time limit. With
Pr. 760 Pre-charge fault selection,
you can select to shut off the
output and output the fault
immediately after E.PCH, or to
output the fault
deceleration to a stop.
Retry operation is performed at
the fault output (E.PCH) only if
Pr. 65 = "0 or 4."
The fault (E.PCH) is output
when the measured amount
exceeds Pr. 763 Pre-charge upper
detection level. With Pr. 760 Pre-
charge fault selection, you can
select to shut off the output and
output the fault immediately
after E.PCH, or to output the
fault after deceleration to a stop.
Retry operation is performed at
the fault output (E.PCH) only if
Pr. 65 = "0 or 4."
after