Mitsubishi Electric 800 Series Instruction Manual page 428

 Operation setting at pre-charge fault
• The protective function can be activated when limit values are exceeded if the time limit is set at Pr.764 Pre-charge time
limit and the measured value limit level is set at Pr.763 Pre-charge upper detection level.
• Whether to shut off output immediately after the protective function is activated or after a deceleration stop can be selected
by Pr.760 Pre-charge fault selection.
• When the time limit is exceeded, the Pre-charge time over (Y51) signal is output. When the measured value limit level is
exceeded, the Pre-charge level over (Y53) signal is output. For the Y51 signal, set "51 (positive logic)" or "151 (negative
logic)" to Pr.190 to Pr.196 (Output terminal function selection), and for the Y53 signal, set "53 (positive logic)" or "153
(negative logic)" in Pr.190 to Pr.196 (Output terminal function selection) to assign the functions to terminals.
NOTE
• For Pr.764 Pre-charge time limit, set a value greater than Pr.762 Pre-charge ending time.
• For Pr.763 Pre-charge upper detection level, set a value greater than Pr.761 Pre-charge ending level.
• Example of protective function by time limit (Pr.760 = "0")
Measured value [PSI]
Pr.761
Output frequency [Hz]
Pr.127
0 Hz
STF
Y49
Y51
ALM
• Example of protective function measured value limit (Pr.760 = "1")
Measured value [PSI]
Pr.763
Output frequency [Hz]
Pr.127
0 Hz
STF
Y49
Y53
ALM
Ending level
Pr.764
When Pr.760 = "1",
output is shut off after the motor decelerates to a stop.
E.PCH
Time
When Pr.760 = "0",
output is immediately shut off.
Time
E.PCH
Time
Time
5.11 (A) Application parameters
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5. PARAMETERS