Mitsubishi Electric FR-F820-04750 Instruction Manual page 545

Parameters
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. 762 "Pre-charge
ending time".
● 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.
NOTES 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")
Fig. 5-183:
FR-F800
Measured value [PSI]
Ending level
Pr. 761
Output frequency [Hz]
Pr. 127
0 Hz
STF
Y49
Y51
ALM
Reaching of pre-charge time limit
Pr. 764
E.PCH
(A) Application parameters
Time
When Pr. 760 = "0",
output is immediately shut off.
Time
I002704E
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