Mitsubishi Electric 800 Series Instruction Manual page 253

• The fault output during emergency drive operation is as follows.
Signal
Positive logic
ALM 99
ALM3 66
 Input signal operation
• During emergency drive operation in the fixed frequency mode or in the PID control mode, input signals unrelated to the
emergency drive become invalid with some exceptions.
• The table below shows functions of the signals that do not become invalid during emergency drive operation in the fixed
frequency mode or in the PID control mode.
Input signal status
Valid
Held
Always-ON
 Emergency drive status monitor
• Set "68" in Pr.52, Pr.774 to Pr.776, Pr.992 to monitor the status of the emergency drive on the operation panel.
• Description of the status monitor
Operation
panel
Emergency drive setting
indication
0 Emergency drive function setting
is not available.
1 Electronic bypass during
emergency drive operation is
2
disabled.
3
4
5
11 Electronic bypass during
emergency drive operation is
12
enabled.
13
14
15
*1
2[]
*1
3[]
*1
4[]
*1 The first digit remains the same as the previous numerical value (fault condition).
*2 "A certain alarm" means a protective function disabled during emergency drive shown in the tables on
CAUTION
• When the emergency drive operation is performed, the operation is continued or the retry is repeated even when a fault occurs, which
may damage or burn the inverter and motor. Before restarting the normal operation after using this function, make sure that the inverter
and motor have no fault. Any damage of the inverter or the motor caused by using the emergency drive function is not covered by the
warranty even within the guarantee period.
252
5. PARAMETERS
5.7 (H) Protective function parameter
Pr.190 to Pr.196 setting
Negative logic
199
166
Fixed frequency mode
OH, TRG, TRC, X51, RES, X70, X71
RT, X18, SQ, X84
—
—
During normal operation
During emergency drive
operation
During normal operation
During emergency drive
operation
Electronic bypass is started during emergency drive (during acceleration/deceleration to
the switchover frequency).
During electronic bypass during emergency drive (waiting during the interlock time).
During commercial power supply operation during emergency drive
Turns ON at the occurrence of a fault that causes the above-mentioned "retry"
or "output shutoff" during emergency drive operation.
Output when a fault occurs during emergency drive operation.
During emergency drive operation, if a fault that does not activate any
protective function occurs, the signal turns ON for 3 s and then turns OFF.
OH, TRG, TRC, X51, RES, X70, X71
RT, X18, SQ, X64, X65, X66, X67, X79, X84
X14, X77, X78, X80
Description
Emergency drive operating status
Operating properly
A certain alarm is occurring.
A critical fault is occurring. The operation is being
continued by the retry.
A critical fault is occurring. The continuous operation is
not allowed due to output shutoff.
Operating properly
A certain alarm is occurring.
A critical fault is occurring. The operation is being
continued by the retry.
A critical fault is occurring. The continuous operation is
not allowed due to output shutoff.
Description
PID control mode
*2
*2
page 251.