Mitsubishi Electric FR-A820-04750-GF Instruction Manual page 95

• The fault output during emergency drive operation is as follows.
Pr.190 to Pr.196 setting
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 following table 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
OH, X31
Valid
X70, X71
Held RT, X9, X17, X18, MC, SQ, X84
Always-ON —
*1 The signal is available only for the FR-A800-LC.
 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
Emergency drive function
0
setting is not available.
1
2
3 Electronic bypass during
emergency drive operation is
4
disabled.
5
11
12
13
14
Electronic bypass during
emergency drive operation is
15
enabled.
*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.
Negative
logic
Turns ON at the occurrence of a fault that causes the above-mentioned "retry" or
199
"output shutoff" during emergency drive operation.
Output when a fault occurs during emergency drive operation.
166 During emergency drive operation, if a fault that does not activate any protective
function occurs, the signal turns ON for 3 seconds and then turns OFF.
Fixed frequency mode
*1 *1
, X32, X41 , TRG, TRC, X51, RES,
—
During normal operation
Emergency drive in operation
During normal operation
Emergency drive in 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
Description
PID control mode
*1
OH, X31 , X32, X41
X70, X71
RT, X9, X17, X18, MC, 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.
8
*1
, TRG, TRC, X51, RES,
*2
*2
page 7.
BCN-C22005-957