Mitsubishi Electric FR-D720-008 Instruction Manual page 124

Function assignment of external terminal and control
(3) Fault output signal (ALM signal)
Inverter fault occurrence
(Trip)
Output
frequency
ALM OFF
ON
RES ON OFF
Reset ON
REMARKS
The ALM signal is assigned to the ABC contact in the initial setting. By setting "99 (positive logic) or 199 (negative logic) in
Pr.190 or Pr.192 (output terminal function selection), the ALM signal can be assigned to the other signal.
Refer to page 248 for the inverter fault description.
(4) Fault output 3 (power-off signal) (Y91 signal)
The Y91 signal is output at occurrence of a fault attributable to the failure of the inverter circuit or a fault caused by a wiring
mistake.
When using the Y91 signal, set "91 (positive logic)" or "191 (negative logic)" to Pr.190 or Pr.192 (output terminal function
selection) to assign the function to the output terminal.
The following table indicates the faults that will output the Y91 signal. (Refer to page 247 for the fault description.)
Operation Panel
Indication
E. BE
E.GF
E.LF
E.PE
E.CPU
E.IOH
REMARKS
At occurrence of output side earth (ground) fault overcurrent (E.GF), overcurrent trip during acceleration(E.OC1) may be
displayed. At this time, the Y91 signal is output.
Parameters referred to
Pr. 13 Starting frequency
120
Reset processing
(about 1s)
Name
Brake transistor alarm detection
Output side earth (ground) fault overcurrent at
start
Output phase loss
Parameter storage device fault
CPU fault
Inrush current limit circuit fault
Refer to page 96
If the inverter comes to trip, the ALM signal is output.
Time