Mitsubishi Electric FR-D720-0.4K Instruction Manual page 125

(3) Fault output signal (ALM signal)
Inverter fault occurrence
(Trip)
Output
frequency
ALM OFF
ON
RES ON OFF
Reset processing
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, Pr.192 or Pr.197 (output terminal function selection), the ALM signal can be assigned to the other signal.
Refer to page 256 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, Pr.192 or Pr.197 (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 255 for the fault description.)
Operation Panel
Indication
E. BE Brake transistor alarm detection
Output side earth (ground) fault overcurrent at
E.GF
start
E.LF
Output phase loss
E.PE Parameter storage device fault
E.CPU
CPU fault
E.IOH Inrush current limit circuit fault
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
Function assignment of external terminal and control
Time
(about 1s)
Name
Refer to page 99
If the inverter comes to trip, the ALM signal is output.
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