Mitsubishi Electric FR-A740-00023 Instruction Manual page 246

Function assignment of external terminal and control
(5) Alarm output signal (ALM, ALM2 signal)
Inverter alarm occurrence
(output shutoff)
ON OFF
ALM
ON
ALM2
ON OFF
RES
Reset ON
(6) Input MC shutoff signal (Y91 signal)
⋅ The Y91 signal is output at occurrence of an alarm attributable to the failure of the inverter circuit or an alarm
caused by a wiring mistake.
⋅ When using the Y91 signal, set "91 (positive logic)" or "191 (negative logic)" to any of Pr. 190 to Pr. 196 (output
terminal function selection) to assign the function to the output terminal.
⋅ The following table indicates the alarms that will output the Y91 signal. (Refer to page 394 for the alarm description.)
No.
1 Inrush current limit circuit alarm (E.IOH)
2 CPU error (E.CPU)
3 CPU error (E.6)
4 CPU error (E.7)
5 Parameter storage device alarm (E.PE)
6 Parameter storage device alarm (E.PE2)
7 24VDC power output short circuit (E.P24)
Operation panel power supply short circuit, RS-485 terminal
8
power supply short circuit(E.CTE)
9 Output side earth(ground) fault overcurrent protection(E.GF)
10 Output phase failure (E.LF)
11 Brake transistor alarm detection (E.BE)
ｓ
♦ Parameters referred to ♦
Pr. 13 Starting frequency
Pr. 76 Alarm code output selection
236
Time
OFF
Reset processing
(about 1s)
Alarm Description
Refer to page 169 .
Refer to page 263
⋅ If the inverter comes to an alarm stop, the ALM and ALM2
signals are output.
⋅ The ALM2 signal remains on during a reset period after
alarm occurrence.
⋅ When using the ALM2 signal, set "94 (positive logic)" or "194
(negative logic)" to any of Pr. 190 to Pr. 196 (output terminal
function selection) to assign the function to the output
terminal.
⋅ The ALM signal is assigned to the A1B1C1 contact in the
initial setting.
REMARKS
Refer to page 394 for the inverter alarm description.