Fault output signal (ALM signal)
Inverter fault occurrence
The ALM signal is assigned to the terminal A, B, C in the default setting. By setting "99 (positive logic) or 199 (negative logic) in
Pr.190 to Pr.192 (output terminal function selection), the ALM signal can be assigned to the other terminal.
Refer to page 270 for the inverter fault description.
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
When using the Y91 signal, set "91 (positive logic)" or "191 (negative logic)" to any of Pr.190 to 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 269 for the fault description.)
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
Brake transistor alarm detection
Output side earth (ground) fault overcurrent
Output phase loss
Parameter storage device fault
Internal board fault
Inrush current limit circuit fault
Refer to page 104
If the inverter comes to trip, the ALM signal is output.