Справочник Пользователя для Mitsubishi Electronics FR-A700

When motor thermal protection is activated, a fault can be output after the motor decelerates to a stop.

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Normal operation

1

The motor decelerates to stop when motor thermal protection is 
activated.

⋅ Inverter trips immediately and a fault signal output is provided at fault

occurrence.

⋅ When external thermal relay 

(OHT), motor overload trip

(electronic thermal relay function) 

(THM) or PTC thermistor

(PTC) is activated, turning ON the alarm output 2 signal (ER)

starts the motor to decelerate and a fault is provided after deceleration
to a stop.

⋅ When the ER signal turns ON, decrease load, etc. to allow the inverter

to decelerate.

⋅ At occurrence of a fault other than OHT, THM and PTC, inverter trips

immediately and a fault signal is output. 

⋅ Set "97 (positive logic) or 197 (negative logic)" in Pr. 190 to Pr. 196

(output terminal function selection) and assign the ER signal to the output
terminal.

⋅ This function is invalid during position control.

⋅ The value "0" is recommended for the system in which the motor continues running without deceleration due to a large torque

on the load side.

⋅ Changing the terminal assignment using Pr. 190 to Pr. 196 (output terminal function selection) may affect the other functions. Set

parameters after confirming the function of each terminal.

♦ Parameters referred to ♦

Output

speed

Fault output

(ALM, ALM2)

OHT

occurrence

Alarm output 2

(ER)

E.OHT
display

ON

ON

When Pr.875 = "1"