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Operation setting at fault occurrence
4
PARAMETERS
4.18.6 Fault definition (Pr. 875)
When motor thermal protection is activated, a fault can be output after the motor decelerates to a stop.
Parameter
Number
Name
Initial
Value
Setting
Range
Description
875 Fault definition 0
0 Normal operation
1
The motor decelerates to stop when motor thermal protection is
activated.
(1) Inverter trips immediately at occurrence of any fault
(setting value is "0", initial value)
⋅ Inverter trips immediately and a fault signal output is provided at fault
occurrence.
(2) The motor decelerates to stop when motor thermal
protection is activated (setting value is "1")
⋅ 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.
CAUTION
⋅ 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 ♦
Pr. 190 to Pr. 196 (output terminal function selection) Refer to page 239
Output
speed
Fault output
(ALM, ALM2)
OHT
occurrence
A
larm output 2
(ER)
E.OHT
display
ON
ON
When Pr.875 = "1"