Fault Definition (Pr. 875) - Mitsubishi Electric FR-A700 Instruction Manual

Operation setting at alarm occurrence
6.17.6

Fault definition (Pr. 875)

When motor thermal protection is activated, an alarm can be output after the motor decelerates
to a stop.
Pr.
Name
No.
875
Fault definition
Output is immediately shutoff at occurrence of any alarm (PR. 875 = 0, initial value)
Output is immediately shutoff and an alarm output is provided at alarm occurrence.
The motor decelerates to stop when motor thermal protection is activated (Pr. 875 = 1)
When external thermal relay (E.OHT/OHT), motor overload shutoff (electronic thermal relay
function) (E.THM/THM) or PTC thermistor (E.PTC/PTC) is activated, turning on the minor fault
output 2 signal (ER) starts the motor to decelerate and an alarm 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 an alarm other than OHT, THM and PTC, output is immediately shut off and an
alarm is output.
Set "97 (source logic) or 197 (sink 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.
Fig. 6-172: Alarm output (Pr. 875 = 1)
NOTES
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 selec-
tion) may affect the other functions. Make setting after confirming the function of each
terminal.
6 - 358
Initial Setting
Description
Value Range
0 Normal operation
0
The motor decelerates to stop when
1
motor thermal protection is activated.
Output Speed
Alarm output
(ALM, ALM 2)
Minor fault output 2
(ER)
Parameters referred to
ON
ON
OHT E.OHT
occurrence display
Parameter
Refer to
Section
190–196 Output terminal 6.14.5
function selection
I001607E