Mitsubishi Electric FR-A800, Instruction Manual

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(H) Protective function parameter Parameters
5 - 302
5.10.2 Fault definition
Fault output can be done after deceleration stop when motor thermal protection is activated.
Output shutoff at activation of any protective function (Pr. 875 = "0", initial value)
At activation of a protective function, output is shut off, and the alarm output 2 signal (ER) and the
fault signal (ALM) are output.
Deceleration stop at motor thermal protection activation (Pr. 875 = "1")
●
At activation of the external thermal relay (E.OHT), motor load (electronic thermal O/L relay)
(E.THM) and PTC thermistor (E.PTC) protective functions, the alarm output 2 (ER) signal is dis-
played, and the motor decelerates to stop. After it stops, a fault signal (ALM) is output.
●
When the ER signal comes ON, reduce the load or take other measures to allow the inverter to
decelerate.
●
During fault occurrence aside from the E.OHT, E.THM and E.PTC, the output is immediately shut
off, and the fault signal (ALM) is output.
●
To use the ER signal, set "97 (positive logic)" or "197 (negative logic)" in any of Pr. 190 to Pr. 196
(output terminal function selection) to assign the function to the output terminal.
Pr. Name
Initial
value
Setting
range
Description
875
H030
Fault definition 0
0 Normal operation
1
Decelerates to stop at activation of motor thermal
protection.
Fig. 5-134:
Alarm output (Pr. 875 = 1)
I002588E
NOTES Regardless of the Pr. 875 setting, when the protective function is operating during position con-
trol, output is immediately shut off. (No deceleration stop)
For systems with a large load-side torque that prevents deceleration, setting value "0" is recom-
mended.
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.
Time
When Pr. 875 = "1"
Output
frequency
Fault output
(ALM, ALM2)
Alarm output 2
(ER)
E.OHT
occurrence
E.OHT
display
ON
ON