Fault Definition - Mitsubishi Electric 800 Series Instruction Manual

5.10.2

Fault definition

Fault output can be done after deceleration stop when motor thermal protection is activated
Pr. Name
875
Fault definition
H030
Output shutoff at activation of any protective function (Pr.875 = "0" initial
value)
• At activation of a protective function, output is shutoff, 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 displayed, 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.
When Pr.875 = "1"
Output
frequency
Fault output
(ALM, ALM2)
ON
Alarm output 2
(ER)
E.OHT
occurrence
NOTE
• Regardless of the Pr.875 setting, when the protective function is operating during position control, output is immediately shut
off. (No deceleration stop)
• For systems with a large load-side torque that prevents deceleration, setting value "0" is recommended.
• 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)
Initial Setting
value range
0
0
1
Time
ON
E.OHT
display
page 370
(H) Protective function parameter
Description
Normal operation
Decelerates to stop at activation of motor thermal
protection.
PARAMETERS
5
GROUP
H
323