Fin Overheat Warning (Ohf); Low Current Signal (Loc) - Omron SYSDRIVE MX2 SERIES User Manual

5-9 Functions Relating to Protections, Warnings and Various Output Signals

Fin Overheat Warning (OHF)

This function monitors the Inverter's internal cooling fin temperature and outputs a signal when
the temperature exceeds the Cooling Fin Overheat Warning Level (C064).
Parameter
C021 to C022

Low Current Signal (LOC)

This signal is output when output current falls below the Low Current Detection Level (C039).
5
Whether this signal is always output during operation or only in constant speed operation can
be selected by Low Current Signal Output Mode Selection (C038).
Parameter
C021 to C022
* When 01 (control circuit terminal block) is selected for Frequency Reference Selection 1 (A001),
constant speed may not be recognized due to sampling. In this case, set C038 to 00 (enabled during
acceleration/deceleration and constant speed) or increase the value set in Analog Input Filter (A016).
Low Current Signal
Detection Level
(C039)
Low current (LOC) output ON
5-129
Function name
No.
Cooling Fin
C064 Overheat Warning
Level
Multi-function
Output Terminal
Selection
Multi-function
C026 Relay Output
Function Selection
Function name
No.
Low Current Signal
C038 Output Mode
Selection
Low Current Detection
C039
Level
Multi-function Output
Terminal Selection
Multi-function Relay
C026 Output Function
Selection
Output current (A)
Data
0. to 110.
Set a temperature to output the
overheat warning signal.
42: OHF (Fin overheat warning)
Data
00: Enabled during acceleration/
deceleration and constant speed.
01: Enabled only during constant
speed*
0.0 to 2.0 × Rated current
Set a low current signal output level.
43: LOC (Low current signal)
ON
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Default
Unit
setting
°C
100.
− −
Default
Unit
setting
−
01
Rated
A
current
− −