Omron SYSDRIVE MX2 SERIES - Fin Overheat Warning (OHF); Low Current Signal (LOC)

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5-9 Functions Relating to Protections, Warnings and Various Output Signals
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
5
Functions
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).
Low Current Signal (LOC)
This signal is output when output current falls below the Low Current Detection Level (C039).
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).
* 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).
Parameter
No.
Function name Data
Default
setting
Unit
C064
Cooling Fin
Overheat Warning
Level
0. to 110.
Set a temperature to output the
overheat warning signal.
100. °C
C021 to C022
Multi-function
Output Terminal
Selection
42: OHF (Fin overheat warning) −−
C026
Multi-function
Relay Output
Function Selection
Parameter
No.
Function name Data
Default
setting
Unit
C038
Low Current Signal
Output Mode
Selection
00: Enabled during acceleration/
deceleration and constant speed.
01 −
01: Enabled only during constant
speed*
C039
Low Current Detection
Level
0.0 to 2.0 × Rated current
Set a low current signal output level.
Rated
current
A
C021 to C022
Multi-function Output
Terminal Selection
43: LOC (Low current signal) −−
C026
Multi-function Relay
Output Function
Selection
Output current (A)
Low Current Signal
Detection Level
(C039)
Low current (LOC) output
ON
ON