Omron MX2 Series - Cooling Fan Life Warning Signal (WAF); Communication Disconnection Detection Signal (Ndc)

7 Other Functions
7 - 88
Multi-function Compact Inverter 3G3MX2-EV2 User’s Manual (I666-E1)
3. When b092 is 01, the cooling fan operates during inverter operation. If the cooling fin temperature
exceeds 60°C, the cooling fan starts operating even when inverter operation is stopped. If the cooling fin
temperature falls below 50°C when inverter operation is stopped, the cooling fan stops after 3 minutes.
4. When b092 is 02, the cooling fan will operate if the Inverter’s cooling fin temperature exceeds approxi-
mately 40°C. If the cooling fin temperature remains at or below 40°C for 3 minutes, the cooling fan will
stop.
7-8-14 Cooling Fan Life Warning Signal (WAF)
In the Ambient Temperature (b075), set the ambient temperature in the operating environment of the
inverter.
This warning is made on the assumption that the life expectancy of the cooling fan is approximately 10
years under an ambient temperature of 40°C or lower.
If this signal is output, it is recommended to check the cooling fan for clogging etc.
The status of this signal can be monitored in the Life Assessment Monitor (d022).
Parameter
No.
Function name
Data
Default
data
Unit
b075
Ambient Temperature
−10 to 50
Set the ambient temperature in
the operating environment.
40
°C
C021, C022
Multi-function Output 11/12 Selection
40: WAF (Cooling fan life warn-
ing signal)
−
−
C026
Multi-function Relay Output (AL1, AL2)
Function Selection
Related functions
b092, d022
7-8-15 Communication Disconnection Detection Signal (NDc)
This signal is enabled only when Modbus communication is selected for RS-485 communications.
If a reception timeout error occurs, this signal will be output until the next data is received.
Set the time until the reception timeout in the Communication Error Timeout Time (C077).
For details, refer to Section 8 Communications Functions.
External controller
Inverter
Monitor timer
Communications
error (NDc) output
Communication
Error Timeout Time
(C077)
Parameter
No.
Function name
Data
Default
data
Unit
C077
Communication Error Timeout Time
0.00: Timeout disabled
0.01 to 99.99
Set the reception timeout time.
0.00
s
C021, C022
Multi-function Output 11/12 Selection
32: NDc (Communications
disconnection detection)
−
−
C026
Multi-function Relay Output (AL1, AL2)
Function Selection
7
7-8 Functions Related to Protection, Warning, and Various Output Signals
7-8-14 Cooling Fan Life Warning Signal (WAF)