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Chapter 4
Item
Function code
Terminal function
Alarm relay
terminal function
Logical output
C142/C145/C148/
signal selection 1
C151/C154/C157
Logical output
C143/C146/C149/
signal selection 2
C152/C155/C158
Logical output
C144/C147/C150/
signal operator
C153/C156/C159
selection
4.2.67 Capacitor life warning signal (WAC)
The inverter checks the operating life of the capacitors on the internal
circuit boards on the basis of the internal temperature and cumulative
power-on time.
You can monitor the state of the capacitor life warning (WAC) signal by using the life-check monitoring function (d022).
If the WAC signal is output, you are recommended to replace the main circuit and logic circuit boards.
Item
Terminal function
Alarm relay terminal function
4.2.68 Communication line disconnection signal (NDc)
This signal function is enabled only when ModBus-RTU has been
selected for the RS485 communication.
If a reception timeout occurs, the inverter continues to output the
communication line disconnection signal until it receives the next data.
Specify the limit time for reception timeout by setting the communication trip time (C077).
For details, see Section 4.4, "Communication Functions."
External control equipment
Inverter
Monitoring timer
Communication line disconnection
signal (NDc)
Item
Terminal function
Alarm relay terminal function
Communication trip time
C021 to C025
C026
Selection of "00" to "56" from the data
(except LOG1 to LOG6) output to
intelligent output terminals
Selection of "00" to "56" from the data
(except LOG1 to LOG6) output to
intelligent output terminals
Function code
C021 to C025
C026
Function code
C021 to C025
C026
C077
Data or range of data
33
34
35
36
37
38
00
01
02
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function
Data or range of data
39
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function
C077: Communication trip time
Communication trip time
(C077)
Data or range of data
32
0.00 to 99.99 (s)
4-67
Explanation of Functions
Description
LOG1: Logical operation result 1
(C142, C143, and C144)
LOG2: Logical operation result 2
(C145, C146, and C147)
LOG3: Logical operation result 3
(C148, C149, and C150)
LOG4: Logical operation result 4
(C151, C152, and C153)
LOG5: Logical operation result 5
(C154, C155, and C156)
LOG6: Logical operation result 6
(C157, C158, and C159)
Selection of operation-target 1
Selection of operation-target 2
AND
OR
XOR
Related code
Description
WAC: Capacitor life warning signal
(for on-board capacitors)
Related code
Description
NDc: Communication line
disconnection signal
Setting of the limit time for
reception timeout
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