Hitachi SJ700-2 Capacitor life warning signal WAC, Communication line disconnection signal NDc

Related code

C021 to C025: Terminal [11] to [15] functions

C026: Alarm relay terminal function

C077: Communication trip time

Related code

C021 to C025: Terminal [11] to [15] functions

C026: Alarm relay terminal function

Chapter 4 Explanation of Functions

Item	Function code	Data or range of data	Description
		33	LOG1: Logical operation result 1
			(C142, C143, and C144)
Terminal function		34	LOG2: Logical operation result 2
			(C145, C146, and C147)
	C021 to C025	35	LOG3: Logical operation result 3
			(C148, C149, and C150)
	C026	36	LOG4: Logical operation result 4
			(C151, C152, and C153)
Alarm relay
		37	LOG5: Logical operation result 5
terminal function			(C154, C155, and C156)
		38	LOG6: Logical operation result 6
			(C157, C158, and C159)
Logical output	C142/C145/C148/	Selection of "00" to "56" from the	Selection of operation-target 1
		data (except LOG1 to LOG6) output
signal selection 1	C151/C154/C157
		to intelligent output terminals
Logical output	C143/C146/C149/	Selection of "00" to "56" from the	Selection of operation-target 2
		data (except LOG1 to LOG6) output
signal selection 2	C152/C155/C158
		to intelligent output terminals
Logical output	C144/C147/C150/	00	AND
signal operator		01	OR
	C153/C156/C159
selection
		02	XOR

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	Function code	Data or range of data	Description
Terminal function	C021 to C025	39	WAC: Capacitor life warning signal
Alarm relay terminal function	C026		(for on-board capacitors)

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 trip time

Communication line disconnection signal (NDc)

(C077)

Item	Function code	Data or range of data	Description
Terminal function	C021 to C025	32	NDc: Communication line
Alarm relay terminal function	C026		disconnection signal
Communication trip time	C077	0.00 to 99.99 (s)	Setting of the limit time for
			reception timeout

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