Hitachi NJI-350B manual Error Codes

Chapter 12 Error Code List and Special Internal Outputs

Chapter 12 Error Code List and Special Internal Outputs

12.1 Error Codes

The table below indicates the self-diagnostic error codes. (See Chapter 13, “Troubleshooting” about corrective actions.) Error codes are output as hexadecimal values to the special internal output WRF000. (This special internal output is saved during power failure, and is retained even when the causes of the error are eliminated. Also, when multiple errors occur, the most fatal error in the error classification is stored.)

Note: LED examples The occurrence of a flashing pattern other than the following means a micro computer error. However, an error code is not reflected in the special internal output in this case.

: ON	: OFF	: Flashing (1 s ON, 1 s OFF)			: Flashing (500 ms ON, 500 ms OFF)		: Flashing (250 ms ON, 250 ms OFF)
Error	Error name		Classifi			RUN	OK	Ope-	Related special
					Description				internal output
code	[detection timing]		-cation			LED	LED	ration
									Bit	Word
11	System ROM error		Fatal	The system ROM has a checksum				Stop		
	[at power ON]		error	error or cannot be read
				Error in built-in ROM/FLASH )
12	System RAM error		Fatal	The system RAM cannot be read				Stop		
	[at power ON]		error	and/or written properly
13	Micro computer error		Fatal	Address error interrupt, undefined				Stop	R7C8	
	[always checking]		error	instruction interrupt occurred in the
				micro computer
	Reset processing in			CPU is being reset.				Stop		
	progress
	[at power ON]
1F	System program error		Fatal	System program in FLASH memory				Stop		
	[always checking]		error	has a checksum error
23	Undefined instruction		Serious	Error is detected when an attempt is				Stop	R7C9	
	[at starting RUN]		error	made to execute a user program
				instruction that cannot be decoded
				(undefined instruction)
27	Data memory error		Serious	Data memory cannot be read/written				Stop		
	[at power ON and		error	properly.
	initializing CPU]
31	User memory error		Serious	A checksum error is detected in user				Stop	R7CA	
	[at power ON and during		error	memory.
	RUN]
33	User memory size error		Serious	User program capacity set by the				Stop	R7CC	
	[at starting RUN]		error	parameter is other than 280 HEX.
34	Grammar/assemble error		Serious	There is a grammatical error in user				Stop	R7D4	WRF001
	[at starting RUN and		error	program.
	online change in RUN]
41	I/O configuration error		Minor	• I/O assignment information and		*1		Stop	R7CD	WRF002
	[always checking]		error	actual loading of module do not				*2
				match
				• Assignment is made for expansion
				level 5 or greater.
				• There exists assignment of 5 slots or
				greater.
44	Overload error		Minor	Execution time for normal scan		*1		Stop	R7D1	
	(normal scan)		error	exceeded the overload check time set				*2
	[at END processing]			by the parameter.
45	Overload error		Minor	Execution time for periodical scan		*1		Stop	R7D2	
	(periodical scan)		error	exceeded the execution period.				*2
	[periodical processing]
46	Overload error		Minor	An interrupt of the same cause		*1		Stop	R7D3	
	(interrupt scan)		error	occurred during interrupt scan				*2
	[during interrupt
	processing]

12-1