Omron CQM1H-SCB41 operation manual 128

Board Replacement						Section 9-2
	Error	Indicator	Error details	Cause		Remedy
	code
	2 Hex	No display	Sequence	The	Correct the communications sequence
			number error	communications	number.
				sequence number	Use CX-Protocol to register the
				specified in bits 00
					specified communications sequence
				to 11 of the
					number.
				PMCR(––)
				instruction’s C
				operand is not
				registered.
	3 Hex	ERR/ALM	Receive data	The data range of	For operand specification:
		: Flashing	write range	the specified area	Check the PMCR(––) instruction S and
			overflow error	is exceeded when	D operand specifications.
				data is being	For direct specification of link words:
				written to or read
					Use CX-Protocol to check the specified
				from the I/O
					range.
				memory of the
				CPU Unit.
	4 Hex	ERR/	Protocol data	There is a code	Check the following items and correct
		ALM:	syntax error	that cannot be	the problem.
		Flashing		executed during	•	Check whether the total specified
				protocol execution.
						number of link words in the area (O1,
						O2, I1, I2) exceeds 128.
					•	The same area with link word
						specification is used by both ports 1
						and 2.
					•	A write instruction with constant
						specification is specified.
					•	An EM Area read/write instruction is
						specified as an interrupt notification.
					•	There are more than 30 write
						attributes set for one message.
					•	The length of a send/receive message
						is set to 0 bytes.
					•	The length of a send/receive message
						is longer than 127 bytes.
					•	No messages are registered for matrix
						reception.
					•	Both RTS/CTS flow control and
						Xon/Xoff flow control are set for the
						same transmission line.
	5 Hex	ERR/	Protocol macro	The PMCR	Check if the PMCR instruction was
		ALM:	execution error	instruction was	executed during any one of the following
		Flashing	during port	executed while the	processes.
			initialization	port was being	•	While the serial communications port
				initialized.
						was being restarted.
					•	While the serial communications mode
						in the PC system setup of the Serial
						Communications Board was being
						modified using the STUP instruction.
					•	While the serial communications mode
						in the PC system setup of the Serial
						Communications Board was being
						modified using the Programming
						Device.

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