Omron CQM1H-SCB41 operation manual 123

Board Replacement					Section 9-2
Serial com-	Indicator	Status	I/O memory	Cause	Remedy
munications	status	information,
mode		etc.
Serial commu-	The COMMj	There is a	The error code in	The communica-	Review the PC Setup, the
nications mode	indicators are	transmission	IR 20100 to	tions conditions	host’s settings, and pro-
is set to Host	flashing, but	error.	IR 20103 for port 1	and baud rate do	gram (such as commands
Link. (Contin-	the response		or IR 20108 to	not match the set-	and frame format) based
ued)	has not been		IR 20111 for port 2	tings at the host.	on the response and the
	returned to the		is 1 (parity error), 2		error code.
	host.		(framing error), or 3
				There is noise in-	Use shielded twisted-pair
			(overrun error).
				terference.	cables.
					Lay power lines separate-
					ly using ducts.
					Review the installation
					environment to reduce
					noise interference.
	The COMMj	There is no	IR 20100 to	A command was	Review the host’s settings
	indicators are	transmission	IR 20103 or	sent from the host	and program (such as pa-
	flashing, and	error.	IR 20108 to	with incorrect pa-	rameter settings) based
	an error re-		IR 20111 are	rameters.	on the response contents.
	sponse has re-		0 Hex.
	turned to the
		There is a	The error code in	The communica-	Review the PC Setup, the
	host.
		transmission	IR 20100 to	tions conditions	host’s settings and pro-
		error.	IR 20103 for port 1	and baud rate do	gram (such as commands
			or IR 20108 to	not match the set-	and frame format) based
			IR 20111 for port 2	tings at the host.	on the response, and the
			is 1 (parity error), 2		error code in IR 20100 to
			(framing error), or 3		IR 20103 or IR 20108 to
			(overrun error).		IR 20111.
	The COMMj	There is an	The error code in	The baud rate is	Review the PC Setup.
	indicators are	intermittent	IR 20100 to	outside the allow-	Review the host’s settings
	flashing, but	transmission	IR 20103 for port 1	able range, and the
					and program (such as
	sometimes	error.	or IR 20108 to	stop bits do not
					baud rate and frame for-
	there is no re-		IR 20111 for port 2	match, causing the
					mat).
	sponse re-		is 1 (parity error), 2	bits to be out of
	turned.		(framing error), or 3	alignment.
			(overrun error).
			Terminating resist-	Cables are incor-	Check the wiring.
			ance switch	rectly connected.
			(TERM) status	The RS-422A/485	Turn ON the terminating
				port 2-wire/4-wire
					resistance of the Serial
				terminating resist-
					Communications Board
				ance setting is in-
					and the last node by us-
				correct.
					ing the terminating resist-
				Adapters such as	ance switch. Turn OFF
				the NT-AL001-E	the terminating resistance
				are incorrectly	of other nodes.
				wired or the termi-
				nating resistance is
				incorrectly set.
			The error code in	Transmission er-	Use shielded twisted-pair
			IR 20100 to	rors are occurring	cables.
			IR 20103 for port 1	that are caused by	Lay power lines separate-
			or IR 20108 to	noise interference.
					ly using ducts.
			IR 20111 for port 2
					Review the installation
			is not 0.
					environment to reduce
					noise interference.

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