Omron CQM1H-SCB41 operation manual 126

Board Replacement					Section 9-2
Serial	Indicator	Status	I/O memory	Cause	Remedy
commu-	display	information,
nications		etc.
mode
Serial com-	The	The PMCR(––)	The error code in	The protocol data in the	Use CX-Protocol to cor-
munica-	COMMj	instruction is	IR 20408 to	Serial Communications	rect and transfer the pro-
tions mode	indicators	executed, but	IR 20411 or	Board is incorrect.	tocol data.
is set to	do not	IR 20708 or IR	IR 20412 to
protocol	flash at all.	20712 (Protocol	IR 20415 is 4 Hex
macro.	(Commu-	Macro Execut-	(Protocol Data Syn-
	nications	ing Flag) does	tax Error).
	have not	not turn ON.
	been elec-
		IR 20708 or	Send processing is	The send wait time spe-	Use CX-Protocol to
	trically es-
		IR 20712 (Pro-	not executed.	cified in communications	check whether the send
	tablished.)
		tocol Macro Ex-		sequence step units is	wait time is correctly set.
		ecuting Flag)		too long.
		turns ON when
		the PMCR(––)
		instruction is
		executed, but
		data cannot be
		sent or received
		properly.
Serial com-		IR 20708 or	IR 20711 or	Forced Abort Bit is force-	Release the Forced
munica-		IR 20712 (Pro-	IR 20715 (Forced	set.	Abort Bit
tions mode		tocol Macro Ex-	Abort Bit) are ON.
is set to		ecuting Flag)
protocol		momentarily
macro.		turns ON when
		the PMCR(––)
		instruction is
		executed, but it
		does not re-
		main ON.
		IR 20708 or	The sequence is	Protocol macro data is	Use CX-Protocol trans-
		IR 20712 (Pro-	running and does	not set correctly.	mission line trace to
		tocol Macro Ex-	not end (the words	The PC Setup settings	check whether the proto-
		ecuting Flag)	allocated in the CIO		col data and PC Setup
				such as the baud rate
		remains ON	Area is in receive		settings are correct.
				and frame format differ
		when the	status).
				from those of the remote
		PMCR(––)
				node.
		instruction is
		executed with-
		out setting the
		monitoring time
		for individual
		sequences
		Send data has	The contents of the	The baud rate is outside	Review the PC Setup
		already been	words allocated in	the allowable range, or	settings.
		transmitted, but	settings in the PC	there are bit errors due	Review the remote node
		there is no re-	Setup do not match	to mismatched stop bits
					settings and the program
		sponse from	those of the remote	and so on.
					(including the baud rate,
		the remote	node.
					frame format, and so
		node.
					on).
			The error code in	The wiring is faulty.	Check the wiring.
			IR 20100 to	The setting of the	Turn ON the terminating
			IR 20103 for port 1
				2/4-wire switch for the	resistances of the Serial
			or IR 20108 to
				RS-422A/485 port does	Communications Board
			IR 20111 for port 2
				not match the actual wir-	and the last node. Turn
			is not 0.
				ing (WIRE).	OFF the terminating re-
				Wiring of adapters (e.g.,	sistances of other
					nodes.
				NT-AL001-E) is faulty.
			---	Hardware failure.	Replace the Serial Com-
					munications Board.

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