Omron FQM1-CM001, FQM1-MMA21, FQM1-MMP21 operation manual Serial CommunicationsSection

Serial CommunicationsSection 6-1

6-1	Serial Communications
						The FQM1 supports the following serial communications functions.
Protocol				Connections			Description		Ports
								Peripheral	RS-	RS-
									232C	422A
Host Link		Host computer or					Various control commands,	OK	OK	Not al-
		OMRON PT (Programmable Terminal)					such as reading and writing			lowed
					OMRON PT		I/O memory, changing the
							operating mode, and force-
		Host computer			(Programmable
					Terminal)		setting/resetting bits, can be
							executed by sending Host
			or			Monitor and
						set parameters	Link (C-mode) commands or
							FINS commands from the
							host computer to the Coordi-
							nator Module.

Use Host Link communica- tions to monitor data, such as status trace data, or to send data, such as operating con- ditions information, to the FQM1.

No-protocol	General-purpose	Communicate with general-	Not	OK	Not al-
		purpose devices connected	allowed		lowed
	external device
		to the RS-232C port without
		a command–response for-
		mat. The TXD(236) and
		RXD(235) instructions are
		executed from the program to
		transmit data from the send
		port or read data at the
		receive port. The frame
		headers and end codes can
		be specified.
1:N NT Link	OMRON PT	Data can be exchanged with	OK	OK	Not al-
(The 1:N NT	(Programmable Terminal)	PTs without using a commu-			lowed
Link commu-		nications program in the
nications are		Coordinator Module.
used even
for 1:1 con-
nections.)

Serial PLC			For NS-	Up to ten words per Module	Not	OK	Not al-
Link Slave	CJ1M CPU Unit		series PT:	can be shared with up to	allowed		lowed
	Master		NS-AL002	eight Coordinator Modules
	CJ1W-CIF11	RS-422A/485		as slaves using a CJM1 CPU
	connected to			Unit as the maser.
	RS-232C port
	(See note.)			An RS-422A Converter can
				be connected to the RS-
	FQM1	FQM1		232C port on each Coordina-
		8 Units max.		tor Module to communicate
				via RS-422A/485, or one
		CJ1M CPU Unit		Coordinator Module can
		Master		communicate via an RS-
	RS-232C			232C connection to the
				CJ1M master.
		FQM1		The Serial PLC Links can
				also include PTs as slaves
				via NT Links (1:N) combined
				with Coordinator Modules.

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