Omron CJ1W-DRM21, CS1W-DRM21 operation manual Message Communications Specifications, Sages

Overview							Section 6-1
			Note A specific FINS command (command 2801) is used to send explicit mes-
				sages.
Item				Sending			Receiving
Network commu-		CMND(490) using FINS command code 2801 Hex					Automatically responds to explicit messages
nications instruc-		can be used to send explicit messages to					from other devices.
tion		DeviceNet devices. (See note.)
Remote devices		Masters/slaves made by other manufacturers. Sup-					Masters made by other manufacturers.
and supported		ported services determine supported functions.					PCs with CS/CJ-series DeviceNet Units.
functions		PCs with CS/CJ-series DeviceNet Units mounted.
							PCs with C200H-series DeviceNet Master Units.
		Remote CPU Unit status read/write and I/O memory
							PCs with CVM1/CV-series DeviceNet Master
		read/write functions supported.
							Units.
		PCs with C200H I/O Link Units mounted. Remote
							All listed devices support status read/write and I/
		CPU Unit I/O memory read/write function sup-
							O memory read/write for the local CPU Unit.
		ported.
				Note A specific FINS command (command 2801) is used to send explicit
					messages.
			Note This CS/CJ-series DeviceNet Unit (CS1W-DRM21 or CJ1W-DRM21) contains
				a PLC Object so that the I/O memory of the CPU Unit of the DeviceNet Unit
				can be read/written from other devices. The C200HW-DRT21 I/O Link Unit
				also contains a PLC Object so that the I/O memory of the CPU Unit of the I/O
				Link Unit can be read/written from other devices. The C200HW-DRM21-V1
				and CVM1-DRM21-V1 DeviceNet Master Units, however, do not have PLC
				Objects, the I/O memory of the CPU Unit for these Units cannot be read or
				written from other devices.
6-1-4	Message Communications Specifications
		Item					Specification
Applicable PC					CS/CJ-series
Unit model number					CS1W-DRM21/CJ1W-DRM21
Max. No. of communica-				FINS mes-	62 (node address 0 cannot be used for FINS communications)
tions nodes per Unit				sages
				Explicit mes-	63
				sages
Communications instruc-				Sending/	SEND and RECV instructions
tions				receiving
				data
				FINS com-	CMND(490) instruction
				mands
					There are FINS commands addressed to the PC and others addressed to
					the CS/CJ-series DeviceNet Unit.
					Note: FINS commands can be sent to PCs with CS/CJ-series DeviceNet
					Units mounted to them. FINS commands cannot be sent to PCs with
					C200HW-DRM21-V1 or CVM1-DRM21-V1 DeviceNet Master Units
					mounted to them.
				Explicit	CMND(490) instruction
				DeviceNet
					Sends explicit messages to masters/slaves made by other manufacturers,
				messages
					PCs with C200H I/O Link Units, or PCs with CS/CJ-series DeviceNet Units
					mounted to them.
Sources:destinations					1:1 (Broadcasting is not supported)
Data length (excluding command code)					SEND:	267 words max.
					RECV:	269 words max.
					CMND	542 bytes max.
No. of simultaneous instructions					One each for 8 ports (ports 0 to 7)
					Refer to the section on CMND(490) in the CS/CJ Series Programmable
					Controllers Instructions Reference Manual (W340) for information on ports
					(logical ports).

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