Omron CJ1W-ETN21 Ethernet Unit Communications Services, Functions Listed by Purpose

Ethernet Unit Communications ServicesSection 1-1

1-1	Ethernet Unit Communications Services
	Service			Main functions	Counterpart device	Reference
Mail send function		Through intranet or		Used to e-mail specified I/O memory	Computer	SECTION 2 Mail
		internet		data or a file (up to 1 MB) from the	(E-mail software)	Send Function
				PLC to the computer automatically
				when a preset condition is met.
Mail receive func-				Used to perform operations in the PLC	Computer	SECTION 3
tion				from the computer, such as reading or	(E-mail software)	Receive Mail
				writing I/O memory data, backing up		Function
				data, changing the operating mode, or
				transferring files (up to 1 MB).
FTP server func-		Through intranet or		Used to transfer large files between	Computer	SECTION 4
tion		internet (See note.)		the computer and PLC.	(FTP client software)	FTP Server
Socket service				Used to transfer data between gen-	Computer	SECTION 6
function				eral-purpose applications and the	(General applica-	Socket Services
				PLC.	tions that do not use
					FINS communica-
					tions)
Automatic clock		Through intranet		Used to automatically adjust the PLC's	SNTP Server	SECTION 5
adjust function				internal clock.		Automatic Clock
						Adjustment
						Function
FINS communica-		Through intranet or		Used to access the PLC from a com-	Computer	SECTION 7
tions		internet (See note.)		puter (FINS application) or send mes-	(User-created FINS	Using FINS
				sage communications from one PLC	communications	Communica-
				to another.	application)	tions to Create
				Note The PLC can be accessed with		Host Applica-
						tions
				FINS message communications
				even from a DHCP client com-
				puter or computer with an
				unspecified FINS node address.
		Note	When transferring data through the internet, a global IP address must be
			acquired for the Ethernet Unit.

1-2	Functions Listed by Purpose
Timing and		User purpose	Communications	Method	Restrictions
direction			service
User-specified tim-		Reading and writing	Mail Receive	IOMRead (I/O memory read) and	The maximum data
ing, sent from com-		data in the CPU Unit's	Function	IOMWrite (I/O memory write) com-	size is 6,000
puter		I/O memory		mands	words.
		Changing the CPU		ChangeMode command	---
		Unit's operating mode
		Performing operations		FileWrite, FileRead, FileDelete,	The maximum data
		on EM file memory or		and FileList commands	size is 1 MB.
		a Memory Card
		installed in the CPU
		Unit
		Backing up the user		UMBackup (User program backup)	---
		program or parameter		and PARAMBackup (Parameter
		area in the CPU Unit		area backup) commands
		Reading or clearing		ErrorLogRead and ErrorLogClear	---
		the error log in the		commands
		Ethernet Unit or CPU
		Unit
		Sending a specific		FinsSend command	---
		FINS command to a
		specific Unit

2