Omron CS1W-ETN21 Transferring Files, Sending Mail, Receiving Mail, Automatic Clock Adjustment

Private and Global Addresses		Section 5-3
		• With FINS/UDP, when the IP address (private address) of a computer
		serving as a DHCP client is changed, the Ethernet Unit's IP address con-
		version method will be the automatic generation method (dynamic), the
		combined method, or the IP address table method. When FINS/TCP is
		used, IP addresses can be changed automatically.
	2.	Transferring Files
		• Files can be transferred, using FTP protocol, between the PLC and a
		device such as a personal computer (i.e., an FTP client) with a private
		address on the intranet.
		• The TCP port number to be used for FTP cannot be used if prohibited by
		a firewall in the communications path.
	3.	Sending Mail
		The PLC can send the Ethernet Unit's IP address to the SMTP server by
		mail via the intranet.
	4.	Receiving Mail
		The PLC can receive the Ethernet Unit's IP address from the POP3 server
		by mail via the intranet.
	5.	Automatic Clock Adjustment
		The PLC can acquire clock data through the Ethernet Unit's IP address
		from the SNTP server via the intranet.
	6.	Host Name Designation
		The PLC can acquire the server IP address for the Ethernet Unit's IP ad-
		dress from the DNS server via the intranet.
Note	Network Security and Firewalls
	Setting up an intranet through a global address involves network security con-
	siderations. Before doing so, be sure to consult with a network specialist and

consider installing a firewall.

Once a firewall has been set up by a communications company, on the other hand, there may be some applications that cannot be used. Be sure to check first with the communications company.

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