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Overview of Communications Functions Section 1-5
(2) An SMTP server is required to use the mail send function.
(3) Mail server settings require specialized knowledge, so they should al-
ways be handled by the network administrator.
(4) Be sure that you have a clear understanding of the mail system before us-
ing this function.
(5) Mail my not always be delivered. Depending on factors such as the con-
dition of the network, mail that has been sent may not arrive at its desti-
nation.
1-5-5 Mail Receive Function
With the mail receive function, the user writes a command into the e-mail and
then sends the e-mail to the Ethernet Unit. The Ethernet Unit receives e-mail
at regular intervals, executes the commands, and sends back responses by e-
mail.
E-mail can be received over the Internet, and not just from within the intranet.
The following types of commands can be sent to the PLC: I/O memory read
and write, backup, operating mode changes, and file transfers (of 1 Mbyte or
less).
Note (1) A POP3 server is required to use the mail receive function.
(2) Mail server settings require specialized knowledge, so they should al-
ways be handled by the network administrator.
(3) Be sure that you have a clear understanding of the mail system before us-
ing this function.
(4) Mail may not always be delivered. Depending on factors such as the con-
dition of the network, mail that has been sent may not arrive at its desti-
nation.
Ethernet
Ethernet Unit
POP3 server
E-mail
CS/CJ-series
CPU Unit
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