Omron CS1W-ETN21 Automatic Clock Adjustment Function, Specifying Servers by Host Name

Overview of Communications Functions Section 1-5

1-5-6 Automatic Clock Adjustment Function

The Ethernet Unit can acquire clock information from the SNTP server at a particular time or when a dedicated bit turns ON, and it can refresh the inter- nal clock information of the CPU Unit to which it is mounted.

SNTP server

Ethernet

Clock information

Ethernet Unit

CS/CJ-series

CPU Unit

Note (1) An SNTP server is required to use this function.

(2)SNTP 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.

(4)When using the Internet, depending on the condition of the network it may not be possible to acquire the clock information.

1-5-7 Specifying Servers by Host Name

POP servers, SMTP servers, and SNTP servers can be specified by host name rather than by IP address by using of the DNS client function.

DNS server

IP address

Ethernet

	Host name	Ethernet Unit
CS/CJ-series
CPU Unit

Note A DNS server is required to specify servers by host name.

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