5
Ethernet Unit Function Guide Section 1-1
Reference SECTION 6 FINS Communications
Monitoring PLC Changes and Sending Equipment Status to the Operator by E-mail
Operation When the mail send function is used, automatic communications applicati ons
via the Internet can be constructed relati vely easily. With this Ethernet Unit,
the following mail triggers can be set as PLC changes. When these setti ngs
can be used, no special ladder program is required for sending e-ma il.
• When a par ticular bit (the Mail Send Switch) turns ON
• When values change in particular words (=, <>, <, <=, >=, >)
• When a par ticular bit changes (either OFF to ON or ON to OFF)
• When a chan ge occurs at the Ethernet Unit (stored in error log)
• When a chang e occurs at the CPU Unit (e.g., a non-fatal error, a fatal
error, or a mode change)
• At regular i ntervals
The following data can be sent by e-mail:
• Text (user-created text strings (ASCII data), Ethern et Unit error log data,
and status data)
• Attached fil es (IOM dat a created automatic ally by the Ether net Unit, data
tables, and files in File Memory)
To use the mail send function, there must be a separate SMTP server on the
network. When using the SMTP server of an Inter ne t Ser vice Provider ( ISP),
security measures, such as POP before or SMTP, may be required. (This Unit
handles POP before SMTP.) In addition to the IP address, the host name used
for the DNS service can be specified for the SMTP/POP3 ser ver.
Intranet
Production line A
Ethernet Unit
Ethernet Router
FINS message
communications Connecting through multiple segments:
Use FINS/TCP.
Production line B
Router
Ethernet Unit
Mail
communications Ethernet Unit
FINS message
communications Memory Card
PLC
Connecting within the same segment:
Use FINS/UDP.
PLC