Omron CS1W-ETN21 - Manual (Page 34)

9
Features Section 1-2
Improved FINS Message Communications
The following functions have been improved over previous Ethernet Unit mod-
els. They allow the scale of the system to be increased, and can give greater
flexibility to the system configuration including the host computer.
• Expanded number of nodes (to 254 max., from 126 max.)
• Communications are now enabled even if the host computer's IP address
is dynamic. (DHCP client computers can be handled, including TCP/IP
and UDP/IP.)
→
Previously IP addresses for host computers could be fixed only.
→
For Ethernet Units with Unit Ver. 1.3 or later, the Unit can be protected
against access from nodes with dynamically changed IP addresses (set
to be fixed only).
• An automatic client FINS node address allocation function now makes it
possible to connect online to the PLC even if no FINS node address has
been set for the host computer.
→
Previously online connection to the PLC was possible only after a FINS
node address was set for the host computer.
• FINS message communications are now enabled in TCP/IP (with up to 16
simultaneous connections), so a system can now utilize FINS message
communications in both UDP/IP and TCP/IP.
→
Previously only UDP/IP could be used.
• Multiple FINS applications (such as the CX-Programmer) on the same
computer can now be connected online to the PLC via Ethernet (in either
TCP/IP or UDP/IP).
→
Previously when one FINS application on a computer was connected
online to the PLC, it was impossible to connect any other at the same
time.
Transferring Data Files between Host Computers (FTP Server Function)
A built-in FTP server function enables data files in the PLC to be read from a
workstation or computer with an FTP client function, and for data to be written
to the PLC. Large amounts of data can be transferred at a time from clients,
without requiring ladder programming.
Additional E-mail Functions
With previous Ethernet Unit models (CS1W-ETN01/CS1W-ETN11/CJ1W-
ETN11), e-mail could sent only from the Ethernet Unit, and the data that could
be sent was limited to user-created ASCII text data and system data. Now the
following e-mail functions have been added.
Mail Receive Function
(Receiving Commands for
the PLC by E-mail) Commands for the PLC (mail remote commands) can be written into e-mail,
and the Ethernet Unit can receive them, execute them, and send responses
by e-mail.
E-mail File Attachment
Function This function can be linked to the CS/CJ File Memory function.
• The Ethernet Unit can automatically generate data files (6,000 words
maximum per file) from the CPU Unit's I/O memory status, and send them
to specified e-mail addresses as e-mail attachments. It can also send pro-
gram files from the Memory Card (up to 1 MB) to specified e-mail
addresses as e-mail attachments.