Omron SYSMAC CS1W-ETN21 Operation Manual page 34

Features
Improved FINS Message Communications
Transferring Data Files between Host Computers (FTP Server Function)
Additional E-mail Functions
Mail Receive Function
(Receiving Commands for
the PLC by E-mail)
E-mail File Attachment
Function
Starting with unit version 1.5, the performance of sending and receiving has
been improved using optional settings for the TCP or UDP socket services
using specific bits in memory. Also, a linger socket option has been added to
the TCP socket services. Specifying this option enables open processing
immediately with the same port number without having to wait (approximately
1 min.) until the port number opens after the socket closes.
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.
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.
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.
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.
This function can be linked to the CS/CJ File Memory function.
Section 1-2
9