Omron CS1W-ETN21 - Manual (Page 52)

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Comparison with Previous Models Section 1-7
1-7 Comparison with Previous Models
Item Previous models New models
Model number CS1W-ETN11
CJ1W-ETN11 CS1W-ETN21
CJ1W-ETN21
Physical layer 10Base-T 100Base-TX, 10Base-T
Number of nodes 126 254
PLC maintenance via the Internet Not possible to send FINS
commands from a personal
computer to the PLC via the
Internet. Can send commands (including FINS com-
mands) by e-mail over the Internet from a
personal computer to the PLC (using the
mail receive function).
Server specification Specification by IP address
only Specification by IP address or by host name
(using the DNS client function)
Communi-
cations ser-
vice FINS com-
munica-
tions
service Automatic IP
address acquisi-
tion (DHCP cli-
ent) by personal
computer Not possible for a computer
automatically acquiring IP
addresses to send commands
to the PLC and receive
responses. A computer automatically acquiring IP
addresses can send commands to the PLC
and receive responses.
(UDP/IP: By automatic generation
(dynamic) IP address conversion method;
TCP/IP: Automatic)
FINS communi-
cations with per-
sonal computers
without fixed
node addresses Not possible Possible (with Automatic allocation by
Ethernet Unit)
(Client FINS automatic node address allo-
cation function, TCP/IP only)
Handling TCP/
IP With FINS communications,
only UDP/IP possible. With FINS communications, both UDP/IP
and TCP/IP possible.
Simultaneous
connection of
multiple applica-
tions in a per-
sonal computer Not possible Possible (with both UDP/IP and TCP/IP)
Mail functions Mail send function only E-mail attachments with I/O memory data
are now possible for the mail send function.
(SMTP client function, file attachment func-
tion)
With the mail receive function, commands
can be received from the PLC. (POP3 client
function, mail receive function)
FTP server function Same
Socket services function --- The following features have been added to
the TCP socket services function:
• Use of keep-alive
• Number of bytes of data received for TCP
socket Nos. 1 to 8
• Status of TCP socket Nos. 1 to 8: Data
Received Flag
Automatic clock information
adjustment Not possible CPU Unit built-in clock can be adjusted from
SNTP server. (SNTP client function)