Omron CS1W-ETN21 - Manual (Page 41)

16
Specifications Section 1-4
CJ1W-ETN21
1-4-3 Software Configuration
The software supported by the Ethernet Unit runs in the layers shown in the
following diagram. The components that form the various layers are defined
below the diagram.
1,2,3... 1. Ethernet (Ver. 2.0)
The Version 2.0 Ethernet frame format is used for communications.
2. IP (Internet Protocol)
Transfers datagrams to destination nodes using IP addresses.
3. ICMP (Internet Control Message Protocol)
Supports IP communications by signalling errors in data transfers.
4. ARP (Address Resolution Protocol)
Determines the Ethernet address (i.e., physical address) by broadcasting
based on the target IP address.
65 31
UNIT
No.
ETN21
90
2.7
2.7
100BASE-TX
10BASE-T
NODE
No.
x16
1
x16 0
(Unit: mm)
01
23456789
ABCD EF
01
23456789
ABCD EF
01
23456789
ABCD EF
RUN ERC SD RD
ERH TCP FTP HOST 100M
LNK
CS/CJ-series CPU Unit
FINS/UDP 8. FTP server 9. SMTP
5. UDP 6. TCP
2. IP 3. ICMP 4. ARP
1. Ethernet (Ver. 2.0)
FTP
11. SMTP
Ethernet
Unit
CS/CJ-series
CPU Unit
10. POP3
7. FINS
FINS/TCP
Socket
services
FINS communi-
cation service
Socket
services
E-mail
transmis-
sion E-mail
reception
Memory Card /
EM File Memory