Software Configuration - Omron CJ1W-ETN11 Operation Manual

Software Configuration

1-6

Software Configuration

FINS Communication
Service
Ethernet
IP
ICMP
ARP
UDP
TCP
10
CJ1W-ETN11
31
ETN11
RUN ERC SD RD
ERH TCP FTP TS
UNIT
4
No.
NODE
4
No.
1
x16
4
0
x16
ETHERNET
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.
CS/CJ-series PC's CPU
Socket
Socket
Services
Services
FINS
UDP
IP
Ethernet (V2.0)
The Version-2.0 Ethernet frame format is used for communications.
Internet Protocol: Transfers datagrams to target nodes using IP addresses.
Internet Control Message Protocol: Supports IP communications by signalling
errors in data transfers.
Address Resolution Protocol: Determines the Ethernet address (i.e., physical
address) by broadcasting based on the target IP address.
User Datagram Protocol: Performs datagram communications. Data resends,
priority control, flow control, and other measures to ensure communications
reliability are not performed for UDP communications, i.e., there is no way of
guaranteeing normal communications without programming special measures
to do so into the user's application program.
Transmission Control Protocol: Performs communications after establishing a
connection (i.e., a virtual circuit) with the target node to provide a highly reli-
able communications method.
65
(Unit: mm)
Memory Card/
EM File Memory
Mail
FTP
transmissions
SMTP FTP server
TCP
ICMP ARP
Section 1-6
CS/CJ-series PC's CPU Unit
Ethernet Unit