
Overview of FINS Communications | Section |
7-1 Overview of FINS Communications
7-1-1 Communications On an Ethernet Network
Data is sent and received as UDP packets or UDP packets on an Ethernet network.
PLC
Ethernet Unit
or host computer
UDP packet (FINS command)
Ethernet
UDP packet (FINS response)
Ethernet Unit
PLC
In the FINS communications service, both an IP address for IP (the Internet layer) and a FINS node address for FINS (the application layer) are used for the remote device. Also, 9600 is used as the default setting for the local UDP or TCP port number (i.e., the transport layer) for identifying the application layer, i.e., the FINS communications service. (Another number can be set for the FINS/UDP port from the Setup Tab in the Unit Setup.)
For details on pairing FINS node addresses with IP addresses and UDP/TCP port numbers, refer to the subsection IP Addresses in FINS Communications under SECTION 5 Determining IP Addresses in the Operation Manual Con- struction of Networks.
Application Layer
Transport Layer
Internet Layer
Physical Layer
FINS |
|
| Node Address |
UDP | TCP |
UDP Port No. | TCP Port No. |
IP |
|
| IP Address |
Ethernet |
|
| Ethernet Address |
The FINS communications service is a communications method based on UDP/IP, and it is supported by most OMRON
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