Features - Omron CP1E CPU UNIT SOFTWARE User Manual

Connecting from a Personal Computer with a Dynamic Private IP Address
Depending on whether or not the connection will be within the same segment, either use an IP
address conversion method for dynamic IP addresses in the UDP/IP version of the FINS communi-
cations service or use the TCP/IP version of the FINS communications service.
It is possible to connect online to a PLC using the CX-Programmer from a computer serving as a
temporarily connected node or a permanent DHCP client.
For CX-Programmer, FINS/TCP can be used to directly connect to the PLC online.
Receiving Data from OMRON PLCs using Ethernet
The CP1W-CIF41 Ethernet Option Board can only support receiving FINS commands from OMRON
PLCs using Ethernet.
Note The SEND(090), RECV(098) and CMND(490) instructions cannot be used in the CP1E CPU Unit .
Connecting within the Same Segment
Use the UDP/IP version of the FINS communications service (i.e., FINS/UDP), and construct appli-
cations using the SEND(090), RECV(098), and CMND(490) instructions in the ladder program.
FINS/UDP is supported by many OMRON products, and is compatible with earlier Ethernet Units
(CS1W-ETN01/ETN11/ETN21 and CJ1W-ETN11/ETN21). The protocol processing for FINS/UDP is
simpler than for FINS/TCP, giving FINS/UDP certain advantages in terms of performance. Another
feature of FINS/UDP is that it can be used for broadcasting.
On the other hand, with FINS/UDP it is necessary to provide measures, such as retries, for handling
communications errors.
Connecting through Multiple Segments
Use the TCP/IP version of the FINS communications service (i.e., FINS/TCP), and construct appli-
cations using the SEND(090), RECV(098), and CMND(490) instructions in the ladder program.
FINS/TCP is the initial function supported by this Ethernet Option Board (CP1W-CIF41). It provides
automatic recovery at the TCP/IP layer from communications errors (such as packet loss) that occur
during multilevel routing.

17-1-2 Features

Compatibility and Speed
The transmission medium of Ethernet side has been upgraded to 100Base-TX, while compatibility with
some functions and application interfaces of the existing Ethernet Unit models for CS/CJ series has
been maintained.
Limited by the Host Link protocol used on the serial side, the processing speed is only 115.2kbps,
slower than the existing Ethernet Unit. The FINS frame length is less than 540 bytes, so the system
response performance for the same FINS message applications is longer than the existing Ethernet
Unit.
CP1E CPU Unit Software User's Manual(W480)
17 Ethernet Option Board
17
17-3