Omron CP1L-EL20DR-D, Operation Manual

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System Configuration and Features Section 6-1
Connecting within the
Same Segment Use the UDP/IP version of the FINS communications service (i.e., FINS/
UDP). FINS/UDP is supported by many OMRON products and is compatible
with earlier Ethernet Units (CS1W-ETN21, CJ1W-ETN21 and CP1W-CIF41).
The CX-Programmer can be connected and used with FINS/UDP.
Connecting through
Multiple Segments Use the TCP/IP version of the FINS communications service (i.e., FINS/TCP).
It provides automatic recovery at the TCP/IP layer from communications
errors (such as packet loss) that occur during multilevel routing.
For CX-Programmer, FINS/TCP can be used to directly connect to the PLC
online.
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
FINS/UDP service or use the FINS/TCP 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 cli-
ent.
For CX-Programmer, FINS/TCP can be used to directly connect to the PLC
online.
6-1-2 Exchanging Data between OMRON PLCs using Ethernet
Connecting within the
Same Segment Use the FINS/UDP, and construct applications using the SEND(090),
RECV(098), and CMND(490) instructions in the ladder program. The protocol
processing for FINS/UDP is simpler than for FINS/TCP, giving FINS/UDP cer-
tain 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 FINS/TCP, and construct applications using the SEND(090),
RECV(098), and CMND(490) instructions in the ladder program. FINS/TCP is
supported by many OMRON products (CS1W-ETN21, CJ1W-ETN21 and
CP1W-CIF41). It provides automatic recovery at the TCP/IP layer from com-
munications errors (such as packet loss) that occur during multilevel routing.
MAC Address:
01234567890A
00 NC 02 04 06 08 10 00 02 04 06 08 10
01 COM 03 05 07 09 11 01 03 05 07 09 11
BKUP
ERR/ALM
LNK/ACT
SYSMAC
CP1L
POWER
RUN
INH
1
00 01 02 03 04 06 00 01 03 04 06
COM 02 COM 05 07 COM COM(V+) 05 07
ANALOG INPUT
V1+ V2+ COM
2
MAC Address:
01234567890A
00 NC 02 04 06 08 10 00 02 04 06 08 10
01 COM 03 05 07 09 11 01 03 05 07 09 11
BKUP
ERR/ALM
LNK/ACT
SYSMAC
CP1L
POWER
RUN
INH
1
00 01 02 03 04 06 00 01 03 04 06
COM 02 COM 05 07 COM COM(V+) 05 07
ANALOG INPUT
V1+ V2+ COM
2
Intranet
Production line A
Ethernet Unit
Ethernet
Router
FINS message
communications
Connecting through multiple segments:
Use FINS/TCP.
Production line B
Router
FINS message
communications
CP1L-EL/EM
Connecting within the same segment:
Use FINS/UDP.
CP1L-EL/EM