Exchanging Data Between Omron Plcs Using Ethernet - Omron CP1L-EL20DR-D Operation Manual

System Configuration and Features
Connecting within the
Same Segment
Connecting through
Multiple Segments
Connecting from a
Personal Computer with a
Dynamic Private IP
Address
6-1-2

Exchanging Data between OMRON PLCs using Ethernet

Connecting within the
Same Segment
Connecting through
Multiple Segments
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.
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.
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.
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.
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.
Ethernet
Router
SYSMAC
CP1L
NC
POWER
RUN
ERR/ALM
INH
LNK/ACT
BKUP
1
ANALOG INPUT
V1+ V2+ COM
MAC Address:
01234567890A
Intranet
Production line A
Router
Connecting through multiple segments:
FINS message
communications
Use FINS/TCP.
Production line B
CP1L-EL/EM
COM 01 03 05 07 09 11 01 03 05 07 09 11
00 02 04 06 08 10 00 02 04 06 08 10
2
00 01 02 03 04 06 00 01 03 04 06
COM(V+) COM 05 07 COM 02 COM 05 07
FINS message
communications
Connecting within the same segment:
Use FINS/UDP.
Section 6-1
Ethernet Unit
CP1L-EL/EM
SYSMAC
CP1L
COM 01 03 05 07 09 11 01 03 05 07 09 11
NC 00 02 04 06 08 10 00 02 04 06 08 10
POWER
RUN
ERR/ALM
INH
LNK/ACT
BKUP
1 2
00 01 02 03 04 06 00 01 03 04 06
ANALOG INPUT
COM(V+) COM 05 07 COM 02 COM 05 07
V1+ V2+ COM
MAC Address:
01234567890A
161