Omron SYSMAC CP Series, Руководство пользователя

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15-5
15 Ethernet
CP2E CPU Unit Software User’s Manual(W614)
15-1
System
Con
fig
uratio
n an
d F
eatu
res
15
15-1-2 Exchanging Data betw
ee
n OMR
O
N PLCs using Ether
net
Use the FINS/UDP, and construct applications using the SEND(090), RECV(09 8 ), and CMND(490)
instructions in the ladder program. 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.
Use the FINS/TCP, and construct applications using the SEND(090), RECV(09 8 ), and CMND(490)
instructions in the ladder program. FINS/TCP is supported by many OMRON products and is compati-
ble with earlier OMRON Ethernet Units. It provides automatic recovery at the TCP/IP layer from com-
munications errors (such as packet loss) that occur during multilevel routing.
15-1-2 Exchanging Data between OMRON PLCs using Ethernet
Connecting within the Same Segment
Connecting through Multiple Segments
Intr a net
Prod u ction line A
Ethernet Unit
Ethernet
Ro u ter
FIN S me ssa ge
comm u nic a tion s
Connecting thro u gh m u ltiple s egment s :
U s e FIN S /TCP.
Prod u ction line B
Ro u ter
FIN S me ssa ge
comm u nic a tion s
CP2E-N D -
Connecting within the sa me s egment:
U s e FIN S /UDP.
CP2E-N D -