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We recommend this configuration to optimize overall system performance
by minimizing the number of nodes on each of the DH+ subnetworks.
This configuration also optimizes overall system performance by isolating
local traffic to the individual DH+ subnetworks. The DH protocol is used
on the broadband backbone.
See the 1785-KA DH/DH+ Communication Adapter Module manual
(publication 1785-6.5.1) for more details on this application. The manual
contains examples of DH baseband applications that are valid for
corresponding DH on broadband applications using the KRF.
Remote I/O Broadband Link Configuration
In this application, the KRF and standard remote I/O modules create a
single remote I/O link that resides directly on the broadband. The block
transfer read and write scanning of remote I/O is sent over the broadband.
Figures 2.4, 2.5, and 2.6 show possible remote I/O broadband link
configurations for PLC-5, PLC-3, and PLC-2 programmable controllers.
Table 2.C on page 2-9 tells you what scanner or adapter you need to
configure the network in each example.
Figure 2.4
Remote I/O on broadband link using the PLC 5 Programmable Controller
PLC 5
baseband cable
KRF
Translator
KRF
1771 ASB
Chapter 2
Guidelines for Connecting the 1771 KRF
remote I/O on
broadband
KRF
KRF
1771 ASB
1771 ASB
KRF
1771 ASB
17883
2 7
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