Rockwell Automation 1779-KP3R DATA HIGHWAY II - Manual (Page 14)

Overview
Chapter 1
1-8
You can also connect a Data Highway Plus subnetwork to your Data
Highway II network via one Allen–Bradley KP5 module. When you have
a Data Highway Plus sub–network attached to your Data Highway II
network, the nodes on Data Highway Plus are considered on–link to the
nodes on Data Highway II.
If you are sending a message instruction from a PLC–3 controller on Data
Highway II to a PLC–5

controller on Data Highway Plus, you would use
the same link number for both (figure 1.10).
Figure 1.10
Example of Using Link Numbers When Addressing
Data Highway Link 0
PLC-3
Link = 0
PLC-5
Link = 0
KP5
Data Highway Plus Sub-link
11000-I
Note that in the this example, the PLC–5 controller considers the KP3
module a remote station and may refer to the KP3 as offlink. The PLC–5
controller cannot communicate to stations on another Data Highway II
link.
Note also that when we speak of KP3 communication on the Data
Highway II network, there are different types: communication initiated by
the KP3 and communication initiated via a computer. Refer to the
following table.
The KP3 has the ability to initiate simple
data transfers to: You can initiate via a computer
(through a KFM or KFL module):
another KP3 uploading and downloading of
processor memory
a KP2 diagnostics
a PLC–5 controller (via a KP5) station management