Anybus-X Module Description
1-2
© 2005 HMS Industrial Networks
AB7665 User manual
Theory of Operation
The Anybus-X provides centralized data storage, the “PassageWay
TM
”, for data
that is shared between the J1939 and Ethernet networks. Data is placed into the
PassageWay by one network interface, allowing the data to be read through the
other network interface.
The Anybus-X appears as a single device on either network using standard proto-
col mechanisms. No special, or extended, protocol features are required of the
devices on either network to read and write the data flowing through the Passage-
Way; all cross-network activity is transparent to the devices on either network.
Figure 1-1 Anybus-X PassageWay Operation
Ethe
rne
t Ne
twork
J1
93
9 Ne
tw
ork
PassageWay
Input
Table
Output
Table
Receive PGNs
Send PGNs
Read Inputs
Write Outputs
