Rockwell Automation D17846.2.4 CONTROLNET KT EMULA - Manual (Page 10)

Puiblication 1784-6.2.4 - September 1997
1-2 Overview of the KTCX Card Environment
Figure 1.1
ControlNet Network Overview
Node Addressing and Node Table
The KTCX does not maintain an active node table. However, to
accommodate existing applications the KTCX emulates an active
node table. All nodes will appear to be active when the KTCX is
online whether they are active or not. This is to allow old applications
to communicate with the KTCX card. The operating states described
in the emulated node table are defined as follows:
Host PC with
ISA/EISA Bus Interface KTCX Card
ControlNet Network
ControlNet Tap
ControlNet Tap
ControlNet Tap
ControlNet Tap
1794 ACN
Flex I/O Adapters
1771 ACN
I/O Adapters
PLC-5C Processors
ControlNet Taps: 1786-TPR
1786-TPYR
1786-TPS
1786-TPYS
Card Network State Node Table Entry Status
Reset 0xFF’s
Off-line 0xFF’s
Lonely The node’s entry is its address. Everything else
reads 0xFF.
Listen-only The node’s entry is its address. Everything else
reads 0xFF.
On-line All entries are initialized to the next node
address. For example, 0x02 points to node
0x03. Node 0x03 points to node 0x04. Node
0x04 points to node 0x05 and so on.