Rockwell Automation 1771-KA2 Communication Adapter Module - Manual (Page 101)

Station Interfacing
Chapter 8
8-9
Using Two Communication Modules
When you connect two communication modules to your PLC-2 family
processor, forces may or may not be cleared during uploading. Use the
following cross-reference to determine whether forces will be cleared.
Does uploading take place through a later revision
1771–KA2 module (series A, revision D or later)?
yes no
forces are forces are cleared and
terminal shows mode
select menu
forces are cleared and
terminal shows mode
select menu forces are cleared and
terminal shows mode
select menu
yes
no
Does uploading take
place through a
module directly
connected to
a 1770–T3
terminal?
not cleared
This chapter dealt with interfacing and interaction of a 1771-KA2 with its
station and other stations on a Data Highway. This chapter covered:
Floating master format
Mastership of a Data Highway
Command and reply messages, acknowledgements
Message priority
Data Highway link disconnects
Commands from a computer on a Data Highway through a
communication controller module (1771-KE/KF)
Diagnostic command summary
Chapter 9 discusses start-up and troubleshooting, monitoring, and module
replacement.
Chapter Summary