Rockwell Automation 1771-KA2 Communication Adapter Module - Manual (Page 106)

Start–up and Troubleshooting
Chapter 9
9-4
Processor troubleshooting is described in the appropriate Assembly and
Installation or User’s Manual for each controller.
After the processor fault is corrected, the module automatically rechecks
its communication with the processor and checks the communication zone
rungs. Should proper communication and programming be detected,
module-to-processor interaction is resumed and the PROC indicator turns
OFF. Should both the PROC and PROG indicators be on at the same
time, turn the mode select switch on the processor to PROGRAM LOAD
(PROG) then back to RUN position to reset module operation.
Programming Terminals
Industrial terminals and program panels are invaluable aids for start-up
and troubleshooting. These devices make available such aids as status
indicators, value display, bit ON/OFF status control, FAULT bit
monitoring, and ERROR CODE display.
For the initial start-up procedures described in this chapter, it is best to
have a least 2 programming terminals available. This allows a sending and
receiving station to be monitored at the same time.
Operation and use of the various programming terminals are described in
other publications. (Please refer to the Programming & Operations
manuals in Table 1.B.) This section briefly reviews the following
functions of the programming terminals that have a special importance in
troubleshooting testing:
SEARCH functions
Status indication
FORCE functions
Each of these tools is used in the procedures of sections titled “Start-up
Procedures” and “Troubleshooting.”
SEARCH Functions
SEARCH functions enable various parts of a program to be quickly
located and displayed. Table 9.A lists these functions on an industrial
terminal.