Rockwell Automation 61C516 AutoMax/AutoMate 24VAC/DC Input Module - Manual (Page 20)

5Ć2
indirectly by monitoringthe name with the VARIABLE
MONITOR function in the ReSource Software.
For both DCS 5000/AutoMax systems and AutoMate
systems, verify that the program reading the module is
executing fast enough to catch all of the input changes.
Step 5. Verify that the hardware is workingcorrectly.
Toggle the input device. Verify that the LED associated
with the particular bit is also toggling. If it is not, the input
circuit on the module is malfunctioning.
Verify the hardware functionality by systematically
swappingout modules. If the problem is not corrected
after each swap, replace the original item before swapping
out the next item.
D To test local I/O, first replace the input module. Next,
replace the Processor module (s). If the problem
persists, take all of the modules out of the backplane
except one Processor module and the input module. If
the problem is now corrected, one of the other
modules in the rack is malfunctioning. Reconnect the
other modules one at a time until the problem
reappears. If none of these tests reveals the problem,
replace the backplane.
D To test remote I/O (DCS 5000/AutoMax systems only),
first verify that the remote I/O system is
communicatingwith the drop that contains the input
module beingtested. Next, determine whether the
input module is the only module that is not working. If
more than one module is not workingcorrectly, the
problem most likely lies in the remote I/O system.
To test the remote rack, first replace the input module.
Next, replace the slave remote I/O module. If the
problem persists, take all of the modules out of the
remote backplane except the slave remote I/O module
and the input module. If the problem is now corrected,
one of the other modules in the rack is malfunctioning.
Reconnect the other modules one at a time until the
problem reappears. If the problem proves to be
neither in the remote I/O system nor in the remote
rack, try replacingthe backplane.