Troubleshooting Allen Bradley PLC with RSLogix Emulate 500


Troubleshooting
Allen Bradley PLC with RSLogix Emulate 500

Here
are a few of the most common problems people have with RSLogix Emulate, and how
to get around them.
Q. When I
run a project in RSLogix Emulate, my system seems to slow down
drastically.  What’s wrong?
Answer: The software
runs your ladder logic projects as fast as it can.  Sometimes, that means that the software will
“take over” your computer’s CPU. 
You can stop this from happening changing the Priority setting in the
Emulation Settings dialog.
Q. Timers
are not updating.
Answer: You may need
to increase the priority of the running program.  Change the Priority setting in the Emulation
Settings dialog.
Q. The
screen does not refresh fast enough.
Answer: You may need
to increase the priority of the running program.  Change the Priority setting in the Emulation
Settings dialog.
Q. Why do I
keep getting a “watchdog timer” fault?  There isn’t that much ladder logic in my
project.
Answer: Because the
software isn’t the only program being run on your computer, the emulator runs projects
slower than a programmable controller will run them.  You can adjust the watchdog timer setting in
the Fault Options dialog.
Q. RSLogix
Emulate doesn’t seem to perform exactly like my PLC-5 or SLC 500
processor. 
Answer: The software
does not perform all of the functions of a PLC-5 or SLC 500 processor.  Check the Emulator exceptions list.  If you are seeing behavior that can’t be
explained from that list, please contact Rockwell Software Technical Support.
Q. What’s
wrong with all my I/O instructions?
Answer: The software
doesn’t know about I/O.  Most
instructions having to do with I/O operations are not executed.  Check the Emulator exceptions list.  For a more detailed description about how the
software works, see the What RSLogix Emulate does topic.
Q. Why can’t
I see emulated projects in RSLinx or WINtelligent LINX?
Answer: Make sure
you have configured a communications driver for the RSLogix Emulate product you
are using.  See the Communications setup
topic for more information.
Source : Rockwell Software Inc.

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