HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 2/2
GlennA
User Rank
Gold
Re: alarm or fault memory
GlennA   6/4/2012 9:46:44 AM
NO RATINGS
TJ McDermott;  Yes, too many alarm messages can also be a problem.  The ABB IRB 6400 S4c controller had several message lists, and a general list.  And some alarms would generate a secondary message, or even a tertiary message;  e.g. on a servo fault, each of the 6 axes would reply with a shutdown message.  It took some time to sort through the alarms to get to the primary error.

TJ McDermott
User Rank
Blogger
Re: alarm or fault memory
TJ McDermott   6/4/2012 9:40:24 AM
NO RATINGS
Alarm history is vital when there is more than a handful of alarms to track.  On the other hand, having a hundred alarms to sort through can be just as difficult as the intermittent one.

naperlou
User Rank
Blogger
Re: alarm or fault memory
naperlou   6/4/2012 9:34:17 AM
NO RATINGS
GlennA, I was working for a company that made simulators at one time.  I was involved in a R&D project to track errors and predict faults.  It was very interesting and an early application of AI in a real-time system.  We acutally logged every fault, even intermittent ones.  I learned about this working on satellites, actually.  Having an indicator that just blinked is not really useful, you need to keep that information.

GlennA
User Rank
Gold
alarm or fault memory
GlennA   6/4/2012 9:00:55 AM
NO RATINGS
Intermittent or momentary faults can be very hard to find.  On some machines, where possible, I added a latch to the alarm.  Other times, you just had to watch for the error.  One of the machines that I worked on had an air blow for spindle cleaning during tool change.  If the air pressure dropped below the switch setting the machine Emergency-Stopped on low air.  As soon as it stopped and shut off the air blow, the pressure built back up above the switch setting, and the error automatically reset .  Machine operators were notorious for not paying attention, so the complaint was usually "the machine just stopped".  Often the fix was just replacing the air supply hose with a shorter, larger diameter hose.

<<  <  Page 2/2


Partner Zone
Latest Analysis
Engineers at Fuel Cell Energy have found a way to take advantage of a side reaction, unique to their carbonate fuel cell that has nothing to do with energy production, as a potential, cost-effective solution to capturing carbon from fossil fuel power plants.
To get to a trillion sensors in the IoT that we all look forward to, there are many challenges to commercialization that still remain, including interoperability, the lack of standards, and the issue of security, to name a few.
Researchers in The Netherlands are testing highway sound barriers that have a two-fold purpose: to block sound and also to harvest solar energy.
This is part one of an article discussing the University of Washington’s nationally ranked FSAE electric car (eCar) and combustible car (cCar). Stay tuned for part two, tomorrow, which will discuss the four unique PCBs used in both the eCar and cCars.
Today, no matter where in the world the device is located, it can call home and ask for the latest-and-greatest firmware with bug fixes and feature updates.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 6 - 10, Building Raspberry Pi Controllers with Python
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service