Allen Bradley PLC's Known Issues List

greenspun.com : LUSENET : TimeBomb 2000 (Y2000) : One Thread

First, if this list has been posted before, I apologize profusely. Sorry.

Second, I have a question, does the fact that this is a list of "known issues" imply that there is also a list of "unknown issues"?

Third, how does one post a "hotlink" to stuff like this? --

http://domino.automation.rockwell.com/webstuff/y2k.nsf/

-- pho (owennos@bigfoot.com), November 18, 1999

Answers

Sorry again, didn't post complete address

Try this link:

http://domino.automation.rockwell.com/webstuff/y2k.nsf/41c6476f97c5c7d d862566b900517d3b/27453b70e1e1f59c8625673e00697752

-- pho (owennos@bigfoot.com), November 18, 1999.


The easiest way that I've found to post a hotlink in a message is like this:

- When you're typing your message, go to View -- Page Source (Netscape, it may be different in Explorer) - Toward the top of the new page that opens, you'll see a thing that reads:

(a href="index.tcl")LUSENET(/a) -- except it'll be "carrots" instead of parentheses

- Copy that, close that page source window, paste into your message - Replace the index.tcl part, INSIDE of the quotes, with your link - Replace the LUSENET part with the title you wish to give the link.

It will then look like this:

Allen Bradley PLC's Known Issues List

-- (a@helping.hand), November 18, 1999.


OK, Rockwell, won't let you browse their server.

Then start here at a dealer in Australia:

http://www.autocon.com.au/

Then work your way into Allen-Bradley stuff.

One More Time

-- pho (owennos@bigfoot.com), November 18, 1999.


Thanks "a", I'll figure it out at some point.

Anyway, Here's what I was hoping someone can explain -- the following issue (#2) has a statement that implies the following PLC models can cause a process that relies on the date to shutdown if not powered up during the leap year change on February 29. Am I reading this correctly? Caps and quotes below are mine for emphasis::

Issue #2

1785-LT4 1785-LT3 1785-LT 1785-LT2 6008-LTV

The processors pass all the tests except leap year in powered down mode. The processor, if set to 2/28/2000 and powered down through the date change, will power up with 3/1/2000. If the power remains ON through the date change, the correct leap day is displayed. This is not unique to the Year 2000. Expanded tests shows the same results for 1988, 1992, and 1996. The important thing to remember is that this does not stop the processor from running "UNLESS" the application code relies on the date for execution. There will be no fix for these processors.

-- pho (owennos@bigfoot.com), November 18, 1999.


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