On Wed May 3 16:01:16 2000 Johnson,Alex wrote...
>
>Stan,
>
>
>Re: Options
>Are you dead set against Micro I/A for AB integration?
No, we are not oposed to this solutin, but I for one am totaly
unfamiliar with it. Does it integrate well into a sytesm based up 51
serries AP/QP/AW's, with the orignal I?A I/O structure, and AB PLC5's?
>
>It has Ethernet support, it's faster than a CP30 (almost a 40), it has the
>full block set, it costs less, ...
>
>
>Frankly, I can't see a reason to use a DI30 unless you need fault-tolerant
>electronics.
There is a desire for that, although myself I don't think it is
imprtant based upon:
1. There is still only a single PLC (as in no PLC edundancy).
2. The Fooxboro hardware has a long history of reliabilty in our mill.
>
>Re: AW-I
>
>Yes, the AW-I if not running would cut you off from the PLCs. However, it is
>suitable for a number of uses.
I would find this troubling. At presnt I can reboot (or shutdown for
backup) any AP/WP/AW on any node and, as long as I don't have any other
abnormal occurences, it is transparent to controling the process.
If I had a Sun workstation that was a critical part of the
communications path to my PLC's I could not do this. This is
unfortunate, because this should be a huge preformance win over any
other solution.
I think taht a system using to Sun's could be designed to provied
redundant commuctioan paths to/from the PLC. IMHO tyhis would be the
ideal solution. I will admit it would be a bit costly, but I think I
could justify the cost for teh preformance, and reliability.
--
Stan Brown [EMAIL PROTECTED] 843-745-3154
Charleston SC.
--
Windows 98: n.
useless extension to a minor patch release for 32-bit extensions and
a graphical shell for a 16-bit patch to an 8-bit operating system
originally coded for a 4-bit microprocessor, written by a 2-bit
company that can't stand for 1 bit of competition.
-
(c) 2000 Stan Brown. Redistribution via the Microsoft Network is prohibited.
-----------------------------------------------------------------------
This list is neither sponsored nor endorsed by the Foxboro Company. All
postings from this list are the work of list subscribers and no warranty
is made or implied as to the accuracy of any information disseminated
through this medium. By subscribing to this list you agree to hold the
list sponsor(s) blameless for any and all mishaps which might occur due to
your application of information received from this mailing list.
To be removed from this list, send mail to
[EMAIL PROTECTED]
with "unsubscribe foxboro" in the Subject. Or, send any mail to
[EMAIL PROTECTED]
