[TCUG] Re: old controller replacements
- From: "Richard" <richardwberry@xxxxxxxxxxxxxxx>
- To: <tcug@xxxxxxxxxxxxx>
- Date: Fri, 1 Oct 2004 16:24:40 +0100
I think as an industry we are going to have to get used to shorter life
expectancy as key components are going to go out of circulation more
quickly. In many respects this is not necessarily an aspect the signal
controller manufacturers can control - once chip demand drops globally =
the
suppliers will cull the product from their catalogue.
So if the budget is to be controlled then maybe it is best to look at =
life
cycle costing and build in a replacement in year 12 or 15.=20
Lastly I think it is very easy to get into a false sense of security by
looking at fault records - as Bruce has experienced a reliable 70 /25 =
can
suddenly do some very strange things before expiring completely leaving =
you
chasing around in hurry to get things up and running - better to do
replacements in a controlled programme.
Richard Berry
Tel 01623 883790
Mob 07870 397069
All email and attachements are checked using Norton 2004. If you =
experience
any difficulty please contact me
-----Original Message-----
From: tcug-bounce@xxxxxxxxxxxxx [mailto:tcug-bounce@xxxxxxxxxxxxx] On =
Behalf
Of Bull Peter
Sent: 01 October 2004 10:53
To: 'tcug@xxxxxxxxxxxxx'
Subject: [TCUG] Re: old controller replacements
I agree with Howard, if you have the luxury of funding to support a
replacement programme it needs to be based on a combination of age and
reliability. I think 15 years is too soon for a reliable controller in =
good
condition, but 25+ years is pushing it even if the controller is =
reliable.
Components age at different rates and even the highest spec ones will =
expire
eventually. At least 70s and 25s don't have EPROMs, which definitely =
have a
limited life, albeit you can probably reburn them if you can find an
appropriate burner. If you are reluctant to lose your old cases we have =
had
some success grit blasting and recoating old 25 cases to use as
miscellaneous equipment cabinets.
Peter Bull
-----Original Message-----
From: Saffer Howard [mailto:Howard.Saffer@xxxxxxxxxxxxxxxx]
Sent: 01 October 2004 10:09
To: 'tcug@xxxxxxxxxxxxx'
Subject: [TCUG] Re: old controller replacements
Wouldn't controller replacement criteria based on age and current
'reliability' be a better indicator for replacement policies?. We all =
know
that some types of older controller are very reliable - and unless there =
is
some other requirement for replacing the controller (e.g. changing the =
site
geometry or upgrading facilities on site - or spares availability) - why
replace reliable equipment?
(This is assuming there is funding for a controller replacement =
programme
anyway! - especially as in many cases, if it is time to replace the
controller, it is often also time to replace the rest of the street
equipment too!)
Howard Saffer
-----Original Message-----
From: Peter Jones [mailto:peter.jones@xxxxxxxxxxxxxxxxxxxxxxx]
Sent: 30 September 2004 12:59
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] Re: old controller replacements
I'm with you Graeme.=20
Nothing worse than having to replace a good old T200 that's worked
reliably for 15 years or more with something that may not begin with a
letter 'S'!
Peter
Peter Jones
Project Leader - Traffic Control Systems
Phone: +44 (0) 151 934 4254
Fax: +44 (0) 151 922 4514
Mobile: 07788 100 584
Peter.Jones (AT) technical.sefton.gov.uk
Sefton MBC - UTC
7th Floor
Balliol House
Balliol Road
Bootle
L20 3NJ
Please see our web pages on traffic control in Sefton:
http://www.sefton.gov.uk/content-2781
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