For the sparks who think 2 way lighting is complex

[jeepmadmike]

welcome to my world, and we all love pictures

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• jeepmadmike
• 17 Dec 2009
• 1

This is a PLC which has suffered from continous modifications (not by me) i used to be able to fit the trunking lids a few years ago!

under the spagetti there are relays terminals etc etc

and the drawings are not accurate anymore either.....

 

[Spark123]

Allen Bradley SLC 500.
That, by any standard, is a disgrace!

 

[jeepmadmike]

it is horrible when the place breaks down you cause more faults trying to fix one..... i do delight in ringing the man responsible for must of the carnage(at odd times of day) and asking for the diagrams...

his responce, its hardly modified the drawing are current

 

[Spark123]

Why has it been modded to that extent, the whole idea of a PLC is changes can be made via the software.
Unless of course new IO is required.

 

[martinxxxxxx]

In any case standard is to wire from the IO cards down to terminals, so that any chnges to IO allocation can be done at the terminals.

Out of interest, What process is this controlling, it is one heck of a lot of IO?

Martin

 

[jeepmadmike]

the plant control has been extensively modified so additional I/O was required, theres another rack in the same state in the next panel, i priced to replace the enclosure etc when the I/O had to be increased. but didnt get the job!

 

[Spark123]

That's a tiddler! Some of the PLCs I'm used to fill a room.
None of them in a mess like that though.

 

[jeepmadmike]

That's a lot of I/O then! This one has a few remote I/O stations too.
It's only on a batching plant so it isn't massively complex it's just a mess

just out of intrest what industry do you work in

 

[Spark123]

Mainly chemical/treatment plants

 

[conny]

That is just sheer ridiculous and lazy!
Whoever did it should be shot.

Imagine opening your leccy cupboard and finding something akin to that!
Strewth!

 

[ericmark]

Glad we used ASii only 8 in/outs per unit and so easy to add another until 32 limit reached.

Our presses were always being altered but batching plant stayed reasonable static.

 

[crystal ball]

I see quite a lot of this, to be fair to the guy(s) working on these systems quite often the add ons are done a) in a hurry b) on a tight budget usually both

One place I go the owner often wants a machine to perform new functions now as he has an order to fill, so out comes the box of used relays.

 

[mikhailfaradayski]

lol, the only thing missing from that cabinet is a few empty plastic coffee cups and a thick layer of dust.

Have had many happy days looking at stuff like that, with no drawings, missing idents, irate production directors constantly asking when it'll be working (a lot faster if you just f'd off and stopped asking stupid questions, matey!)

heres how i like panels to looks, ooohhh, shiny

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• mikhailfaradayski
• 18 Dec 2009
• 1

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• mikhailfaradayski
• 18 Dec 2009
• 1

 

[Steve]

Mainly chemical/treatment plants

Come on, jazz it up a little why dont you!!!

 

[ricicle]

Here's a little one I wired a few years ago.......

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• ricicle
• 18 Dec 2009
• 1