Coasters Safty Brakes

Dave, I take it you know the fun little HAL and IBM word play?

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Is that a Q-bot in your pocket or are you just happy to see me?

jimmybob said:
'gator, was it you that said "Be polite and ignore the idiots"?
RideMan opens up the case on the HAL CoasterComputer 2000 (which was created using spare parts from an old Translatatron 3000) :
I *did* say that jimmybob, but I've evolved since then...some might say for the better, others might be a bit more...perceptive...;)
On the other thing...I *hope* that wasn't the Translatatron that I broke when March Madness hit home...I thought that one had been repaired....;)
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Acronymphomania (n): the socially unacceptable love of heights, and acronyms
Thanks for the memories #23...there is NO "next Jordan"

Yes, GP. And I must admit, HAL is a better name for a computer than Zookd. :)

--Dave Althoff, Jr.
Favorite OS: Doors 2003: "Because you really want to go somewhere today."

i know what i'm talkin about and arent confused. no i wasnt makin fun of rideman. i was talkin about the goof who started this. rideman knows what hes talkin about i never said he did. and i cant explain things because that is confidential information that i can not give out on websites. there was a contract signed about it.

Well, technically if there were any computer error, wouldn't the brakes automatically close..? I believe if I am not wrong that that is the default position, so that there is no risk of collision of trains.. (although I still don't understand SFDL ;) )

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Shaun Rajewski
CoasterLine
http://www.coasterline.com

'gator,

Yes, it was the old T3000, but it died for good after trying to translate posts littered with horrible grammar, u's and ur's and such, and after attempting to sort out some of D3/\/'s famous "r0x0rs w00T!!!111one" posts ;). The ol' girl's circuits just couldn't take any more :)

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Jeff's Stalker
Spring has arrived in Ohio...the Orange Barrels are blooming

Every mechanical device on a roller coaster is desinged to be failsafe. That means that the normal position for all block / reduction brakes are closed. All motors are normaly off unless a signal is sent. On top of that, there are several triggers that will cause the ride to shut down. Latter logic used on some roller coasters basicly mirrors every input and output. Any arguments between the two will prevent anything from happening and will shut down the ride untill it's fixed.

There is much more time and energy spent dealing with safety than the actually ride design. The safety systems are so redundant that it's virtually impossible for an accidemt.

Parks spend a lot of time and money with mantaince and repairs to prevent any mechanical failular.

yes, very good steel and rctycoon, good to see some replies that arent nonsense. which means i dont have to bash em.

Wow, the irony is so thick there that you could slice it with a blow torch.

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- John

my replies arent nonsense. most of the replies here are just plain stupid. thats when i make fun of them. i dont really care about ur opinion of me. u all can think i'm stupid cuz i dont wanna follow the cap and abb. rule. i know the truth that im most likely more intellegent than alot of people writing on this site. dont try to bash on my spelling, its pointless, i'm not gonna change it no matter how much u all bother me

You're sure going to go far in life with that attitude. Be sure to tell your employer that you're not going to change the way you do things just because he wants you too.

People pay to be on this site (myself included) and don't want to have to muddle through **** posts like yours to get to the semi-coherent stuff. By being stubborn and chosing not to improve your communication skills you are being extremely selfish by imposing your sloppiness on others. You're 20 years old, act like it.

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- John

arockam2 said:
most of the replies here are just plain stupid. thats when i make fun of them. i dont really care about ur opinion of me. u all can think i'm stupid cuz i dont wanna follow the cap and abb. rule. i know the truth that im most likely more intellegent than alot of people writing on this site. dont try to bash on my spelling, its pointless, i'm not gonna change it no matter how much u all bother me

(jimmybob activates the Captain Obvious signal)

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Jeff's Stalker
Spring has arrived in Ohio...the Orange Barrels are blooming

The example that Rideman used is classic for the theory that sensors are a more likely cause for failure than either hard wired or PLC systems.

It's always a question of what is the correct position of failing safe and how many safeties are necessary for the desired level of reliablity.

As for which is easier to alter, I would say hard wired since it is easier for someone relatively untrained to understand. However, in either case it is probably easier to deliberately mess things up by methods other than changing the logic.

Rideman is correct that all outputs from a PLC more powerful that a panel light or a screen indication are made by relays. For brakes, the relay sends power to a solenoid valve, which sends air to the brake cylinder. In the case of motors the relay feeds a bigger relay in the motor starter that controls the power to the motor, though in the case of variable speed drives it can be all electronic.

i have an employer. they dont make stupid rules like this site has. i follow rules if they arent stupid, u get the point? and jimmybob, if it were soo obvious, y do these people complain to me when i bash them for saying the stupid comment? i am acting my age, ur judging by what i say on here by how i act in life. i do this to stupid people. if this site didnt have anal rules like that, and have people with GOOD questions or rumors then maybe i wouldnt have to be like this. a bunch of this is bull crap and i have the right to type what and how i want on here and nobody can stop me.

Buh bye! If you don't like the stupid(?) rules this site has, by all means leave. Take it up with Jeff buddy. No I take that back; don't bother him with your nonsense, its more fun in here. ;)

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If at first don't succeed, find out if the loser gets anything.

no no, if jeff has a problem with me, HE can contact ME. cuz if we have a problem we have to contact him. he can do things the way he wants us to do it. kinda like how i dont agree with his spelling rule, he doesnt agree with typing to me. as i said, jeff email me if theres a problem.

Since this thread has gone down the toilet anyway...

I'm reminded of another Simpsons episode (Treehouse III if I'm not mistaken)...with a few minor modifications...

Abrockam Simpson: "That TOS is evil, I tells ya, EVIL, EEEEEEEEVIIILLLLL"

Marge: "Oh, you say that about everything!"

AS: "I just want attention. :( "

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Jeff's Stalker
Spring has arrived in Ohio...the Orange Barrels are blooming

You keep claiming that you're "so knowledgable" and "so much more intelligent than anyone on this board" but I guess I have yet to see that. It's not a spelling or usage issue, either. Even if I look past that, I haven't seen one useful or intelligent piece of knowledge you've contributed since you showed up. Honestly, did you only come here to power trip yourself by posting things like "Lol! Ur all so stupid, im more intelligent than most ppl on hre"? Because that's all you've been posting. If you think you can really "act your age" and contribute answers to "good questions", then let's see you do it. Because all I've seen so far is a bunch of whining.

-Nate

A further note on PLCs. One of their major advantages is that they can have much more complex logic than relay systems without becoming unmaintainable. For example, PLCs can often catch faulty sensors if programmed carefully.

For example, a PLC can be programmed to not just assume where a train is by the sensors, but to also do the logical operation of shutting things down if a train is not detected. If the station sensor fails a PLC can be programmed to determine that a train is now missing, so a sensor must have failed and it's time to shut the ride down. A PLC can also check to make sure that each sensor cycles on each train run. This kind of logic just requires to many mechanical relays to be practical.

i dont have to prove anything to u all. ur all obsessed with coasters and need to get a life. i have one, and know who i am. u can all go **** urselves and see if i care. its a website, what are U trying to prove? do we have to prove ourselves to people who dont know us? NO, just think about that.