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Hot!Elevator Algo

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du00000001
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Re: Elevator Algo 2018/08/16 13:13:24 (permalink)
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Motor control plus position sensing is often a separate microcontroller/PCB. Somewhat depends on the motor used as especially EC motors consume a considerable amount of computing power.

PEBKAC / EBKAC / POBCAK / PICNIC (eventually see en.wikipedia.org)
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naeem1234
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Re: Elevator Algo 2018/08/16 13:35:44 (permalink)
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du00000001
Motor control plus position sensing is often a separate microcontroller/PCB. Somewhat depends on the motor used as especially EC motors consume a considerable amount of computing power.




Oh yes, there is an Inverter (VFD) just for the AC Motor control. Thats a separate device. My Controller will generate signals for that Inverter Drive that will eventually run the motor at eeither of the 2 speeds , SLOW or FAST.
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Jim Nickerson
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Re: Elevator Algo 2018/08/16 13:46:34 (permalink)
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How much time have you been given to complete this task ?
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naeem1234
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Re: Elevator Algo 2018/08/16 14:05:36 (permalink)
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JANickerson
How much time have you been given to complete this task ?




Time is not specified at the moment.. but i think it will take approx 3-4 months to reach to a stable working version.
 
BTW can you suggest how much approx. time it would take for a developer like me?
What should be an approximate firmware development cost for this work?
post edited by naeem1234 - 2018/08/16 14:16:32
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katela
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Re: Elevator Algo 2018/08/16 15:08:59 (permalink)
+1 (1)
naeem1234
 
 I would appreciate if you could point me to any professional course or book on this subject for my formal training.


You can also look at these two books to give you some ideas. Not deep, but you can get some few concepts:
Programming a 4 Floor Elevator with SIMATIC S7-300 and LOGO Programmable Logic Controllers (PLC)
 Simple Arduino based 4 Floor Elevator project
 

Free online Microcontroller Tutorials and Projects for Hobbyists and students. From beginners to advanced. Website: www.studentcompanion.co.za
YouTube Tutorials: https://www.youtube.com/StudentCompanionSA
#65
Jim Nickerson
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Re: Elevator Algo 2018/08/17 07:03:26 (permalink)
+2 (2)
naeem1234
Time is not specified at the moment.. but i think it will take approx 3-4 months to reach to a stable working version.
 
BTW can you suggest how much approx. time it would take for a developer like me?

You have not shared your education or programming experience or your work history.
You have not shared the actual scope of work for this project nor what tests the completed project will be subject to when tested to determine if the job is satisfactorily completed.
Therefore I have no idea how long it might take you to complete this task.
Without a detailed scope of work I would quote a job like this by the hour, time and materials.
#66
JorgeF
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Re: Elevator Algo 2018/08/17 11:18:16 (permalink)
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Hi
 
Well, I found half an hour of free time and come out with something that might be called a starting point for a brainstorm on the subject.
Please note that this is my first atempt at the subject, all I have is my plain elevator user experience, so, please, go easy on the criticism.
 
See atachements as the forum doesn't allow me to put inline pictures.
 

Attached Image(s)


Best regards
Jorge
 
I'm here http://picforum.ric323.com too!
And it works better....
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naeem1234
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Re: Elevator Algo 2018/08/17 19:01:30 (permalink)
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JorgeF
Hi
 
Well, I found half an hour of free time and come out with something that might be called a starting point for a brainstorm on the subject.
Please note that this is my first atempt at the subject, all I have is my plain elevator user experience, so, please, go easy on the criticism.
 
See atachements as the forum doesn't allow me to put inline pictures.
 




 
Thanks a lot.. it surely will help in kick-starting the project
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naeem1234
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Re: Elevator Algo 2018/08/18 03:17:53 (permalink)
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JANickerson
naeem1234
Time is not specified at the moment.. but i think it will take approx 3-4 months to reach to a stable working version.
 
BTW can you suggest how much approx. time it would take for a developer like me?

You have not shared your education or programming experience or your work history.
You have not shared the actual scope of work for this project nor what tests the completed project will be subject to when tested to determine if the job is satisfactorily completed.
Therefore I have no idea how long it might take you to complete this task.
Without a detailed scope of work I would quote a job like this by the hour, time and materials.




 
I have just mediocre credentials.. more of a hobbyist.. and constantly learning the things by doing them.
 
Regarding the development cost of a Simple Elevator Controller.. can you give some range by estimating the amount of work and effort it would require?
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Jim Nickerson
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Re: Elevator Algo 2018/08/18 07:04:39 (permalink)
+1 (1)
No scope of work == no quote.
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naeem1234
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Re: Elevator Algo 2018/08/18 07:13:44 (permalink)
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JANickerson
No scope of work == no quote.




Not asking for any quote.. but just an estimated range of cost.
 
Scope of work can be only limited to writing firmware for a simple elevator controller for an existing board, with and without the project source code.
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Jim Nickerson
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Re: Elevator Algo 2018/08/18 07:16:52 (permalink)
+1 (1)
1. Provide a schematic of the existing board.
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naeem1234
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Re: Elevator Algo 2018/08/18 08:13:07 (permalink)
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JANickerson
1. Provide a schematic of the existing board.




You can assume any simplest elevator controller board.
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Jim Nickerson
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Re: Elevator Algo 2018/08/18 08:16:25 (permalink)
+2 (2)
You might as well have asked "how long is a piece of string".
This thread reminds me of a conversation with "Eliza".
bye
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katela
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Re: Elevator Algo 2018/08/18 10:00:22 (permalink)
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naeem1234
JANickerson
1. Provide a schematic of the existing board.




You can assume any simplest elevator controller board.


Are you asking how much other people could quote for this job or how much you should quote?
The cost will obviously depend on many parameters you are not providing: The scope of work, the hourly rate of engineers working on this project, their hourly rate will depend on their education/experience, markup, operational costs, etc.
And remember you did not also specify (I think ) your location, engineers in your area could have provided you with a correct estimation. Remember $1 in USA won't have the same value in every country.
Whatever amount  if that what you are looking for, an engineer quotes let say in South Africa based on all the operation costs might not be applicable to your area without some adjustments.

Free online Microcontroller Tutorials and Projects for Hobbyists and students. From beginners to advanced. Website: www.studentcompanion.co.za
YouTube Tutorials: https://www.youtube.com/StudentCompanionSA
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naeem1234
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Re: Elevator Algo 2018/08/18 10:12:36 (permalink)
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katela
naeem1234
JANickerson
1. Provide a schematic of the existing board.




You can assume any simplest elevator controller board.


Are you asking how much other people could quote for this job or how much you should quote?
The cost will obviously depend on many parameters you are not providing: The scope of work, the hourly rate of engineers working on this project, their hourly rate will depend on their education/experience, markup, operational costs, etc.
And remember you did not also specify (I think ) your location, engineers in your area could have provided you with a correct estimation. Remember $1 in USA won't have the same value in every country.
Whatever amount  if that what you are looking for, an engineer quotes let say in South Africa based on all the operation costs might not be applicable to your area without some adjustments.




Yes I can understand it depends on many factors.. not as simple as I thought.
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PStechPaul
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Re: Elevator Algo 2018/08/18 15:37:12 (permalink)
+2 (2)
If one may assume the project will take 4 months, that would be about 685 hours based on 5 days a week and 8 hours a day. A consulting engineer would probably charge at least $50/hr, so about $34,000.

 
#77
naeem1234
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Re: Elevator Algo 2018/08/19 00:19:55 (permalink)
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PStechPaul
If one may assume the project will take 4 months, that would be about 685 hours based on 5 days a week and 8 hours a day. A consulting engineer would probably charge at least $50/hr, so about $34,000.




 
Thanks .. thats good enough .. i can now do the calculation in the light of this approach.
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JorgeF
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Re: Elevator Algo 2018/08/19 11:25:59 (permalink)
+1 (1)
Hi
naeem1234
JorgeF
Hi
 
Well, I found half an hour of free time and come out with something that might be called a starting point for a brainstorm on the subject.
Please note that this is my first atempt at the subject, all I have is my plain elevator user experience, so, please, go easy on the criticism.

Thanks a lot.. it surely will help in kick-starting the project

Don't fall in the trap of thinking that your code will have only 4 tasks/state machines.
Those depicted in my block diagram are more like top level tasks, each one will, for sure, need to be splitted accross many smaller tasks.

Best regards
Jorge
 
I'm here http://picforum.ric323.com too!
And it works better....
#79
naeem1234
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Re: Elevator Algo 2018/08/20 13:13:28 (permalink)
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JorgeF
Don't fall in the trap of thinking that your code will have only 4 tasks/state machines.
Those depicted in my block diagram are more like top level tasks, each one will, for sure, need to be splitted accross many smaller tasks.




 
Can you suggest a typical forever loop in the main() function for this? 
 
I mean that a typical forever loop inside main() function is just 5-10 lines long.. that would be the most-top level of the entire code. So what could be those few lines in the main() functions.. most probably they would be calls to sub-functions.. so what could be those sub-functions which would be called forever over and over again in the main() loop.
#80
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