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have to do some heating control

Created by: Import-User-1 at: 12/16/2014 9:48 AM (8 Replies)

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12/16/2014 9:48 AM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	Import of a Technical Question of the User beckauri beckauri hi, Can you help me? I have to do some heating control for my final project and I don't have any knowladge in this field, I have bulb which warms aluminium desk (there is sensor on it) and other side there is fan (for cooling) and I have to keep the temperature. :( here is pic of my work
Import-User-1 Posts: 3609 Rating: (29)
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12/16/2014 11:59 AM	Rate (0)
William_B Posts: 5225 Rating: (1196)	Hi. The picture might be helpful. May we see it please. w
William_B Posts: 5225 Rating: (1196)
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12/16/2014 12:37 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 11/26/2024 Posts: 6854 Rating: (1365)	Import-User-1 Import of a Technical Question of the User beckauri beckauri hi, Can you help me? I have to do some heating control for my final project and I don't have any knowladge in this field, I have bulb which warms aluminium desk (there is sensor on it) and other side there is fan (for cooling) and I have to keep the temperature. :( here is pic of my work Hello , The system you asking about is known as "temperature system with active heating and active cooling".If you CPU is S7-300/400,you have variety of control functions available in TIA V13(PID professional).But in general, you need a continuous input as PV--->PID Regulator-->LMN from -100 ~100-->Pulse generaor with a suitable Ratio_FAC-->(Q_POS,Q_NEG). For S7-1200,I guess you may have all details you need packed in PID Compact. I hope this helps, Hamid Hosseini
	Last edited by: hdhosseini at: 12/16/2014 12:38 PM Demo Channel on Youtube
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This contribution was helpful to 2 thankful Users IBN-Service William_B

12/16/2014 12:38 PM	Rate (0)
Jens_app Gold Member Joined: 1/5/2011 Last visit: 11/29/2024 Posts: 815 Rating: (123)	Hi, Like William mentioned, the picture would indeed be useful, and please elaborate, your question is very vague. Give us more detail about the equipment(heating, sensor and fan)used, provide us with a datasheet if available. How is your fan/ heating controlled, is it on/off, pulse width modulation,...? How accurate should you regulation be? ... As much information as possible. Kr, Jens
	Keep it simple and on-topic. A simple straight-to-the-point answer is often of more quality than a complicated one.
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This contribution was helpful to 1 thankful Users William_B

12/16/2014 12:43 PM
William_B Posts: 5225 Rating: (1196)	Thank you Mr. Hamid and Jens for your interest. Please rember that this problem might need ON/OFF type control. Or.. it might be that the threat starter might have the choice of upgrading to a light dimmer switch. I will leave this in your capable hands. w
William_B Posts: 5225 Rating: (1196)	Last edited by: William B. at: 12/16/2014 12:45 PM
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12/16/2014 1:17 PM	Rate (1)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 11/26/2024 Posts: 6854 Rating: (1365)	William B. Thank you Mr. Hamid and Jens for your interest. Please rember that this problem might need ON/OFF type control. ... Be sure William B. , (Q_POS,Q_NEG) are outputs of a pulse generator to make pulses(ON/OFF) based on the LMN (-100~100)coming from PID.At least, I read a question twice and consult official references to write each word here .
	Last edited by: Min_Moderator at: 1/15/2015 1:12 PM Hdhosseini requested the deletion of the attachment because of copyright issue. The deleted pictures are from "Controlling With SIMATC" the latest English edition(April 2005) pages 130 and 137. Demo Channel on Youtube
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This contribution was helpful to 2 thankful Users IBN-Service William_B

12/16/2014 2:00 PM
William_B Posts: 5225 Rating: (1196)	hdhosseini Be sure William B. , (Q_POS,Q_NEG) are outputs of a pulse generator to make pulses(ON/OFF) based on the LMN (-100~100)coming from PID.At least, I read a question twice and consult official references to write each word here. Mr. Hamid, You have much knowledge in the field and any contribution you make is golden. For students (like beckauri), a project like this could be overwhelming. To work through all the possible information can be difficult without guidance. Please, Mr Hamid, be so kind as to direct beckauri as to where to start looking for his answers. I hope I speak for beckaur when saying.. Thank you very much for your valued attention. Sincere greetings. w
William_B Posts: 5225 Rating: (1196)
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12/16/2014 2:12 PM
IBN-Service Posts: 8946 Rating: (999)	William B. ... For students (like beckauri), a project like this could be overwhelming. To work through all the possible information can be difficult without guidance. Please, Mr Hamid, be so kind as to direct beckauri as to where to start looking for his answers. ... Dear w. After reading your comment twice, I still think that you are wrong. How do you know, the threadstarter is Student? Why do you think he is "overwhelmed" Just because he has no experience with heating control? If user beckauri needs more Information, he may ask again asking here in Forum, itis free of charge! Hamids answers are high quality and a proof for his many years of experience.
IBN-Service Posts: 8946 Rating: (999)	Last edited by: Min_Moderator at: 12/16/2014 2:15 PM In this way the post is much nicer
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12/16/2014 3:44 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 11/27/2024 Posts: 15441 Rating: (2452)	Import-User-1 Import of a Technical Question of the User beckauri beckauri hi, Can you help me? I have to do some heating control for my final project and I don't have any knowladge in this field, I have bulb which warms aluminium desk (there is sensor on it) and other side there is fan (for cooling) and I have to keep the temperature. :( here is pic of my work http://pix.ge/x/a/m/y8xkm/ If you are suggesting the right answer is to use a PLC, I might suggest otherwise. Where I work, we use a device(manufacturer's companyname is also a compass direction) that seems global since we see various versions of these temperature controllers in equipment from all over the world. It has the ability to use a PID, has learn mode, adjustable setpoints, and in a package the size of a similar to a standard IECcontactor. If you must use a PLC, you can implement your own PID control (google PID so you can learn the needed control theory) or use one built into the PLC. There are a large number of ways to implement the solution, and if you have a PLC and a burning desire, just be sure and look up uses for an SSR in a heating circuit. Since this is supposed to be a learning opportunity, I will simply say, take a look in the FAQs for example projects, at least one of which is probably very close to what you need. If you cannot find the FAQs, google "site:siemens.com Siemens FAQs" and see what you find.
	Last edited by: huggy_d1 at: 12/16/2014 3:50 PM fixed quoting. science guy
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