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Controlling a ceramic oven

Created by: AutoGen_4030457 at: 10/9/2024 6:29 PM (25 Replies)

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10/9/2024 6:29 PM	Rate (0)
AutoGen_4030457 Posts: 13 Rating: (0)	Hello, I'm struggling to get a program working to control a ceramic oven temperature. - LOGO! 12/24v rce with analog and digital inputs - Thermocouple sensor which outputs 0-10v (0-1200 C) - Start button - Stop button - Selector switch 0 - 1 - 2 Now i would like the logo to operate a relay based on current temperature. The oven has to heat up slowly in set steps in different fases. fase 1: temp rising 60 C per hour start fase 2 when temp 200 C is reached. fase 2: temp rising 100 C per hour start fase 3 when temp 600 C is reached fase 3: temp rising 150 C per hour turn off oven when temp 1000 C is reached. it is very important that the temperature rises slowly, this should be achieved by turning the relay on and off. i hope this is enough info, if anything else is needed please let me know. Thanks in advance.
AutoGen_4030457 Posts: 13 Rating: (0)	Last edited by: U_51046b6f-37e0-4329-b416-93861ba11506 at: 10/09/2024 20:40:29
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10/9/2024 6:52 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/14/2025 Posts: 35958 Rating: (4501)	What is the purpose of the selector switch 0-1-2? You wrote you have a 24 RCE LOGO!. This LOGO! has no analog inputs. Have also a expansions module AM2?
	Last edited by: ixo65 at: 10/09/2024 18:55:49
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10/9/2024 8:39 PM	Rate (0)
AutoGen_4030457 Posts: 13 Rating: (0)	Hi thanks for the quick response, technically i could change the 3-way switch for a 2-way switch, the reason for the switch is that there Will be Two versions of the program in it with different Temperature needs. On the Front of my logo it says it has 0-10v inputs i1,i2,i7,i8 The logo is 12/24rce, i dont know of Maybe that is different than 24rce
AutoGen_4030457 Posts: 13 Rating: (0)
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10/10/2024 12:37 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/14/2025 Posts: 35958 Rating: (4501)	It's a great difference between a 12/24 RCE and a 24 RCE. Not all LOGO!s have analog inputs. Analog inputs have the 12/24 RCE and the 24 CE. No analog inputs have the 24 RCE and the 230 RCE. Take a look at this Siemens web page and learn the difference between the LOGO! base modules.. LOGO! Logic Module - Siemens Global

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10/10/2024 3:58 AM	Rate (0)
qwazee Platinum Member Joined: 3/30/2020 Last visit: 9/12/2025 Posts: 5446 Rating: (1064)	U_51046b6f-37e0-4329-b416-93861ba11506 I'm struggling to get a program working to control a ceramic oven temperature. So you have made a program already? That is good. May we see it please.
	Activities of this user is voluntary. There is no obligation or liability placed on this user. Though optional, your 'please' and 'thank you' is highly valued.
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10/10/2024 5:31 AM	Rate (0)
AutoGen_4030457 Posts: 13 Rating: (0)	Well, what is have now is that when i press the start button it starts the pi controller but i dont know how to go further from Here, i know i have to do something with timers but cant figure out how to let it switch the relais on and off every now and then to regulate a slow increase of temperature.
AutoGen_4030457 Posts: 13 Rating: (0)
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10/10/2024 5:53 AM	Rate (0)
qwazee Platinum Member Joined: 3/30/2020 Last visit: 9/12/2025 Posts: 5446 Rating: (1064)	U_51046b6f-37e0-4329-b416-93861ba11506 Well, what is have now is that when i press the start button it starts the pi controller but i dont know how to go further from Here, i know i have to do something with timers but cant figure out how to let it switch the relais on and off every now and then to regulate a slow increase of temperature. My opinion: It is unfair to wanting volunteers to design a program for you for free. (Yes we are users like you, helping for free.) Please do some effort and make something that can be used as a base for discussion. It will be an advantage to you in the long run. Or contract some professional to do the work for you.
	Activities of this user is voluntary. There is no obligation or liability placed on this user. Though optional, your 'please' and 'thank you' is highly valued.
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10/10/2024 6:01 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/14/2025 Posts: 35958 Rating: (4501)	U_51046b6f-37e0-4329-b416-93861ba11506 Well, what is have now is that when i press the start button it starts the pi controller but i dont know how to go further from Here, i know i have to do something with timers but cant figure out how to let it switch the relais on and off every now and then to regulate a slow increase of temperature. In my opinion a PI controller isn't the right thing for your problem.

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10/10/2024 7:50 AM	Rate (0)
AutoGen_4030457 Posts: 13 Rating: (0)	ixo65 U_51046b6f-37e0-4329-b416-93861ba11506 Well, what is have now is that when i press the start button it starts the pi controller but i dont know how to go further from Here, i know i have to do something with timers but cant figure out how to let it switch the relais on and off every now and then to regulate a slow increase of temperature. In my opinion a PI controller isn't the right thing for your problem. Can help me in the right direction? What is the right thing to use
AutoGen_4030457 Posts: 13 Rating: (0)
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10/10/2024 2:28 PM	Rate (1)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/14/2025 Posts: 35958 Rating: (4501)	May be this is what you want ... Attachment Oven_8.4.zip (417 Downloads)

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This contribution was helpful to 1 thankful Users qwazee

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