10/30/2016 8:31 AM | |
Posts: 67 Rating: (7) |
Hi, I want to make a little heat controller for my workshop. I've read a lot about LOGO's and temp. measurement. It looks like i would need an expansionmodule to read a PT100. However, PT100 have a large temperaturespan, which i don't need. (It will measure room temperature) I stumbled across Siemens QAA2061, which is a 0-50 C @ 0-10V, which i suppose my LOGO 8 would read? Datasheet here; Siemens QAA2061 Questions; Can I use this sensor with a LOGO8, reading it on an analog input? Can I "translate" the values to temperature some way, ie. to get a reading on a TDE? Can I make temp up and down in 0,5C increments using buttons on digital inputs. And further have a button to set a pre-defined night economy mode? Thanks in advance. |
Last edited by: cs_dk at: 10/30/2016 8:32:51 AM |
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10/30/2016 9:27 AM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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Your LOGO! has 4 analog inputs 0-10V. I have prepared a program for you. And you can switch via the relay outputs 230V AC. I would however in your place rather an additional relay or a solid state relay between the relay output of the LOGO! and the heater. AttachmentSetpoint.zip (838 Downloads) |
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10/30/2016 11:16 AM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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The LOGO! converts a voltage signal 0 -10 V or a current Signal 0/4 - 20 mA into 1000 units. The second counter in the setpoint processing is required if the setpoint is to be limited downwards, e.g. The setpoint should not be less than 15 ° C. AttachmentSetpoint_V2.zip (593 Downloads) |
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10/30/2016 11:28 AM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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Here's the next version.
AttachmentSetpoint_V3.zip (665 Downloads) |
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10/30/2016 2:57 PM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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Look at attached screenshots of V2 and V3. AttachmentScreens.zip (347 Downloads) |
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10/30/2016 3:41 PM | |
Posts: 67 Rating: (7) |
Shift I5 to I1, and it does not work anymore.. Can't figure out whats going on. AttachmentVarmestyring_V2.zip (369 Downloads) |
10/30/2016 4:01 PM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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You have the background lighting flags inserted into the program, that is not mine.
All functions okay, I can see any fault. Look at attached ideo. AttachmentTest.zip (340 Downloads) |
Last edited by: ixo65 at: 10/30/2016 4:02:31 PM |
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10/30/2016 4:20 PM | |
Posts: 67 Rating: (7) |
Sorry - I have inserted the flags later on.. If I use your program, the background is white without any flag? Doh.. I have figured the mystery out now, regarding I1 and I5.. The display is reading I5, and when i change it to I1, i'll have to change the display setting to. This should work. AttachmentVarmestyring_V3.zip (349 Downloads) |
Last edited by: cs_dk at: 10/30/2016 4:24:23 PM |
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11/5/2016 10:25 AM | |
Posts: 67 Rating: (7) |
I've been quite busy, so I did not go any further with this in the previous week. How ever, i have a NO switch as night/day switch - I can easily reverse it by a NOT gate. But that changes my night and day temp. selections as well. (Night changes day temp and vice versa). I can't see where excact the connection is, can you point me in the right direction? EDIT: Day temp seems to work, and starting the heater. Night however does not start the heater, even if 25C is requested. AttachmentVarmestyring_V4_Final.zip (354 Downloads) |
Last edited by: cs_dk at: 11/5/2016 10:31:18 AM |
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11/5/2016 11:02 AM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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What color should the display show by day? White or amber? |
11/5/2016 11:50 AM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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I took the color white by day. The error in the setpoint switching has resulted from your program change with the color markers. AttachmentVarmestyring_V5_Final.zip (337 Downloads) |
Last edited by: ixo65 at: 11/5/2016 11:51:35 AM |
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11/5/2016 9:20 PM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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I have revised the program again and the setpoint processing from individual blocks converted to UDFs. This makes the whole thing even clearer.
AttachmentVarmestyring_V6_Final.zip (363 Downloads) |
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11/6/2016 7:53 AM | |
Posts: 67 Rating: (7) |
Doh, what a bummer I have set a max at 25 C, if a switch should get stuck (unlikely, but anyway) Also the day program should be activated when I5 is high. I think this should work. For translation: Dag = Day, Nat = Night For rev. 6, i can't find the upper limits, nor the hysteresis adjustment. AttachmentVarmestyring_V5_1_Final.zip (327 Downloads) |
11/6/2016 8:31 AM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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For V6.1: A double click on the UDF opens the parameter list.
AttachmentVarmestyring_V6.1_Final.zip (323 Downloads) |
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11/6/2016 8:42 AM | |
Posts: 67 Rating: (7) |
Thanks, that makes sense.. I'll give, it's a lot cleaner that way. |
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11/6/2016 9:22 AM | |
Posts: 67 Rating: (7) |
So, just have to wire it up.. How much ventilation do I need to make in the box? AttachmentPhotos.zip (329 Downloads) |
11/6/2016 9:36 AM | |
Posts: 67 Rating: (7) |
So ie. one ø40 mm hole with a filter in top and bottom should be enough. There should be some natural flow i guess. |
11/12/2016 10:07 AM | |
Posts: 67 Rating: (7) |
Finally my Siemens QAA2061 arrived - It's all up and running. It works like a charm. I've played around, added a VFD output for fan control. Also some counters. (Haven't tested it yet) Is it possible to automatic update the reset date on display 2? AttachmentVarmestyring_V6.2_Final.lsc.zip (366 Downloads) |
11/12/2016 10:56 AM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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No, to my knowledge it is not possible. The only way I see is to create your own message text with priority 0. After each reset, the message text is reactivated and the time and date of the reset are displayed. If several message texts are activated at the same time, the message text with the highest priority is displayed. AttachmentVarmestyring_V6.3_Final.zip (316 Downloads) |
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11/12/2016 11:11 AM | |
Posts: 67 Rating: (7) |
Thanks, I'll give it a try on the device, to see how it behaves. |
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11/12/2016 11:44 AM | |
Joined: 12/18/2014 Last visit: 9/26/2024 Posts: 33838 Rating: (4205)
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When you do this, my suggestion does not work anymore with the own message text for the reset Display. |
11/13/2016 8:44 AM | |
Posts: 67 Rating: (7) |
Got a little further in this. Now there should appear a warning to order fuel when 400 hours is reached (set to 1 minute for simulation) It's actually quite fun to play with this little device. I am overwhelmed by all those possibilities. Everyday i got a new idea, with a feature to add.. Maybe i should remove "final" from the filename I guess there will never be a final version. LOL I'll still have to work with a timestamp, so i can see, when i last ordered fuel. AttachmentVarmestyring_V6.2.1_Final.lsc.zip (330 Downloads) |
Last edited by: cs_dk at: 11/13/2016 8:45:54 AM |
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11/14/2016 5:51 PM | |
Posts: 67 Rating: (7) |
Think I got it now.. 0 is not highest priority, in my world it would be.. The LOGO! seems to have a different opinion.. I think it works now. Until I find another feature, that would be nice to have. It will switch from red to amber diaplay, when night setting is on, but i can live with that. The message will appear, and that is most important.. AttachmentVarmestyring_V6.2.2_Final.lsc.zip (370 Downloads) |
11/16/2016 7:38 PM | |
Posts: 67 Rating: (7) |
Add'et a timer for daily start.. The temp is displayed as auto, but it is the day temp setting. I just wanna make sure no one alters the settings. There for the "Auto" (keep your fingers away) message. It should run for some time, and if i don't switch on the day switch - Well, then there is no car on my lift, no work should be done, and it can go to night mode again. If there is something in the garage, then it will have preheated some time before i enter. Win win. :) Will have to see, if it works tomorrow. AttachmentVarmestyring_V6.2.3_Final.lsc.zip (344 Downloads) |
12/11/2017 9:37 AM | |
Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8175 Rating: (172) |
New question published by telegramteknik is split to a separate thread with the subject Want to use a PT1000 sensor, which parameters do have to change?. Best regards |