5/20/2016 12:43 PM | |
Joined: 12/18/2014 Last visit: 9/1/2024 Posts: 33660 Rating:
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LAD programming I do not like that. That's why I wrote the program in FBD and then converted to LAD. The times for each valve can be, if the sprinkler system is turned off, change over the display. AttachmentSprinkler.zip (180 Downloads) |
Last edited by: ixo65 at: 5/20/2016 12:59:23 PM |
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5/20/2016 1:10 PM | |
Posts: 6 Rating:
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Hi, Thanks for quick reply. I am totally opposite, I cannot do much in FBD. I have attached my program so you can check it. I have remaining time on display for each zone as well as system pressure, I have 4-20 mA analog input from pressure transmitter and all that works but as I said I would like it to reset once all timers count out and so far I was unable to make it happen. I will try with memory bit and let you know. Thanks AttachmentZalijevanje.zip (139 Downloads) |
5/20/2016 3:28 PM | |
Joined: 12/18/2014 Last visit: 9/1/2024 Posts: 33660 Rating:
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I have the same now done with your file. The change only in FBD and then converted to LAD. AttachmentZalijevanje_V2.zip (155 Downloads) |
5/20/2016 3:57 PM | |
Posts: 6 Rating:
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Hi, I made it as per your previous example and everything works perfect. Thanks a lot. I have few more questions and I hope you can help, as I said I have pressure transmitter connected and I am reading pressure in system on TDE but I was unable to use pressure value to control pump, at the moment I am using electronic pressure switch which is just on / off. What I would like to do is to use pressure transducer to control pump via LOGO relay output to VFD, for example Q11 to be 1 when pressure is below 3.8 BAR and Q11 to be 0 when pressure reaches 5.8 BAR. How this would be done? Another question is if there is possibility to set desired sprinkling time via TDE? for example sometimes I would like sprinklers to run 15 minutes each instead of 10 or something like that, would this be possible with LOGO or not? Thanks a lot AttachmentZalijevanje.zip (149 Downloads) |
5/20/2016 9:38 PM | |
Posts: 6 Rating:
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Hi, Quick update, I managed to control output to VFD by pressure transmitter input and now Q11 is 1 when pressure drops below 3.8 bar and Q11 is 0 when pressure reaches 5.8 bar. If you get chance have a look. Now, remains question about setting time by logo TDE. Thanks AttachmentZalijevanje with AI.zip (161 Downloads) |
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5/20/2016 10:26 PM | |
Posts: 5225 Rating:
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I urge you to re-evaluate your position. Please accept there is a very good reason why our expert uses FBD. I also retrain my students to use FBD for the LOGO and not the LAD taught in college. LAD for the LOGO contains flaws and does not code too well. Siemens included it to create the impression that they compete with other brands when it comes to LAD code for such devices. Just look at the official examples here: {LINK}. Yes it is a pain to change ones approach but it will be for the best in the long run. |
5/21/2016 8:46 AM | |
Posts: 5225 Rating:
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<ouch> AttachmentVisual clue_Link timers to one adjustment.zip (162 Downloads) |
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