4/4/2020 1:57 PM | |
Joined: 10/4/2019 Last visit: 8/17/2024 Posts: 110 Rating:
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hi dchartier and thank you for replying this is a screenshot of my FB41 implementation in Online mode i followed this video and i did the same as he did but it doesn't work for me https://www.youtube.com/watch?v=Qx9J2huoc0w&list=PLJu_8UAZ5weC-cSBww2G-UpSkgFe_1gn3&index=5 |
Last edited by: Jen_Moderator at: 04/06/2020 09:20:34Embedded video. |
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4/4/2020 6:55 PM | |
Joined: 9/27/2006 Last visit: 8/26/2024 Posts: 12279 Rating:
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Hello adamlahadi; Thank you for posting the online version of your FB41. It helps. The video seems quite good, although my arabic is not quite good enough to follow all the details. You seem to understand the basics of all the important parameters of FB 41. But your block still shows many problems not yet corrected, for which I gave you suggestions already. Please try to correct them now: - how do you set and reset Com_Rst? The block must run at least one scan cycle with Com_rst at 1, then it must be at 0: Suggetion: Set it in in OB100, reset it as the last instruction in OB 35 (or in OB1). - the MAN parameter is at 1; the block must run a few scan cycles at MAN=1, then for automatic mode you have to switch MAN=0. - your Cycle parameter is still at 2ms. What is the time value of OB 35 in your configuration (check in the CPU properties), normally it is at 100ms. Put Cycle at the same time period as OB 35. Other parameters, such as PVPER=1, Gain, TI.... can be checked later, once you can test that the CPU actually runs the PID block. Check these articles for more information: Where can you find descriptions and examples of PID control with FB 41, FB 42 and FB 43, and SFB 41, SFB 42 and SFB 43? (open the System and Standard Functions manual) https://support.industry.siemens.com/cs/ww/en/view/16532187 What should you watch out for when calling and assigning parameters to the controller functions in function blocks (S)FB41, (S)FB42 and (S)FB43? https://support.industry.siemens.com/cs/ww/en/view/18459342 Best way to call a PID (FB41) Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 04/04/2020 18:58:32 |
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12/28/2022 5:06 AM | |
Joined: 3/28/2020 Last visit: 8/22/2024 Posts: 2 Rating:
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Dear All, Go through the detail video with this below link for fb 41 CONT_C fungtionality https://youtu.be/abHgrjz3sGw |
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