7/11/2017 12:38 AM | |
Posts: 42 Rating: (0) |
Mr oreca can you please explain the workking of vlvanl or post a sample example for its connections diagram |
7/11/2017 7:45 AM | |
Joined: 3/14/2008 Last visit: 10/8/2024 Posts: 2109 Rating: (941)
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Hi, I assume you checked the help file already? In short the valve works like this: VlvAnL is a valve that outputs an analog value so you can put the valve to a specific position. Apart from the valve itself, it has an option to control an auxiliary valve in conjunction with the valve. The has digital feedbacks (open, close) and/or analog readback (actual position of the valve). The valve can be opened or closed so it will go to the configured limits. The digital contacts must be available. The valve can be set to a specific position also.You can adjust the opening and closing position by yourself (PosDiOpen and PosDiClose). If you don't want to use Feedback open and/or close, make sure you set NoFbkOpen en NoFbkClose to 1. Otherwise feedback errors popup. The analog position is checked with the readback signal. If you don't have a readback signal, make sure you interconnect MV output with Rbk input, otherwise you will receive an error. |
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This contribution was helpful to1 thankful Users |
7/11/2017 10:51 PM | |
Posts: 42 Rating: (0) |
Mr oreca please can you post an example for use of this block vlvanl it will be so nice you. just a simple example on how to use it |
7/12/2017 6:58 AM | |
Joined: 3/14/2008 Last visit: 10/8/2024 Posts: 2109 Rating: (941)
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Hi, If you need some example, you can better use the Siemens Process Tag Type templates. Siemens provided a lot of PTT for you to use which are configured and tested. To get them, do the following: 1. Open Simatic Manager 2. Click File->Open and select column: Libraries. 3. Search for PCS7 AP Library V82 and click OK 4. Select View->Plant View and open hierarchy folder: "Templates/Valves". Open CFC: "ValveAnalog or Valve_Fb. You can copy the template(s) to your project if you want. |
If I could help you, you can use the RATE button. Thank you. |
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This contribution was helpful to1 thankful Users |
7/12/2017 9:52 PM | |
Posts: 42 Rating: (0) |
thanks sir i will try that for sure |
7/14/2017 6:57 AM | |
Joined: 3/14/2008 Last visit: 10/8/2024 Posts: 2109 Rating: (941)
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Goodmorning! I assume you have connected a readback value to input Rbk? It does not matter if the signal is simulated by an input word or it is a direct connection to output MV. But it could be that the readback signal is delayed too much. The MonTiDynamic value is default set by 3sec, meaning the readback value should have the MV output value within 3 seconds (A hysterese is available as well so that Rbk does not have to be exactly the same as MV value. The PosDiOpen en PosDiClose variables are important too, because they will say to the valve that the end position is reached....The MV must be >= than PosDiOpen + Feedback open must be present. The same goes for PosDiClose, where MV must be <= PosDiClose + Feedback close. If you don't want to use FbkOpen and Close, you can set NoFbkOpen and NoFbkClose at "1", meaning the digital feedback signals are not used. If you still have problems, please post a screenshot and I'll take a look at it.
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If I could help you, you can use the RATE button. Thank you. |
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This contribution was helpful to4 thankful Users |
7/14/2017 8:50 PM | |
Posts: 42 Rating: (0) |
thanks mr oreca you helped me a lot |
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