5/7/2020 12:30 AM | |
Posts: 2 Rating: (0) |
Dear daniel I need to program readymix concrete plant by using 4 to 20ma signal (through weighing indicator ) . Can u help me to do it do you have some example .i already know about the scale function using fc105. How can i program calibration function ? Am hoping to use s7300 plc
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Last edited by: Jen_Moderator at: 05/07/2020 10:00:52New subject after splitting |
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5/7/2020 12:53 AM | |
Joined: 9/27/2006 Last visit: 9/21/2024 Posts: 12282 Rating: (2684)
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Hello mlthenuwara; A lot depends on the specific weighing module you will be using. Its datasheet and manuals must contain information on output signals wiring and calibration procedures. It would be helpful if you could provide this information, or at least the links to the documents; at the very least we need to know the manufacturer and model of the unit, so we can search for the information. On the S7-300 side, you will need a Analog Input module capable of reading the 4-20 mA signals from the weighing unit. Do you have one in hand, or are you at planning stage? In any case, this manual on S7-300 modules has a chapter on Analog modules, where you can find much interesting information on configuration and wiring of the AI module you choose. https://support.industry.siemens.com/cs/ww/en/view/8859629 Once you have integrated the AI module into your hardware configuration and wired it properly, you will get numerical readings in the addresses attributed to your AI module. These values will be in a range of 0 to 27648 (for a signal within acceptable range), and to be useful you will have to use FC 105 to scale it to an engineering value. But we can talk more about this when you have been through the first essential steps. Hope this helps, |
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