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Creating trends and plots

Created by: Pandiani at: 9/19/2008 10:43 AM (6 Replies)

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9/19/2008 10:43 AM	Rate (0)
Pandiani Bronze Member Joined: 10/31/2005 Last visit: 4/22/2025 Posts: 366 Rating: (31)	Hello, I'd like to create trends in order to observe how some of PLC's variables (real number format) are changing. I need this only temporary for testing. I know it's fairly easy to create trends in WinCC or WinCC flexible, but I wonder if this can be done in some other software?Thank you

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9/19/2008 11:03 AM	Rate (0)
Anchobi Posts: 139 Rating: (25)	You can try different types of data loggers if you are not after a SCADA system. This mob (just to give you an idea) sells data loggers which will store the data directly on your PC and they have modules which you can tap onto profibus and spy the values across the bus or connect directly on to the analog signals. http://www.iba-ag.com/content.php?PHPSESSID=b583a77abado930kq8u08ki5e3&ID=37 but you will also have to consider cost, and it may be that it is just as cost effective to set up alaptop with WinCC or Flexible. tAlthough the data loggers do have the advantage of having a much higher resolution than the communications update cycle of a SCADA system and typically dont tax the CPU communications processor.
Anchobi Posts: 139 Rating: (25)
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9/19/2008 12:01 PM	Rate (0)
Pandiani Bronze Member Joined: 10/31/2005 Last visit: 4/22/2025 Posts: 366 Rating: (31)	Anchobi, I had different thing in mind. I want to use it for test purpose. For example, I want to tune PID controller and want to see response and controller output change when changing setpoint. That would be usefull in all situations where there is a need for controlling process without SCADA. Can CFC do that? Obtianing WinCC or WinCC flex would be overwhelming....

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9/19/2008 1:41 PM	Rate (0)
Victor Tech Experienced Member Joined: 12/24/2007 Last visit: 5/26/2025 Posts: 26 Rating: (0)	Chech the manual here. We use this feature to create quick trends for just such a purpose. http://support.automation.siemens.com/WW/view/en/24451339 (Page 215)
	Last edited by: O_Moderator at: 5/17/2013 2:17 PM
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9/19/2008 2:31 PM	Rate (0)
Anchobi Posts: 139 Rating: (25)	That sounds cool, i havent played around with CFC before as i tend to stick to my kop fup awl, but i will have a play with this when i get beck to the office in a few weeks time If you dont mind and if you have time could you post a screen shot of the CFC trend?
Anchobi Posts: 139 Rating: (25)
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9/19/2008 4:10 PM	Rate (0)
Victor Tech Experienced Member Joined: 12/24/2007 Last visit: 5/26/2025 Posts: 26 Rating: (0)	Here you go..Note that there is no history. only trends values while open and online Attachment CFC Trend.JPG (919 Downloads)

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9/19/2008 7:24 PM	Rate (0)
Pandiani Bronze Member Joined: 10/31/2005 Last visit: 4/22/2025 Posts: 366 Rating: (31)	Victor, thanks, it is just what I needed. i heard before that this is possible with CFC.I have CFC installed on my PG. I'll take some time to learn how to do it and then I can use it as demonstartion tool for my PID simulator in S7-SCL...

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