6/16/2015 3:32 PM | |||||||||||||||
Posts: 70 Rating:
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Hello, I’m new to working with PLCs and with Step7/Siemens so every help would be appreciated.
I’m trying to measure the instantaneous flow rate of water passing through a sensor however it is not working very well for me. The sensor I’m using is an Omega component (FTB2003) which has the following characteristics (http://www.omega.com/manuals/manualpdf/M3236.pdf):
And the output signal is a square wave signal, whose frequency varies linearly with the flow rate.
To analyze the signal I followed the help given to me here in the forum, however, is still not working and I do not know what went wrong or how to fix it. I’m using a S7-1200 CPU 1214 DC/DC/DC and a Relay module to power the sensor. What I did was to enable a HSC (high-speed counter) with the characteristic shown in the figure attached (but I do not know if I choose it correctly). After that I used a Norm_X and a Scale_X functions like the figure. Now, I do not know what to do. Do I need any other function also? Can someone help me please? Thank you in advance
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6/16/2015 4:05 PM | |
Posts: 70 Rating:
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I wired it in the I0.4 input of the CPU (Sorry I forgot to say this). Thanks |
6/16/2015 4:35 PM | |
Posts: 1058 Rating:
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Maybe you might find this interesting: Sample Program: S7-1200 High Speed Counter (HSC)
regards
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6/16/2015 4:46 PM | |
Posts: 70 Rating:
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Hello eisenpferdreiter, Does that program exists in the V13 version? Is just because when I try to open it, it gives an error and does not open. Thank you |
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