11/7/2018 1:34 PM | |
Posts: 2 Rating: (0) |
Hello everyone. I am programming a safety system for pressure testing using a LOGO! 8.FS4 (I think) and a TDE display. This systems read a pressure transmitter, and compare this value to a user changeable shutdown setpoint which is set via a up/down counter (B006 in my diagram). When the pressure reaches the shutdown setpoint, it sends a signal (via Q2) to the main controlling system to blow the safety valves. This I have managed to achieve. However, I want this system to first send a warning signal (via Q1), and I want this to happen e.g. 10 bars below the actual shutdown pressure, without having the user to manually input the warning setpoint also. I cannot get the actual value from the counter, which I would like to subtract 10 from, and use as setpoint for the warning output. Sorry for the long explanation. I will post my program. I should also point out that I am very new to this :) Hope someone can point me in the right direction. Regards TT AttachmentGasBoosterSafety.zip (159 Downloads) |
11/7/2018 3:33 PM | |
Joined: 5/13/2016 Last visit: 1/15/2022 Posts: 66 Rating: (5) |
Hi, I've made a small modification to the program, just to give you a push in the right direction. AttachmentGasBoosterSafety.zip (198 Downloads) |
This contribution was helpful to1 thankful Users |
11/7/2018 6:23 PM | |
Posts: 2 Rating: (0) |
That is exactly what I was after. Works perfectly. Thank you very much :) Regards TT |
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