Profil Beiträge anzeigen Erfahrener Benutzer Registriert seit 07.05.2004 Ort Campbelltown Beiträge 2.500 Danke 131 Erhielt 293 Danke für 86 Beiträge. For example in a if else function, if i0.0 is positive then i want a positive edge trig to q0.0. Yes the problem was using it in a FC, i tried to use it in a FB by defining the old value as static, as you told and it is solved.Your FC can also be called in a FB and the variables can be defined as static as mentioned earlier.Anyway, here's my P_Pulse FC which I'm always using within a FB.The code will work in an FC if the old value is in IN-OUT.Yes, but only if the actual variable assigned to the in-out will be static.In your code replace #edge with #SignalQ in the first line of the body and get rid of #edge and this fancy IF completely.
How can i use P_TRIG or N_TRIG in a SCL script. R-Trig -> im Prinzip das Gleiche, nur mit der zusätzlichen Möglichkeit, die Flankenprüfung über einen separaten Eingang frei zu geben bzw. I think my script was not true. How can i use P_TRIG or N_TRIG in a SCL script. the trick is to store the state of I0.0 every program cycle.Store the value of I0.0 from the current cycle and also from the previous cycle.If the value of I0.0 was false in the previous cycle and true in the current cycle, then we have a positive edge.If the value of I0.0 was true in the previous cycle and false in the current cycle, then we have a negative edge.the trick is to store the state of I0.0 every program cycle.Store the value of I0.0 from the current cycle and also from the previous cycle.If the value of I0.0 was false in the previous cycle and true in the current cycle, then we have a positive edge.If the value of I0.0 was true in the previous cycle and false in the current cycle, then we have a negative edge.The instructions you speak of is R_TRIG and F_TRIG.As bonus, a variation on the theme, detecting rising and falling edge - First of all thanks for your answers, here is how i tried to write the code;Thanks William for your example, i will also try one including the ones you have written. I tried one although encountered a problem; program sent 3 times the same trig to output. R_Trig in SCL 20.06.2006, 12:17 #2. plc_tippser. I am not sure that the one i have written is working as an edge trigger.The problem is that you use an FC. zu sperren. Rating: (2) It's Working, how can i do the positive & negitive edge in SCL.
is my below code is right or not.It's Working, how can i do the positive & negitive edge in SCL.Sorry, but it's wrong. Link to post Share on other sites. A quien no le interesa capturar un momento o instante en función de la activación o desactivación de una señal de entrada, salida o variable y no estoy hablado de usar eventos (interrupciones) no! P-Trig -> prüft das Ergebnis der kompletten vorhergehenden Verknüpfungskette und das Ergebnis kann weiterverknüpft werden. It doesn't claim to be compliant, just based on IEC61131-3 SimonGoldsworthy Better is to handle the boolean logic in a separate FB with LAD or FBD, and then call the SCL block for doing the more complex stuff. I don't mean code itself, BUT if you use function (and not FB) you don't have STAT variables. Capturar un momento, en programación SCL y las instrucciones R_TRIG y F_TRIG. Ich kenne da auch keine, im Zweifelsfall musst du dir diese selber basteln. "S7-SCL is a text-based high-level language based on the IEC 61131-3 language Structured Text (ST). new subject after splitting from /tf/WW/en/Posts/80956#top The only thing you should add is your counter logics as above code is working fine. I tried one although encountered a problem; program sent 3 times the same trig to output. Instead of taking signal from outside i want to take the signal when the block is enable. but my output is incrementing only once. This code should be in an FB and the SignalOld variable must be static (VAR_STAT).Look again inside TIA if you using the parameters in the right way. Yes the problem was using it in a FC, i tried to use it in a FB by defining the old value as static, as you told and it is solved. For example in a if else function, if i0.0 is positive then i want a positive edge trig to q0.0.
Share this post. !. Last visit: 9/11/2018. On the other hand storing #OldPE variable in TEMP area is just wrong - result would be unpredictable. i.e, When we give EN signal to the FUNCTION. Wish everyone is doing fine, i wanted to ask a question about SCL programming language that i could not solve.
Joined: 5/11/2011. Posts: 303. SCL is great for pointers, algorithms, string manipulation and such, but sucks at "normal" logic code.
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