PID

[s66knot 0]

J'ai une température (entrée analogique) à réguler grace à une arrivée de vapeur (1 sortie ouverture vanne et 1 sortie fermeture vanne). Comment faire sachant que je peut connaitre la position de ma vanne ??? URGENT SVP!!!!

[BITS N BYTES 66]

Quelle modele de processeur et module analogue?

[s66knot 0]

CPU OMRON CJ1M-CPU11 AVEC CARTE MAD42

[BITS N BYTES 66]

http://forums.mrplc.com/index.php?showtopic...t=0entry15063 http://forums.mrplc.com/index.php?showtopic...c=3412&hl=PIDAT C'est absolument necessaire d'obtenir le manuel dernier. http://forums.mrplc.com/index.php?act=Downl...&CODE=02&id=374 Toutes en Anglais mais beaucoup d'information.

[Jay Anthony 118]

When y'all get finisht, how about lettin' us in on it?

[s66knot 0]

La fonction PID ne me pose pas de probleme. Comment convertir le résultat PIDAT pour piloter les deux sorties ????

[BITS N BYTES 66]

'The PID function itself is not a presenting me any problem. But how do I convert the PIDAT result to control my two outputs?" There's your translation Jay!

[PdL 71]

Digital outputs ? Scale your PID output to a value, for instance your valves running time in seconds or ms, whatever gets you a a good resolution. If the PID output is less than the lower half of the scaled value, control output 1 (close the valve) If the PID output is greather than the upper half of the scaled value, control output 2 (open the valve) Or vice versa, depends on your situation You might want to put a time pulse between the open/close contact and the output coils. Or a dead band in between the value comparison. All depends on your situation. Anyway, that's my idea. BITS_N_BYTES if you would be so kind to translate Edited 27 May 2005 by PdL