How can I Open and close a valve with S7 300

[nadiasamira]

I have to open and close a butterfly valve from 0 to 100 %. The valve works of 4-20 mA and I must use the FC 106. I have some ideas but I'm not sure about them. Can you help me?
This is what i have so far. I save the value betwen 0 and 100% in "ini" and put it in IN. put the max value (100) in H_lim and min value(0)in L_lim. Manual and s1 must be on to use de FC106 so Bipolar is in off all the time.
I don't Know if I can put the out PAW direct from the OUT of the FC106, but i did it.
Please show me how to do it right!

 

[Guimmie]

Aparentemente todo esta bien... no acabo de entender porque usas la misma marca para la entrada de activación que para la bipolaridad (#manual)...
Te recomiendo que uses AWL y asi puedas fijarlo a false, es decir:

U #manual
U #S1
SPB fina
CALL FC 106
IN := "ini"
HI_LIM := 1.0e+002
LO_LIM := 0.0e+000
BIPOLAR := FALSE
RET_VAL := MW34
OUT := PAW304
fina: NOP 0

No obstante, de la forma que tu lo has hecho, deberia funcionar... quizas sea un problema de solapamiento de marcas... o de harware...

Tampoco se como escalas el valor en 0.0 y 100.0 que metes en "ini"... si das un poco mas de informacion igual podria ayudarte mas.

Nos vemos!