[TRNSYS-users] EQUATION

[Angela Dröscher]

Wang,

in a simple equation with LT and GE you won't be able to realize a controller with a hysteresis (at least it seems that's what you want) - if possible at all I guess you would additionally need Type93 to get the value of OF from the previous timestep.

Why don't you use a controller with hysteresis such as Type2d?

Best regards,
Angela


Am 02.11.2011 14:03, schrieb 王洋:
> Dear all,
>
> Please tell me how to set an equation:
>
> OF=1, when CO2%>1000
>
> OF = 0, when CO2%< 700
> I tried to use LT and GE, but e.g. it only realize OF = 1, when CO2%>1000 and OF = 0, when CO2% < 1000.
> I need
> OF=1, when CO2%>1000
>
> OF = 0, when CO2%< 700
>
> Thanks in advance!
>
> wang