I am new user of Lookout 4 evaluation.

[scintilla]

My question is what kind of object I should create to meet the requirement of valve which I could control the percentage of opening like the example batch2.
And how I can count time and return it as a parameter.
Thanks very much!! I want to simulate all the process on the software, so dont have any serial ports and plcs.

[Greg Caesar]

A valve can be simulated in numerous ways with Lookout. If you are simulating a valve that is just open/close, then a switch object is one method. If it is a control valve, then an expression object could be used that ranges from 0-100, for 0-100% open. But really, the possiblities are endless.

As for returning time, Lookout has a "Timers" directory of objects that should hold what you are looking for, including an "ElapsedTime" object.

Regards,
Greg