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build a controller

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Old   July 5, 2013, 05:37
Default build a controller
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Martin
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Hey guys,

I would like to build a controller which regulates a boundary condition. For this job I need a PI-Controller. To create the (p)ropotional part is no problem with reports and fieldfunctions. The (i)ntegral part however is quite confusing since I need some kind of variable which I can change its value.

v_new = v_old + something

Due to the fact that reports and fieldfunctions are read-only I stuck here. Actually I just need a read- and writable variable.

Any tips?
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Old   July 5, 2013, 08:31
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David
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Cant you do it also with a field function? Does the field function admit something like:
Suppose F1 is the field function
$F1+ whatever

Good luck, i am also interested
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Old   July 5, 2013, 09:27
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Martin
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nop unfortunately not. this was my first hope, but an error will be the result (self-referencing)
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Old   July 5, 2013, 09:47
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Quote:
Originally Posted by wernsen View Post
nop unfortunately not. this was my first hope, but an error will be the result (self-referencing)
Have you considered using a macro then?
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Old   July 8, 2013, 03:28
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Martin
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Quote:
Originally Posted by GM_XIII View Post
Have you considered using a macro then?

yes but I thought / hoped that there will be an asier way
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