old PID VIs compared to new ones

[Blokk]

Hello,

I need to "translate" or "convert" some PID parameters from an old project, written in LabView 6.1 to use it with the new LabView pid toolkit. I have LabView 2012 SP1 with PID toolkit.

When I open one of the old VIs, I can see a subVI called:

"NI_PID__autopid compat.lvlib: PID with autotuning.VI"

I looked inside, as much I as see, here the integral term is a multiplier. In the new PID toolkit manual, it is written that, the integral term is a divider in the PID equation.

Does it mean that, if I have an integral term in the old VIs like 30 minutes, I have to take its reciprocal, if I want to get the same behaviour for the integral term in my new PID toolkit?

thanks for help,

Regards,

[MHoffmann]

Hi,

I am not sure but shouldn't you be able to open the old VI's with LabVIEW 2012 as shown in the following link:

LabVIEW Module and Toolkit Compatibility Information

http://www.ni.com/support/labview/lvtool.htm#pid

I also found this link, maybe this is also interesting for you:

PID VIs Behave Differently in LabVIEW 8.2

http://digital.ni.com/public.nsf/allkb/70F14BFB5A11FE1F8625732B0061A2A6?OpenDocument

Regards,

Michael