ControlLogix Postscan

[VulcPAC]

Hi everyone:

I have a doubt about postscan in RSLogix 5k, for example in help file for OTE instruction, says that in Postscan The rung condition-out is set to False.
What is the postscan and "when", at what exactly moment, it happens?

Thanks

 

[Ron Beaufort]

Postscan comes into play when you're using the SFC (Sequential Function Chart) programming feature ... basically you're telling the system how you want the OTE to handle its bit/box address when it LEAVES a particular step in the chart ...

in other words:

turn the lights off when you leave ...

or ...

just leave the lights on when you leave ...

TIP: if you're not using SFC programming, don't worry about the Postscan ...

 

[VulcPAC]

TIP: if you're not using SFC programming, don't worry about the Postscan ...

Thanks Ron for your answer, that was precisely the point that I needed to know. Now I can breathe easily

Regards