Logix5000 Add On Instruction Scope Question

Lakee911 · Feb 13, 2008

Hi All,

If I create a bool tag in the AOI local scope, will it still be latched on the next scan? Will it be latched during brief removal of power?

If not, if it's created in the controller scope and passed to the AOI as a parameter, would it work at intended?

I do not need to access the latched tag outside of the AOI.

Thanks,
Jason

kamenges · Feb 13, 2008

If you need to maintain the status of something for the instruction to work, pass it as an In/Out paramter.

Keith

rdrast · Feb 13, 2008

A bool parameter created as a local tag, is maintained uniquely for each particular instance of an AOI. Ditto more complex structures like Timers.

That data area is what is created when you define a tag for the instruction's first parameter (named the same as the AOI).

Lakee911 · Feb 14, 2008

rdrast said:
A bool parameter created as a local tag, is maintained uniquely for each particular instance of an AOI. Ditto more complex structures like Timers.

So, if I understand you correctly, than the latch would be maintained?

Thx
Jason

Lakee911 · Feb 22, 2008

Anyone?

Lakee911 · Feb 25, 2008

Logix5000 Add On Instruction Scope Question

Lakee911

Member

kamenges

Member

rdrast

Lifetime Supporting Member

Lakee911

Member

Lakee911

Member

Lakee911

Member

Similar Topics