RS 5000: Use OneShotRising in ST?

theColonel26 · Mar 9, 2020

I am using RS 5000 v30. I am trying to use the OSRI AOI to detect a Rising Edge.

OSR_EnableACC is of Type FBD_ONESHOT

EnableACC is what I want to detect the Rising Edge on.

Here is my Code

Code:

OSR_EnableACC.InputBit = EnableACC;

OSRI(OSR_EnableACC);

IF OSR_EnableACC.OutputBit Then
    //Do Somthing
END_IF;

I am getting a

Error: Line 1, ';': Unexpected.

kolyur · Mar 9, 2020

I'm not well versed on Rockwell's structured text, but if it follows IEC61131 then you need to use := as the assignment operator.

Code:

OSR_EnableACC.InputBit := EnableACC;

theColonel26 · Mar 9, 2020

kolyur said:
I'm not well versed on Rockwell's structured text, but if it follows IEC61131 then you need to use := as the assignment operator.

Code:

OSR_EnableACC.InputBit := EnableACC;

that was the problem. It's been awhile since I used ST.

I forgot about it's weird PASCAL like syntax.

Thanks

JeremyM · Mar 9, 2020

Curious - why not DIY:

Code:

if (condition & not OneShot) then
   // do something
end_if;
OneShot := condition;

theColonel26 · Mar 9, 2020

JeremyM said:
Curious - why not DIY:

Code:

if (condition & not OneShot) then // do something end_if; OneShot := condition;

Well I have done that in the past, and might still do it. But I am trying to reinvent the wheel less.

AB doesn't have plain User Defined Functions does it? Just FBs aka AOIs.

I'm gonna start a new thread about Functions.

RS 5000: Use OneShotRising in ST?

theColonel26

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