Compact Logix Problem

nyanpasu · Oct 15, 2019

celichi said:
BTW, where would be a good place to learn ST?

I have been using Ladder and FB for 25+ years, never ventured down the ST path (yet).

Start with this for the very basics.

celichi · Oct 15, 2019

nyanpasu said:
Start with this for the very basics.

Thanks, I did not know they had this.

RTFM!

penend · Oct 15, 2019

Isnt is just:

Code:

FOR x:= 0 TO 31 DO;
	IF Source_DINT.[x] THEN
		Dest_DINT_Array[x]:= 1;
	ELSE
		Dest_DINT_Array[x]:= 0;
END_FOR;

JaxGTO · Oct 15, 2019

KISS:

XIC Tag.0 OTE D[0].0
XIC Tag.1 OTE D[1].0
XIC Tag.2 OTE D[2].0
..
..
XIC Tag.31 OTE D[31].0

32 rungs but you could make a AOI out of it.

Secpcb · Oct 17, 2019

Ken Roach said:
There's nothing inappropriate about brute force for a simple function like this. It's a very good opportunity to make use of the Add-On Instruction feature of ControlLogix.

Code:

If Source_DINT.0 Then Destination_DINT_Array[0] := 1 ; else Destination_DINT_Array[0] := 0 ; End_If ;

Ken,

I tried this as a test, created an AOI and it balked saying that the input & output tags for an AOI can not be dimensioned. And I tried to make Destination_DINT_Array a controller tag, but the AOI wouldn't see that as an available tag.

I don't have a lot of Studio5000 experience, so maybe I am missing something? I am using version 26.01.

Edit - I just looked at the latest posts and downloaded the structured text manual.

MorphuisOGrady · Oct 17, 2019

celichi said:
I could do an indirect rung, would take 32 scans to complete.

I am just doing brute force, at lease it will be easy to understand 3 months from now when someone is looking at it.

Thanks anyway.

I remember doing tasks like this in PLC5, which is why I couldn't figure this out in the logix PLCs

Why would you iterate once per scan? Complete the loop in a single scan. This simple loop will have no impact on your scan.

nyanpasu · Oct 17, 2019

Secpcb said:
Ken,

I tried this as a test, created an AOI and it balked saying that the input & output tags for an AOI can not be dimensioned. And I tried to make Destination_DINT_Array a controller tag, but the AOI wouldn't see that as an available tag.

I don't have a lot of Studio5000 experience, so maybe I am missing something? I am using version 26.01.

Edit - I just looked at the latest posts and downloaded the structured text manual.

Try setting your array parameter as an InOut parameter, like so :

Secpcb · Oct 18, 2019

nyanpasu,

I thought I tried the InOut type and got the same pop up, but I just tried it again and it works.

Thanks.

Compact Logix Problem

nyanpasu

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celichi

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penend

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Secpcb

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nyanpasu

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