ASCII and Decimal value displays

[bxg1983]

Hello,

I have a SINT array I am receiving and one of the positions of this array contains the direction of the product.

Inside the ladder logic the value corresponding to the position of this array displays as a decimal. What would be the most efficient way of getting the ASCII value equivalent inside the ladder logic instead of the decimal?

 

[drbitboy]

What does "Inside the ladder logic" mean?

Are you looking at an element of a SINT array in the online mode of some RSLogix 5/500/5000 or Studio 5000, and that element is displayed as a integer value between -128 and +127?


And what does "ASCII value equivalent" mean?

Is the value of the SINT array element (above) displayed as the integer 49, and you want to see the ASCII character '1' or summat similar?

 

[bxg1983]

That last part of your message summarizes it the best, I am getting back the integer values and would like to see the ASCII returned.

 

[drbitboy]

I assume this is Rockwell/Allen-Bradley, Logix because that has SINTs.

So, a string tag, call it the_string, in Logix is a structure with two parts:

• the_string.LEN - An INT that is length of the string
• the_string.DATA[] - An array of SINTs that contain the data - i.e. ASCII characters - for the string.

So if you MOV the SINT element from your array to the_string.DATA[0], and MOV a length of 1 into the_string.LEN, then the string tag called "the_string" might contain what you are looking for.


Cf. here and Example 2 here.

 

[AustralIan]

change the Style column to ASCII like in this first screenshot here:


https://www.plctalk.net/qanda/showthread.php?t=128881