ASCII array to REAL

[LHiddle]

I have a SINT[500] array that is pulling data from a scale. The maximum number of characters that can be sent by the scale is 6, and there are two termination characters following the data (r and 1). If 123 is sent, is would show as:
1
2
3
$r
$1

If 13.264:
1
3
.
2
6
4
$r
$1

I need to take this array and convert it to REAL. Any ideas of how this could be done?

 

[GaryS]

I assume you are using RS5000 you didn't say
use the STOR String to Real function (String to Real )
Strings in RS5000 are stored as an array of SINT's representing the ASCII value of the characters
you may have to strip off characters to show the true value

 

[DaDaDadeo]

I corrected this post. The STOR works accurately up to the 5th decimal whereas the RTOS does not.

The RTOS has too many deviations. The DTOS is accurate and using a sub routine that breaks down a REAL into DINTs using math and concatenates can be as accurate as the programmer wants it to be. Even Rockwell understands that the Real To String has its problems.

Move or copy SINTs into Temporary_String.DATA[X], run the string through STOR.

 

[LHiddle]

"You can use a combination of STOD (String to DINT)and math instructions. Move or copy SINTs into Temporary_String.DATA[X], run each string through STOD. Multiply by the necessary 10s, and add together."

Thanks! How would I address the decimal place and termination characters?

 

[GaryS]

I don't think the (STRING to DINT) can handle the decimal point very well I would us the (STRING to REAL) the REAL data type has a decimal point

 

[DaDaDadeo]

I corrected the post about STOR after testing it with the emulator. The STOR ignores non-numberical characters.

 

[LHiddle]

Thanks, GaryS and DaDaDadeo! STOR worked.

 

[JaxGTO]

I would just use like 10 (to cover the longest number of digits) conditional (not equal to terminator) CONCAT functions to build a string then use the string to real. That will handle the moving decimal point as well.