Compact GuardLogix MSG result tag conversion dint to ascii

[Jake98]

Im trying to use a MSG instruction to get the serial numbers of all addon cards and display the serials on a HMI interface. I have the logic done and everything works except that the MSG returns a number instead of raw string. The number converts to ASCII characters but I want a plain string to show on the HMI. All of the logic is written inside of an AOI which uses a IN/OUT to import the message result.

EX. MSG Returns Dint(-794295010)
Converted to ASCII would be String("$D0$B2$C2$EC")
What I want is String("D0B2C2EC")

Software: Studio 5000 Rev 34.011
Controller: 5069-L306ERS2

 

[JeremyM]

Here’s a starting point. AOI accepts a DINT (serial number size) and provides an ASCII representation.

 

[drbitboy]

I am not sure about the syntax, but this might work:

VAR

lcldint : DINT;

nibble : DINT;

hexchars : STRING(16); := '0123456789ABCDEF';         (* The sixteen hexadecimal characters in character positions .DATA[1] to .DATA[16] *)

String_result : STRING(8);

END_VAR;



lcldint := input_argument;



FOR i=8 to 1 BY -1 DO                                 (* Loop over output string characters from right to left *)

    nibble := lcldint AND 15;                         (* Bit-wise and of low four bits *)

    lcldint := lcldint / 16;                          (* Shift next four bits to the right *)

    String_result.DATA = hexchars.DATA[nibble+1];  (* Next hex character *)

END_FOR;