Simple string question

[tomezak1234]

Does anyone know how I can get a "." into a STRING like ST8:0 I am fairly new to PLC programming. I am working with RSLogix 500 software.
I need to put a FLOAT into a STRING and I understand the rest of the process, but I don't know how to actually get the decimal point into a STRING.

Thanks,
Tom

 

[OkiePC]

http://www.plctalk.net/qanda/showthread.php?t=29897

See if this thread has anything that helps...

Paul

 

[Ken Roach]

The ASCII code for a decimal point is 46 (decimal) = 2E (hex).

One way to "insert" a decimal point into your string is to move it into the position you require.

Because Strings in the SLC-500 controller have Data[x] words that contain two characters, you need to figure out which STx:y.DATA[z] word contains the position you want the decimal point, then use a Masked Move to place the decimal point in the character you wish.

This can be pretty tricky, so many users choose instead to concatenate three strings: the whole number string, a string with only the decimal point, and the fraction number string.