How to write an ASCII value into a string in Structured Text for a PLC?
For a PLC program written in Structured Text I need a string which starts with the ASCII values 0x01 0x01 0x01 0x00 0x12.
In Java I would do this with:
String literal = "\x01\x01\x01\x0\x12";
How can I achieve the same in Structured Text for a PLC?
Answer
It appears that IEC-61131's escape sequence is $hh, so just use
'$01$01$01$00$12'
see STRING data type https://en.wikipedia.org/wiki/IEC_61131-3#Data_types
they show some example string literals using $ as the escape sequence character (ala \ in C/C++/Java)