ATOH

 Function A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. - Converts string to integer using hexadecimal basis.

Inputs

Input	Data Type	Range	Unit	Default	Description
IN	STRING				String representing an integer in hexadecimal format.

Outputs

Output	Data Type	Range	Unit	Description
Q	DINT			Integer represented by the string.

Truth Table

IN	Q
''	0
'12'	18
'a0'	160
'A0zzz'	160

Remarks

• The function is case insensitive.
• The result is 0 (zero) for an empty string.
• The conversion stops before the first invalid character.

FBD Language

FFLD Language

• In the FFLD language, the operation is executed only if the input rung (EN) is TRUE.
  • The output rung (ENO) keeps the same value as the input rung.

IL Language

• In the IL "Instruction list" This is a low-level language and resembles assembly language, the first input must be loaded before the function call.

Op1: LD "Ladder diagram"
Ladder logic is a method of drawing electrical logic schematics. It is now a very popular graphical language for programming Programmable Logic Controllers (PLCs). It was originally invented to describe logic made from relays. The name is based on the observation that programs in this language resemble ladders, with two vertical "rails" and a series of horizontal "rungs" between them  IN
     ATOH
     ST  Q

ST Language

Q := ATOH (IN);

See Also

HTOA