bcd_to_bin

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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 a BCD (Binary Coded Decimal) value to a binary value.

Inputs

Input	Data Type	Range	Unit	Default	Description
IN	DINT				Integer value in BCD.

Outputs

Output	Data Type	Range	Unit	Description
Q	DINT			Value converted to integer or 0 (zero) if IN is not a valid positive BCD value.

Truth Table

IN	Q
-2	0 (invalid)
0	0
16 (16#10)	10
15 (16#0F)	0 (invalid)

Remarks

The input must:
- be positive.
- represent a valid BCD value.

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 input must be loaded in the current result before calling the function.

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
     BCD_TO_BIN
     ST         Q

ST Language

Q := BCD_TO_BIN (IN);