Inputs
IN1 : BOOL First Boolean input
IN2 : BOOL Second Boolean input
Outputs
Q : BOOL Exclusive OR of all inputs
Truth table
| IN1 | IN2 | Q |
|---|---|---|
|
0 |
0 |
0 |
|
0 |
1 |
1 |
|
1 |
0 |
1 |
|
1 |
1 |
0 |
Remarks
The block is called "=1" in FBD
"Function block diagram"
A function block diagram describes a function between input variables and output variables. A function is described as a set of elementary blocks and FFLD languages. In IL "Instruction list"
This is a low-level language and resembles assembly
language, the XOR instruction performs an exclusive OR between the current
result and the operand. The current result must be Boolean. The XORN instruction
performs an exclusive between the current result and the Boolean negation of the
operand.
ST Language
Q := IN1 XOR IN2;
Q := IN1 XOR IN2 XOR IN3;
FBD Language
FFLD Language
(* First input is the rung. The rung is the output *)
IL Language
Op1: FFLD IN1
XOR IN2
ST Q (* Q is equal to: IN1 XOR IN2 *)
Op2: FFLD IN1
XORN IN2
ST Q (* Q is equal to: IN1 XOR (NOT IN2) *)
See also
