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Type
| FunctionAvailable as standard (non-safety-related) and safety-related type (*_S). For the safety-related type, the safety-related data types (SAFE*) are expected at the formal parameters. |
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Description
| Performs a logical XOR operation (exclusive OR) on the operands connected to IN1 and IN2. The output is TRUE if the inputs are not equivalent.Truth table for the XOR function:
| IN1 | IN2 | 1 | OUT |
| FALSE | FALSE | 1 | FALSE |
| FALSE | TRUE | 1 | TRUE |
| TRUE | FALSE | 1 | TRUE |
| TRUE | TRUE | 1 | FALSE |
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Notes
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- Further inputs can be added.
- All parameters can be negated.Note: The negation of formal parameters is not supported in safety-related code (SNOLD).
- The function provides implicit data type conversion at its input and output parameters according to the rules defined by the IEC 61131 standard.
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Parameters
| Inputs
 IN1
| Data type: | ANY_(SAFE)BIT |
| Description: | First input value. |
IN2
| Data type: | ANY_(SAFE)BIT |
| Description: | Second input value. |
Output
OUT
| Data type: | ANY_(SAFE)BIT |
| Description: | Output value. |
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Additional information
| EN/ENO behavior
The POU is only executed if TRUE is applied to the EN input. If EN = FALSE, the POU is not executed and ENO = FALSE indicates the inactivity.
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