| 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. | 
| Description | Performs a bitwise negation on the operand connected to IN1. | 
| Notes | 
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. | 
| Parameters | Input  IN1 
Output
 
| Data type: | ANY_(SAFE)BIT |  
| Description: | Input value. |   OUT 
 
| Data type: | ANY_(SAFE)BIT |  
| Description: | Output value. |  | 
| 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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