SET_BIT: Set bit

Function description

This function sets the bit of the OutputRegister output word selected with BitNumber to the value of InputData.

The BitNumber parameter provides the bit number in the output data.

WARNING

FORCED VALUES NOT TAKEN INTO ACCOUNT

This procedure overwrites the values in State memory WITHOUT regard to possible forced values in the reference data editor. This can produce serious process conditions.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

and can be configured as additional parameters.

Representation in FBD

Representation:

Representation in LD

Representation:

Representation in IL

Representation:

LD InputData
SET_BIT BitNumber
ST OutputRegister

Representation in ST

Representation:

OutputRegister := SET_BIT (InputData, BitNumber);

Parameter description

Description of input parameters:

Parameter	Data type	Description
InputData	BOOL	Input data
BitNumber	UINT	Bit number to be written.

Description of output parameters:

Parameter	Data type	Description
OutputRegister	WORD	Output

Runtime error

For a list of all block error codes and values, see Extension/Compatibility.

EN stands for ENable; it is an optional block input. When the EN input is enabled, an ENO output is set automatically.

If EN = 0, the block is not enabled; its internal program is not executed, and ENO is set to 0.

If EN = 1, the block's internal program is run and ENO is set to 1. If an error occurs, ENO is set to 0.

If the EN input is not connected, it is set automatically to 1.

ENO

ENO stands for Error NOtification; this is the output associated with the optional input EN.

If ENO is set to 0 (because EN = 0 or in case of an execution error):

the status of the function block outputs remains the same as it was during the previous scanning cycle that executed correctly;
the output(s) of the function, as well as the procedures, are set to "0".

WORD

The type WORD is encoded in a 16 bit format and is used to perform processing on series of bits.

This table shows the upper/lower limits of each of the bases that can be used:

Base	Lower limit	Upper limit
Hexadecimal	16#0	16#FFFF
Octal	8#0	8#177777
Binary	2#0	2#1111111111111111

Examples of representation

Data	Representation in one of the bases
0000000011010011	16#D3
1010101010101010	8#125252
0000000011010011	2#11010011