ResetBit

Resets a single bit in an Integer tag to 0.

Function Group Execution Windows Embedded Thin Client
ResetBit Arithmetic Synchronous Supported Supported Supported

Syntax

ResetBit( tagName, numBitNumber )
tagName
The name of an Integer tag where the bit value will be reset.
Note: To directly specify the name of a tag, rather than take the value of the tag, you must enclose the tag name in double-quotes. For example, ResetBit( "Second", 1 ).
numBitNumber
A numeric tag or value specifying the position (0…31) of the bit to reset.

Returned value

0 No error
1 Invalid parameter
2 Tag does not exist

Notes

You can use the Bit field to read/write values from specific bits in an integer tag. For example, enter Second->b0 to access the LSB (Least Significant Bit of the Second tag), and Second->b31 to access the MSB (Most Significant Bit of the Second tag).

Examples

Tag Name Expression
Tag ResetBit( "numSource", 4 ) // If the tag numSource held a value of 16, then the function returns 0 and numSource holds a new value of 0.
Tag ResetBit( "numSource", 1 ) // If the tag numSource held the value 19, then the function returns 0 and numSource holds a new value of 17.