ResetBit
Resets a single bit in an Integer tag to 0.
| Function
| Group
| Execution
| Windows
| Embedded
| Thin Client
| Mobile Access
|
| ResetBit | Arithmetic
| Synchronous
| Supported
| Supported
| Supported
| Not 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.
|
ResetBit