GetBit
GetBit is a built-in scripting function that gets the value of a single bit in a numeric value.
| Function | Group | Execution | Windows | Embedded | Thin Client | Mobile Access |
|---|---|---|---|---|---|---|
| GetBit | Arithmetic | Synchronous | Supported | Supported | Supported | Not supported |
Syntax
GetBit( tagName, numBitNumber )
- tagName
- The name of an Integer tag from which the bit value will be gotten.
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, GetBit( “Second”, 1 ).
- numBitNumber
- A numeric tag or value specifying the position (0…31) of the bit to get.
Returned value
Returns the value ( 0 or 1 ) of the specified bit.
Notes
You also 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 | GetBit( “numSource”, 4 ) // If the tag numSource holds a value of 15, then this function returns 0. |
| Tag | GetBit( “numSource”, 1 ) // If the tag numSource holds a value of 19, then this function returns 1. |