ASCII serial port instructions Chapter 6
Rockwell Automation Publication 2080-RM001D-EN-E - February 2015 125
AWT writes characters from a source string to an external device.
Arguments
Parameter
Parameter
type
Data type Description
IN Input BOOL If Rising Edge (IN turns from FALSE to TRUE), start the function block with the
precondition that the last operation has been completed.
AWTInput Input AWAAWT The channel and length to be operated.
See AWAAWT data type on page 130.
Source Input ASCIILOCADDR The source string: char array.
Q Output BOOL Outputs of this instruction are updated asynchronously from the program scan. Output
Q cannot be used to re-trigger the instruction since IN is edge triggered.
FALSE - The function block is not done.
TRUE - The function block is done.
NumChar Output UINT Indicates the number of characters transmitted. Updates when the transmission is
complete and Q is TRUE. NumChar may be less than the Length requested to be
transmitted if the length of the Source String is shorter than the requested Length.
Error Output BOOL FALSE - No error.
TRUE - An error is detected.
ErrorID Output UINT See ABL error codes on page 127.
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