Chapter 6 ASCII serial port instructions
112 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
ACB determines the total characters in the buffer.
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.
ACBInput Input ABLACB The channel to be operated.
See ABLACB data type on page 127.
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.
Characters Output UINT The number of characters.
Error Output BOOL FALSE - No error.
TRUE - An error is detected.
ErrorID Output UINT See ABL error codes on page 127.
ACB function block language examples
Function Block Diagram (FBD)
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