Chapter 6 ASCII serial port instructions
116 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
AHL sets or resets the RS-232 Request to Send (RTS) handshake control lines for
your modem.
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.
AHLInput Input AHLI Set or reset the RTS control line for the modem.
See AHLI data type on page 129.
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.
ChannelSts Output WORD Displays the current status (0000 to 001F) of the handshake lines for the channel specified.
See AHL ChannelSts data type on page 128.
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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