1756-L7X Controllers - Allen-Bradley Logix5000 Reference Manual

ASCII Serial Port Instructions
(ABL, ACB, ACL, AHL, ARD, ARL, AWA, AWT)
Topic
ASCII Test For Buffer Line (ABL)
ASCII Chars in Buffer (ACB)
ASCII Clear Buffer (ACL)
ASCII Handshake Lines (AHL)
ASCII Read (ARD)
ASCII Read Line (ARL)
ASCII Write Append (AWA)
ASCII Write (AWT)
Use the ASCII serial port instructions to read and write ASCII characters
IMPORTANT
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Page
578
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To use the ASCII serial port instructions, you must configure the
serial port of the controller. For procedures, see the Logix5000
Controllers Common Procedures Programming Manual,
publication 1756-PM001.
The 1756-L7x controllers do not have a serial port and do not
use the ASCII Read/Write instructions. In addition, you cannot
redirect an ASCII Read/Write instruction to the USB port.
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