580 Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Chapter 17 ASCII Serial Port Instructions (ABL, ACB, ACL, AHL, ARD, ARL, AWA, AWT)
Example: Continuously test the buffer for the termination characters.
Relay Ladder
Structured Text
ABL(0,MV_line);
/
MV_line.EN
EN
DN
ER
ASCII Test For Buffer Line
Channel 0
SerialPort Control MV_line
Character Count 0
ABL
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