Allen-Bradley Logix5000

Rockwell Automation Publication 1756-RM003N-EN-P - October 2011 483
Program Control Instructions (JMP, LBL, JSR, RET, SBR, JXR, TND, MCR, UID, UIE, AFI, NOP, EOT, SFP, SFR, EVENT) Chapter 11
Structured Text
Program A
Program B
IF Shut_Down_Line AND NOT Shut_Down_Line_One_Shot THEN
EVENT (Shut_Down);
END_IF;
Shut_Down_Line_One_Shot := Shut_Down_Line;
IF Shut_Down_Line AND NOT Shut_Down_Line_One_Shot THEN
EVENT (Shut_Down);
END_IF;
Shut_Down_Line_One_Shot := Shut_Down_Line;