Allen-Bradley 1756 ControlLogix - Rockwell Automation Publication MOTION-RM002 H-EN-P-February

Overview of Structured Text Programming
Chapter 11
Rockwell Automation Publication MOTION-RM002H-EN-P-February 2018 661
For example:
Format Example
//comment
At the beginning of a line
//Check conveyor belt direction
IF conveyor_direction THEN...
At the end of a line
ELSE //If conveyor isn’t moving, set alarm light
light := 1;
END_IF;
(*comment*) Sugar.Inlet[:=]1;(*open the inlet*)
IF Sugar.Low (*low level LS*)& Sugar.High (*high level LS*)THEN...
(*Controls the speed of the recirculation pump. The speed depends on the temperature in the tank.*)
IF tank.temp > 200 THEN...
/*comment*/ Sugar.Inlet:=0;/*close the inlet*/
IF bar_code=65 /*A*/ THEN...
/*Gets the number of elements in the Inventory array and stores the value in the Inventory_Items tag*/
SIZE(Inventory,0,Inventory_Items);