Rockwell Automation Logix5000 Controllers Structured Text Programming Manual - Manual (Page 38)

38 Publication 1756-PM007D-EN-P - November 2012
Chapter 1 Program Structured Text
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);