Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 480)

L-force | PLC Designer
IEC Operators and additional norm extending functions
478 DMS 3.2 EN 02/2011 TD29

Example in ST:
Var1:=MUX(0,30,40,50,60,70,80); (* Result is 30 *);
Note!
Note that an expression occurring ahead of an input other than INK will not be
processed to save run time ! Only in simulation mode all expressions will be
executed.
9.6 Comparison Operators...
9.6.1 GT
PLC Designer IEC operator: Greater than
A Boolean operator which returns the value TRUE when the value of the first operand
is greater than that of the second. The operands can be BOOL, BYTE, WORD, DWORD,
SINT, USINT, INT, UINT, DINT, UDINT, REAL, LREAL, TIME, DATE, TIME_OF_DAY,
DATE_AND_TIME and STRING.
Example in IL:
LD 20
GT 30
ST Var1 (* Result is FALSE *)
Example in ST:
VAR1 := 20 > 30 > 40 > 50 > 60 > 70;
Example in FBD: