Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 464)

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

Example in FBD:
9.2.3 SUB
PLC Designer IEC operator: Subtraction of one variable from another of the types:
BYTE, WORD, DWORD, SINT, USINT, INT, UINT, DINT, UDINT, REAL and LREAL.
A TIME variable may also be subtracted from another TIME variable resulting in third
TIME type variable. Note that negative TIME values are undefined.
Example in IL:
LD 7
SUB 2
ST Var1
Example in ST:
var1 := 7-2;
Example in FBD: