Lenze PLC Designer PLC Designer (R2-x) Manuel d'utilisateur télécharger pdf (Page 481)

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IEC Operators and additional norm extending functions

 DMS 3.2 EN 02/2011 TD29 479

PLC Designer IEC operator: Less than

A Boolean operator that returns the value TRUE when the value of the first operand is

less 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:

ST Var1 (* Result is TRUE *)

Example in ST:

VAR1 := 20 < 30;

Example in FBD:

PLC Designer IEC operator: Less than or equal to

A Boolean operator that returns the value TRUE when the value of the first operand is

less than or equal to 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:

ST Var1 (* Result is TRUE *)

Example in ST:

VAR1 := 20 <= 30;

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Lenze PLC Designer PLC Designer (R2-x) Manuel d'utilisateur Page 481