Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 518)

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Data types in PLC Designer
516 DMS 3.2 EN 02/2011 TD29
11 Data types in PLC Designer
11.1 Standard data types
11.1.1 Data types
You can use standard data types and user-defined data types when programming.
Each identifier is assigned to a data type which dictates how much memory space will
be reserved and what type of values it stores.
11.1.2 BOOL
BOOL type variables may be given the values TRUE and FALSE. 8 bits of memory space
will be reserved.
see also chapter Operands in CoDeSys, BOOL constants
11.1.3 Integer Data Types
BYTE, WORD, DWORD, SINT, USINT, INT, UINT, DINT, and UDINT are all integer data
types
Each of the different number types covers a different range of values. The following
range limitations apply to the integer data types:
Type Lower limit Upper limit Memory space
BYTE 0 255 8 Bit
WORD 0 65535 16 Bit
DWORD 0 4294967295 32 Bit
SINT: -128 127 8 Bit
USINT: 0 255 8 Bit
INT: -32768 32767 16 Bit
UINT: 0 65535 16 Bit
DINT: -2147483648 2147483647 32 Bit
UDINT: 0 4294967295 32 Bit
As a result when larger types are converted to smaller types, information may be lost.
see also chapter Operands in CoDeSys, Number constants