Native Data Types
Bitstring Types
BOOL
, BYTE
, WORD
, DWORD
, LWORD
Bitstring types of 1, 8, 16, 32 and 64 bit. Implicit conversion from left to right using zero extension.
Unsigned Integer Types
USINT
, UINT
, UDINT
, ULINT
Unsigned integer types of 8, 16, 32 and 64 bit. Implicit conversion from left to right preserving the value.
Signed Integer Types
SINT
, INT
, DINT
, LINT
Signed integer types of 8, 16, 32 and 64 bit. Implicit conversion from left to right preserving the value. An unsigned type of n
bit is also implicitly converted to a signed type of m
bit where the relation m > n
must hold. There is no implicit conversion between bitstring types and integer types.
Floating Point Types
REAL, LREAL
Floating point data types of 32 and 64 bit. Implicit conversion from left to right preserving the value.
String Types
string[<length>]
wstring[<length>]
1-byte and 2-byte strings of given length
. If length
is omitted, it has 255
as default value.
Character Types
char
wchar
Single 1-byte and 2-byte character of a string. It can be implicitly converted to a string.
Time-Related Types
TIME
, LTIME
DATE
, LDATE
TIME_OF_DAY
, TOD
, LTIME_OF_DAY
, LTOD
DATE_AND_TIME
, DT
, LDATE_AND_TIME
, LDT
Datatypes for duration, date and time. Internally, all values of these types are represented with a granularity of 1 nanosecond. Values of date-related types represent the number of nanoseconds since 1.1.1970
(UTC). Leapseconds are ignored. Implicit conversion is allowed from a non-L
type to an L
type, e.g. from TIME
to LTIME
.