The VarType column defines the object data type. The context menu shows which variable types can be assigned to an object. During project compilation, a check is made whether the variable type (UserVar) matches the object data type.
Note!
Not all objects support all data types.
The manual assignment of variables or data types not supported by the object may cause runtime errors.
The following basic data types are supported:
Type |
Bits |
Min |
Max |
Text constant |
Comment |
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BOOL |
8 |
false = 0 |
true <> 0 |
|
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BYTE USINT |
8 |
0 |
255 |
decimal |
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SINT |
8 |
-128 |
127 |
decimal |
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WORD UINT |
16 |
0 |
65535 |
decimal |
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INT |
16 |
-32768 |
32767 |
decimal |
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DWORD UDINT |
32 |
0 |
4294967295 |
decimal |
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DINT |
32 |
-2147483648 |
2147483647 |
decimal |
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REAL |
32 |
-3.402823466e+38 |
3.402823466e+38 |
Floating point number (decimal) |
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DT |
32 |
0 DT#01d01m1970Y00H00M00S |
4294967295 DT#07d02m2106Y06H28M15S |
Example: DT#18d08m2011Y17H15M35S => 16 Aug. 2011 17:15:35 |
|
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DATE |
32 |
0 DT#01d01m1970Y00H00M00S |
4294944000 DT#07d07m2106Y |
Example: D#18d08m2011Y => 16 Aug. 2011 |
|
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TIME |
32 |
0 T#0h0m0s0ms |
4294967295 T#1193h2m47s295ms |
decimal T#<hour>h<minutes>m<seconds>s<milliseconds>ms |
Resolution in milliseconds Complies with IEC 61131-3 |
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LWORD |
64 |
0 |
18446744073709551615 |
decimal |
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LINT |
64 |
-9223372036854775808 |
9223372036854775807 |
decimal |
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LREAL |
64 |
-1.7976931348623158e+308 |
1.7976931348623158e+308 |
decimal with comma |
These data types may possibly not correspond to the identically named data types of the data source. In this case, a conversion is carried out by means of the communication driver which may lead to a loss in accuracy.
The following data types are integer data types:
| • | BYTE |
| • | USINT |
| • | SINT |
| • | WORD |
| • | UINT |
| • | INT |
| • | DWORD |
| • | UDINT |
| • | DINT |
| • | LWORD |
| • | LINT |
The following data types are numerical data types:
| • | All integer data types |
| • | REAL |
| • | LREAL |
Strings
Type |
Bits of basic type |
Comment |
STRING |
8 |
|
WSTRING |
16 |
UTF16 LE |
Strings have a default length of 80 characters. If a different length is required, this must be specified with a colon separator. STRING:30.
Arrays
Type |
IEC |
Comment |
INT[<Dimension>] |
ARRAY [0..<Dimension>] OF INT |
|
WORD[<Dimension>] |
ARRAY [0..<Dimension>] OF WORD |
|
DWORD[<Dimension>] |
ARRAY [0..<Dimension>] OF DWORD |
Start index: 0
End index: <Dimension> -1