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Organizing Data
4-3
Data types
:KHQ\RXGHYHORSDSURMHFWWKHFRQWUROOHUSURYLGHVDVHWRI
SUHGHILQHGGDWDW\SHV
predefined data types
7KHFRQWUROOHUGDWDW\SHVIROORZWKH,(&GHILQHGGDWDW\SHV
7KHSUHGHILQHGDWRPLFGDWDW\SHVDUH
Data type:
Description:
Range:
BOOL
1-bit boolean
SINT
INT
DINT
REAL
1-byte integer
2-byte integer
4-byte integer
4-byte floating-point number
0 = off
1 = on
-128 to 127
-32,768 to 32,767
-2,147,483,648 to 2,147,483,647
-3.402823E38 to -1.1754944E−38 (negative values)
and
0
and
1.1754944E−38 to 3.402823E38 (positive values)
7KH5($/GDWDW\SHDOVRVWRUHV“LQILQLW\DQG“1$1EXWWKHVRIWZDUH
GLVSOD\GLIIHUVEDVHGRQWKHGLVSOD\IRUPDW
Display Format:
Equivalent:
Real
+infinite
- infinite
+NAN
-NAN
+infinite
- infinite
+NAN
-NAN
Exponential
1.$
-1.$
1.#QNAN
-1.#QNAN
1.#INF000e+000
-1.#INF000e+000
1.#QNAN00e+000
-1.#QNAN00e+000
1756-6.5.12 March 1999