Siemens SIMATIC S7-400 Operating Instructions Manual page 41

Table 4- 1 Data types
Size [bit], Area
type
1 0 .. 255
Numbers
8, UInt8 0 .. 255
8, UInt8 0 .. 255
16, UInt16 0 .. 65535
16, Int16 -32768 .. 32767
32, UInt32 0 .. 4294967295
2147483648 ..
32, Int32
2147483647
±1.175 495e-38 ..
32, Float
3.402823e+38
Time and date
16, UInt16 0 .. 999
16, UInt16 D#1990-1-1 ..
D#2168-12-31
(0 .. 65378)
32, UInt32 TOD#0:0:0.0 ..
TOD#23:59:59.999
(0 .. 86399999)
32, UInt32 -24D_20H_31M_
23S_648MS ..
T#24D_20H_31M_
23S_647MS
(-2147483648 ..
2147483647)
Complex data types
1990-1-1-0:0:0.0 ..
64
2089-12-31-
23:59:59.999
254 * 8
* For the coding see below.
CP 443-1 OPC UA
Operating Instructions, 01/2017, C79000-G8976-C427-02
Data type
SIMATIC S7 IEC 61131-3 OPC UA
BOOL BOOL
BYTE BYTE,
USINT
CHAR CHAR
WORD WORD,
UINT
INT INT
DWORD DWORD,
UDINT
DINT DINT
REAL REAL
S5TIME TIME
DATE DATE
TIME_OF_ TIME_OF_
DAY DAY
(TOD)
TIME TIME
DATE_AND_ DT DATE_
TIME AND_TIM
E
STRING * STRING
ARRAY *
UDT *
Remark
Boolean 0 = false
1 .. 255 = true
Byte
Byte ASCII characters
32 .. 255
UInt16
Int16
UInt32
Int32
Float
UInt16 SIMATIC time
For the coding see online
help of STEP 7.
UInt16 IEC date [d]
UInt32 Time of day [ms]
UInt32 IEC time [ms]
UInt32+ Date and time of day
UInt32
For the coding see online
help of STEP 7.
String Max. 254 bytes user data DB
Multidimensional field of
elementary or complex
data types
User-defined data type
for specific parameter
groups
Configuration and operation
4.5 Data types
Operand area of
the CPU
I, Q, PI, PQ, M,
DB
I, Q, PI, PQ, M,
DB
I, Q, PI, PQ, M,
DB
I, Q, PI, PQ, M,
DB
I, Q, PI, PQ, M,
DB
I, Q, PI, PQ, M,
DB
I, Q, PI, PQ, M,
DB
DB
DB
DB
DB
DB
DB
DB
DB
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