Siemens Simatic S7-400 - Multicomputing

Configuration and operation
4.5 Data types
CP 443-1 OPC UA
Operating Instructions, 01/2017, C79000-G8976-C427-02
41
Table 4- 1 Data types
Size [bit],
type
Area
Data type
Remark
Operand area of
the CPU
SIMATIC S7
IEC 61131-3
OPC UA
1 0 .. 255 BOOL BOOL Boolean 0 = false
1 .. 255 = true
I, Q, PI, PQ, M,
DB
Numbers
8, UInt8 0 .. 255 BYTE BYTE,
USINT
Byte I, Q, PI, PQ, M,
DB
8, UInt8 0 .. 255 CHAR CHAR Byte ASCII characters
32 .. 255
I, Q, PI, PQ, M,
DB
16, UInt16 0 .. 65535 WORD WORD,
UINT
UInt16 I, Q, PI, PQ, M,
DB
16, Int16 -32768 .. 32767 INT INT Int16 I, Q, PI, PQ, M,
DB
32, UInt32 0 .. 4294967295 DWORD DWORD,
UDINT
UInt32 I, Q, PI, PQ, M,
DB
32, Int32
2147483648 ..
2147483647
DINT DINT Int32 I, Q, PI, PQ, M,
DB
32, Float
±1.175 495e-38 ..
3.402823e+38
REAL REAL Float DB
Time and date
16, UInt16 0 .. 999 S5TIME TIME UInt16 SIMATIC time
For the coding see online
help of STEP 7.
DB
16, UInt16
D#1990-1-1 ..
D#2168-12-31
(0 .. 65378)
DATE DATE UInt16 IEC date [d] DB
32, UInt32
TOD#0:0:0.0 ..
TOD#23:59:59.999
(0 .. 86399999)
TIME_OF_
DAY
(TOD)
TIME_OF_
DAY
UInt32 Time of day [ms] DB
32, UInt32
-24D_20H_31M_
23S_648MS ..
T#24D_20H_31M_
23S_647MS
(-2147483648 ..
2147483647)
TIME TIME UInt32 IEC time [ms] DB
Complex data types
64
1990-1-1-0:0:0.0 ..
2089-12-31-
23:59:59.999
DATE_AND_
TIME
DT DATE_
AND_TIM
E
UInt32+
UInt32
Date and time of day
For the coding see online
help of STEP 7.
DB
254 * 8
STRING *
STRING
String
Max. 254 bytes user data
DB
ARRAY
*
Multidimensional field of
elementary or complex
data types
DB
UDT
*
User-defined data type
for specific parameter
groups
DB
* For the coding see below.