Siemens SIMATIC S7-1500 Function Manual page 144

Example
A tag has the SIMATIC data type "COUNTER". You read COUNTER → UInt16 in the table.
You now know that you do not need to convert; the COUNTER value is sent over the line as
a UInt16 data type.
The client detects from the attribute "DataType" that the tag is actually the SIMATIC data
type "COUNTER". With this knowledge, the client reconstructs the data type.
Table 9- 1
SIMATIC data type
BOOL
BYTE
WORD
DWORD
LWORD
SINT
INT
DINT
LINT
USINT
UINT
UDINT
ULINT
REAL
LREAL
S5TIME
TIME
LTIME
DATE
TIME_OF_DAY (TOD)
LTIME_OF_DAY (LTOD)
DATE_AND_TIME (DT)
LDT
Communication
Function Manual, 11/2019, A5E03735815-AH
SIMATIC and OPC UA data types
OPC UA communication
9.1 What you need to know about OPC UA
OPC UA data type
Boolean
BYTE
→ Byte
WORD
→ UInt16
DWORD
→ UInt32
LWORD
→ UInt64
SByte
Int16
Int32
Int64
Byte
UInt16
UInt32
UInt64
Float
Double
S5TIME
→ UInt16
TIME
→ Int32
LTIME
→ Int64
DATE
→ UInt16
TOD
→ UInt32
LTOD
→ UInt64
DT
→ Byte[8]
DateTime
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