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Appendix
A.1 Overview of datatypes
Getting Connected to MindSphere
78
Getting Started, 05/2018
Format
The DT (DATE_AND_TIME) datatype saves the information on date and time of day in BCD
format.
The following table shows the properties of datatype DT:
Length (bytes) Format Range of values Example of value input
8 Date and time
(year-month-day
A.1.2 Overview of OPC UA datatypes
OPC UA Data Access Specification does not specify a certain representation for OPC UA
Addresses (NodeId). A NodeId is represented by a combination of:
● NamespaceIndex
● IdentifierType
● Identifier
OPC UA Client Driver addresses have the following syntax: ns=;=.
For more information refer to the table below:
Field Description
NamespaceIndex The index of the OPC UA Server namespace in which the address resides. If the index is 0, the
entire ns=;= clause is omitted.
IdentifierType The type of address. OPC UA supports the following four address types:
i
A numeric address represented with 32-bit unsigned integer
s A string address containing characters that can be encoded using UTF-8
g A GUID address in the format of XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
b An opaque address (such as a byte string)
Identifier The address that is formatted as a string. This address may be numeric, string, GUID, or opaque.