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Programming via OPC UA
9.1 Supported methods/functions
You will find more information on OPC UA on the pages of the "OPC Foundation
(https://opcfoundation.org/)". The "OPC Unified Architecture for AutoID Companion
Specification" can be obtained via the "AIM Germany (www.aim-d.de)".
All SIMATIC communication modules have implemented OPC UA servers with the range of
functions for RFID devices defined by "OPC Unified Architecture for AutoID" (Release 1.00).
For this, "OPC Unified Architecture for AutoID" defines the "AutoIdDevice" and, derived from
this, the "RfidReaderDevice". With the communication modules, each reader interface
stands for a read point and thus for an independent "AutoIdDevice" or "RfidReaderDevice".
Note that depending on the connected terminal device, not all methods/functions defined in
the "AutoIdDevice" can be used in a sensible manner (e.g. antenna power).
An XML device description file, for connection of the communication module via OPC UA, is
stored on the communication module and can be downloaded via the WBM ("System >
Device description file").
9.1
Supported methods/functions
Parallel to regular operation via a SIMATIC controller, you can read out the results of the
SIMATIC commands and diagnostic information via the Ethernet interface using OPC UA
and make them available to another application. Only read-only accesses are supported by
the communication modules via OPC UA. Note that all control or write accesses, as well as
calls of methods and setting of variables described in the following, are not supported.
Requirements
● The maximum five permitted OPC UA client connections are not dependent on the read
points. Note that multiple clients can also work with one read point.
● An OPC UA client that wishes to use the full RFID functionality of the readers connected
to a communication module needs to support the following fundamental OPC UA access
mechanisms:
– Data Access (DA)
– Events
– Methods
100
Operating Instructions, 12/2019, C79000-G8976-C578-01
SIMATIC RF166C
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