Siemens SIMATIC RF650R Configuration Manual page 186

Programming via XML interface
10.1 Functionality of the XML interface
Some commands (e.g. "setConfiguration" or "readTagIds") can take longer than 5 seconds.
These commands already include information to this effect.
Note
Saving and working through the commands
It is also possible to send several commands without waiting for the replies. The reader
works through the commands in the precise order in which they were received. Note that the
reader discards newly arriving commands if internally there are already approximately 100
commands waiting for execution.
Asynchronous notifications (XML reports)
Apart from the synchronous command/reply frames, asynchronous notifications are also
transferred. These reports are generated by the reader and may require confirmation of
receipt by the user application. Each transfer includes a unique ID (<id>) generated by the
reader. In contrast to the IDs of the commands, this ID is generated by the reader itself. The
user application can only acknowledge this notification with the same ID.
The reports are divided into events and alarm messages. An event contains data acquired
by the reader itself. Alarm messages inform the user application of irregular or incorrect
operating conditions of the reader.
The reports can be transferred reliably or without verification.
● In the non-reliable mode, all reports are sent to the user application without waiting for
confirmation of receipt. The report is automatically discarded if the connection to the user
application does not exist or is interrupted.
● In the reliable mode, the receipt of every report must be confirmed by the user application
with a reply frame ("tagEventReport"). If no confirmation of receipt is received within
approximately 10 seconds, the reader sends the report to the user application again.
If there are connection errors or interruptions, the reports are stored on the reader until
the connection is re-established. If the reader is turned off, however, the stored reports
are lost. Activate reliable transfer if the connection between the reader and PC is not
stable, for example due to a WLAN connection.
You will find further information on the structure of the reply frames in the section
"tagEventReport (Page 266)".
The reader can buffer a maximum of 10 000 reports. If this number is exceeded, newly
generated reports are discarded internally.
You enable reliable transfer using the WBM ("The "Settings - Communication" menu item
(Page 74)").
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SIMATIC RF650R/RF680R/RF685R
Configuration Manual, 03/2018, C79000-G8976-C386-06