Belden La 0980 LSL 3010-121-0006-001, Manual, Page: 94 / 150

10.1 MQTT 10 IIoT functionality
10.1.2 MQTT topics
MQTT mainly relates to topics. All messages are attached to a topic which
adds context to the message itself. Topics may consist of any string and they
are allowed to contain slashes
(/)
as well as wildcard symbols
(*, #)
.
10.1.2.1 Base topic
For LioN-X and the LioN-Xlight variants there is a configurable Base topic
which is the prefix for all topics. The Base topic can be chosen freely by the
user. The Base topic can also contain selected variables as shown in Table
12: Base topic variables on page 94.
Variables in the Base topic have to be written in brackets ("[ ]"). The following
variables are possible:
Variable Description
mac The MAC address of the device
name The name of the device
order The ordering number of the device
serial The serial number of the device
Table 12: Base topic variables
Example:
The
Base topic
"io_[mac]"
translates to
"io_A3B6F3F0F2F1"
.
All data is organized in domains. The domain name is the first level in the
topic after the
Base topic
. Note the following notation:
Base-Topic/domain/.….
Manual EtherCAT®
Version 1.1 04/2021
94