ADF Web HD67938-IP-B2, User Manual

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User Manual BACnet Slave / MQTT
Document code: MN67938_ENG Revision 1.000 Page 24 of 34
Figure 4a: “Set MQTT Topics  MQTT Publish” window
MQTT SET TOPIC:
By Pressing the “ MQTT Set Topic ” button from the main window for SW67938 (Fig. 2) the window “Set MQTT Topics” appears (Fig. 4).
This section is used to define the MQTT topics where the converter will publish the data from BACnet and the topic that the converter will
subscribes for writing the data to BACnet.
MQTT P
UBLISH
The means of the fields are:
In the field “ Topic ” the MQTT topic is defined;
If the field “ Retained ” is defined, the retained flag is enabled. The MQTT server will hold the last topic published;
In the field “ QoS ” the QoS level is defined;
In the field “ Data Type ” the type of data to use is defined;
In the field “ Dimension ” the dimension in byte of the data is defined;
In the field “ Position ” the starting byte of the internal memory array where taking the data is defined;
In the field “ Template ” the structure of the MQTT payload is defined. With a double click on it, it is possible to open a window for
editing it;
In the field “ Mnemonic ” a description of the topic is defined.