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User Manual PROFIBUS Master / MQTT
Document code: MN67950_ENG Revision 1.000 Page 15 of 36
Figure 3b: “Set Communication  PROFIBUS
Master” window
Figure 3c: “Set Communication  MQTT” window
PROFIBUS M
ASTER
:
This section is used to define the main parameters of PROFIBUS line. The means of
the fields are:
The meanings of the fields for PROFIBUS Master are:
In the field “ ID Device ” the ID for the PROFIBUS side is defined;
In the field “ Baudrate ” the data rate of PROFIBUS is defined.
MQTT:
This section is used to define the main parameters of MQTT line. The means of the
fields are:
In the field “ Server URL ” the URL or the IP Address of the MQTT Server is
defined;
In the field “ Server Port ” the port used for MQTT communication is defined;
In the field “ Client ID ” the Client ID of the converter is defined (if ned);
In the field “ Keep Alive (seconds) ” the delay with which the Keep Alive
message is sent on MQTT is defined;
If the field “ Clean Session ” is checked, the last MQTT messages are deleted
by the Server and the Client in case of missing ACK. If unchecked, the
Server and the Client hold the last MQTT messages and, in case of incorrect
disconnection or missing ACK, they try to send again them since all the ACK
messages are exchanged correctly (valid only for QoS 1 and QoS 2);
If the field “ Will Flag ” is checked, the converter will publish the Will topic at
the connection to the Server. With this feature, in case of incorrect
disconnection, the Server will publish this topic to all the MQTT Clients that
subscribed it;
In the field “ Topic Name Will ” the topic used for Will message is defined;
In the field “ Message Will ” the payload of the Will message is defined;
In the field “ Retained Will ” the converter will send the Will message with Retain flag enabled. In this way, the Server will hold the
last Will message;
In the field “ QoS Will ” the QoS type for Will message is defined;