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User Manual
Modbus TCP Master / MQTT
Document code: MN67935_ENG Revision 1.001 Page 17 of 37
Figure 3b: “Set Communication
Working Mode” window
Figure 3c: “Set Communication
Modbus TCP
Master” window
W
ORKING
M
ODE
:
This section is used to define the working mode of MQTT side of the converter. It is
possible to define:
Synchronous
: it is possible to read/write the Modbus TCP slaves
instantaneously, using a specific MQTT payload.
Asynchronous
: Modbus and MQTT are decoupled. The converter manages
by itself the Modbus TCP polling.
M
ODBUS
TCP
M
ASTER
:
This section is used to define the main parameters of Modbus TCP line. The means
of the fields are:
In the field “
IP Address
” the IP address of the converter is defined;
In the field “
SubNet
Mask
” the Subnet Mask of the converter is defined;
In the field “
Gateway
” the default gateway of the net is defined. This
feature can be enabled or disabled pressing the Check Box field. This feature
is used for going out of the net;
In the field “
TimeOut (ms)
” the maximum time that the converter attends
for the answer from the Slave interrogated is defined;
In the field “
Cyclic Delay (ms)
” the delay (idle time) between two Modbus
requests is defined.
