Instructions

Intesis
TM
KNX – Modbus Master User Manual r1.0 eng
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This information is subject to change without notice
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Functionality
From the Modbus system point of view, after the start up process, Intesis reads continuously the points configured
to be read in the Modbus RTU Slave devices and updates in its memory all the values received from the Modbus
system.
Every one of the mentioned Modbus points is associated to a KNX group address, with this, all the Modbus system
is seen as one more KNX device from the KNX system point of view, with the same configuration and operation
characteristics.
When a change in any Modbus point occurs, a write telegram is sent to the KNX bus, of the associated KNX Group.
When a telegram is received from the KNX bus to the KNX Group address associated to a Modbus point, a message
is sent immediately to the corresponding Modbus device to perform the corresponding action.
In the continuous polling of the Modbus devices, if a non-response of the Modbus device is detected, the
corresponding virtual signal inside Intesis gateway will be activated indicating that there is a communication error
with the Modbus device. These virtual signals indicating communication status in real time with the Modbus devices
are also accessible from KNX, like the rest of the points of Intesis Gateway.
Gateway’s capacity
Intesis capacity is listed below:
Element
100
version
Notes
Number of
Communication
Objects
100
Maximum number of
Communication Objects that can
be defined.
Number of Main
Group Addresses
100
Maximum number of KNX Main
Group Addresses to be used
Number of
Associations
200
Maximum number of KNX
Association
Type of Modbus
slave devices
Modbus RTU (EIA485)
Those supporting Modbus
protocol.
Number of Modbus
Slave devices
Up to 255 Devices
Number of Modbus Slave
devices supported by the device