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Product Description
3.1
General
The Anybus Modbus to KNX Gateway is intended for integration of Modbus RTU and Modbus
TCP installations into KNX monitoring and control systems.
On the KNX side the gateway acts as a KNX device, and on the Modbus side it emulates a
Modbus RTU Master device and/or a Modbus TCP Client device. The Modbus slave device(s) are
read by the gateway using automatic continuous polling.
Configuration is carried out using Anybus Configuration Manager (MAPS) which can be
downloaded from
3.2
Operation
After the startup process has completed, the gateway will continuously read data points from
the connected Modbus TCP Server and/or Modbus RTU Slave devices and update these values in
its memory.
From the KNX system point of view, the whole Modbus system is seen as a single KNX device
with the same configuration and operation characteristics as other KNX devices. Every register in
the Modbus slave devices will be associated with a specific KNX
group address
. When a new
value is read from Modbus for a given register, a write telegram is sent to the associated KNX
group. When a telegram is received from the KNX bus, a message is sent to the associated
Modbus device to perform the corresponding action.
If a device is not responding during the continuous polling of Modbus devices, a virtual signal
inside the gateway will be activated indicating a communication error with the device. These
virtual signals indicating real-time communication status are accessible from KNX in the same
way as the other data points.
Modbus to KNX Gateway User Manual
SCM-1202-050 1.2 en-US
