Product manual

TAC Xenta Server – Gateway, Technical Manual 4 Configuring Modbus Communication
Schneider Electric Buildings AB, June 2011 35 (184)
04-00124-06-en
4 Configuring Modbus Communication
The Xenta 913 can exchange data with devices on different networks.
A gateway application within the Xenta 913 enables exchange of data
between devices on the different networks. For example, by using the
serial interfaces RS-232 or RS-485, the Xenta 913 can be configured for
communicating using a serial protocol such as Modbus. Data from the
Modbus device can then be sent to a LonWork device and vice versa.
The signals that are to be exchanged between the Xenta 913 and the
remotely controlled device are specified using TAC Device Editor. This
is included in the XBuilder installation and creates template files that
represent the device. These files are then used in the XBuilder project.
A new folder is installed together with the device editor, and is located
at C:\Program files\TAC\Device Library. The folder is for storing tem-
plate files created by the device editor for various devices.
In the following example, a PM710 energy meter is connected to the
Xenta 913 (to the RS-485 A serial port) so that the energy usage can be
inspected. For more information about the devices, see Chapter 2,
“Planning the Project”, on page 19.
The PM710 energy meter is controlled remotely by using the Modbus
protocol. The Xenta 913 is configured as a Modbus master which means
that the Xenta 913 requests data from the energy meter. The meter acts
as a Modbus slave, which means that it sends the required data to the
master at the request of the master.
For more information about configuring serial communication, see
Chapter 11, “Configuring Serial or Ethernet Communication”, on
page 91.