Functionality; Gateway's Capacity - HMS Networks Intesis User Manual

Modbus Server – BACnet Client
TM
Intesis

Functionality

From the BACnet system point of view, after the start up process, Intesis subscribes to configured BACnet points or
reads them continuously from their respective BACnet server devices and updates in its memory the value of the
present_value property received from them.
From the Modbus system point of view, after the start up process, the gateway presents its points as Modbus
Registers, to be read or written by a Modbus client/master device using standard Modbus functions. The values
received from Modbus are immediately written in the associated present_value property of the corresponding object.
Each BACnet object from the BACnet server devices is associated to a Modbus register, with this, all the configured
points of the BACnet server devices are seen as a single Modbus server with many registers from the Modbus system
point of view, each register corresponding to a present_value of an object on a particular BACnet server device.
When a new value is read from BACnet for a given object/present_value, the new value is updated in the gateway's
memory and made accessible at Modbus Server interface.
In the continuous polling of the BACnet server, if an unresponsive BACnet server device is detected, the
corresponding virtual signal inside Intesis will be activated indicating communication error with the BACnet server
device. These virtual signals indicating communication status in real time with the BACnet devices are also accessible
from Modbus, like the rest of the points of the gateway.

Gateway's capacity

Intesis capacity is listed below:
Element
Type of BACnet
devices
Number of BACnet
devices
Number of Modbus
Registers
Modbus link layers
supported
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
100 250 600
version version version
IP / MSTP
256
100 250 600
Modbus RTU (EIA485)
Modbus TCP
1200 3000
Notes
version version
Communication with BACnet IP
and MSTP
Maximum number of different
BACnet devices the Intesis can
communicate to
Maximum number of points that
can be defined in the virtual
1200 3000
Modbus Server device inside the
gateway
Those supporting Modbus
protocol. Communication over
TCP/IP and RTU
User Manual r1.3 EN
URL https://www.intesis.com
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