Ascii Server To Knx; Specific Introduction; Functionality - HMS Networks Intesis IN701-KNX Series User Manual

ASCII Server to KNX

IN701-KNX Series
8. ASCII Server to KNX

8.1. Specific Introduction

This section describes the integration of KNX installations into ASCII serial (EIA-232 or EIA-485) or ASCII IP
compatible devices and systems using the ASCII Server to KNX application of the Intesis gateway.
This integration aims to make KNX system signals and resources accessible from any programmable system
capable of reading/writing simple text messages through EIA-232 or EIA-485 serial port or Ethernet TCP/IP port
(for example, Extron, LiteTouch systems).
In its KNX interface, the Intesis gateway acts as a KNX device, reading/writing points from other KNX devices and
offering these points' values through its ASCII interface using simple ASCII messages.
The gateway configuration is carried out through the configuration tool.
Figure 5. Integration of KNX devices into ASCII IP or ASCII serial control and monitoring systems

8.2. Functionality

From the KNX system point of view, after starting the gateway or performing a KNX bus reset, the Intesis gateway
polls the KNX signals and stores the received values in its memory, ready to be served to the ASCII system when
requested. It also listens for any KNX telegram related to its configured internal points and acts accordingly to the
configuration of the related point.
From the ASCII system point of view, after starting it, the gateway listens for any read or write request, serves any
read request, or performs any writing request of its internal points received from the ASCII system. The values
received from ASCII become available to be read by the KNX system and vice versa.
In the gateway, each ASCII point is associated with a KNX group address, so the KNX system sees the whole ASCII
system as if it was one more KNX device, with the same configuration and operation characteristics.
When an ASCII point changes, the gateway sends a write telegram to the associated group address in the KNX
bus.
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