General overview - Basic Documentation - RMK770-1

Communication via the KNX bus

Product Family
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Air conditioning controller
Content Language
Content Type
Basic Documentation
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About this document

This document contains:

  • Section 1 Introductory information about Synco and the KNX network

  • Section 2 Engineering notes

  • Section 3 Commissioning notes

  • Sections 4 to 7 Device address, device name and addressing via ACS, special features of KNX addressing and communication in LTE-Mode.

  • Section 8 Designing "large plants"

  • Section 9 Appendix with general, supplementary information

KNX Association

The KNX Association is headquartered in Brussels and is an organization or association of manufacturers which maintains and further develops the KNX standard. The KNX Association supports the trend towards intelligent buildings, in which the various building services including lighting and security systems all communicate on the same network.

Aims and objectives of the KNX Association:

  • Determine the range of functions for the devices installed in the network.

  • Promote interaction between products from a wide range of manufacturers

  • Certify products that comply with KNX standards.

  • Simplify commissioning of devices in KNX networks.

  • Open the KNX bus to communications providers and utilities companies.

  • Exploit various transfer media: Bus (TP1), wireless (RF) and power line (PL).

KNX and Synco

The Synco devices are designed for HVAC applications and individual room control. They are used in:

  • Residential buildings

  • Business and administrative buildings

  • Shopping malls and commercial buildings

  • Schools and training centers

  • Hotels and fitness, leisure and wellness centers

The KNX bus enables the Synco devices to communicate with each other, i.e. to exchange process values and system data in LTE-Mode. Typical values and data:

  • Outside air temperature to devices in the same "outside air temperature zone"
    and room temperature to devices in the same "geographical zone" (multiple use of sensor values).

  • Heating and refrigeration demand signals from zone controllers to the devices in the low-temperature hot water and chilled water generation partial plants.

  • DHW priority signals (e.g. while charging the DHW tank).

  • Time synchronization (the time master synchronizes the time slaves).

  • Remote indication of fault and error messages (e.g. sensor error).