View single post by slychiu
 Posted: Friday Dec 30th, 2016 06:51 am
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slychiu



Joined: Saturday Apr 29th, 2006
Location: Singapore
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The Cbus to KNX translator was not designed to support the HVAC and Ventilation Applications. You will not be able to make these work using Custom applications

It does support Custom applications. However using Invalid or reserved application numbers like 70 and 71 may cause problems in CBUS not related to this product

Custom applications must be able to map to the supported KNX Address Types On/Off, Relative DIM, Floating Point, Scaling. If they cannot be mapped then it will not work

As the manual explains about Floatng point and Scaling KNX types
  • On/Off  means a 1-bit KNX telegram corresponding to a CBUS On/Off message.
  • RelativeDim means a 4-bit KNX telegram which corresponds to a CBUS Relative Dimming command.
  • Time means a Time KNX telegram corresponding to a CBUS Time message.
  • Date means a Date KNX telegram corresponding to a CBUS Date message.
  • Floatiing Point means a KNX Floating Point telegram. The incoming CBUS message has its object value converted to a floating point (“EIS 5”)  2-byte  telegram.
  • Scaling means a the CBUS object value is sent as a KNX 1-byte (“EIS 6”) telegram. For example CBUS Lighting application ON value is transmitted to the KNX mapped group address as a 1 byte value of 255, and CBUS Off signal is translated to a 1-byte telegram value of 0
The point is that Cbus objects/commands can be converted to Floating point and scaling KNX objects if required
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