The ComBridge BACnet-Gateway is used as an interface between KNX and BACnet. The configured KNX communication objects are translated into BACnet objects and can thereby communicate KNX information into the BACnet world.
BACnet clients can either subscribe via a so-called COV subscription which means that they are automatically informed about KNX events or they can use the ReadProperty-Service to query the status of an object on an ad-hoc basis as and when required.
Up to 250 objects can be configured:
- 1 bit
- 1 Byte (0..100%)
- 1 Byte unsigned
- 1 Byte signed
- 2 Byte unsigned
- 2 Byte signed
- 2 Byte float
- 4 Byte unsigned
- 4 Byte signed
- 4 Byte float
The device is configured entirely with ETS which is one of the device’s most outstanding features. No special knowledge about BACnet is required for the commissioning. The objects configured with ETS are “translated” into BACnet objects according to the following process:
The BACnet object instance number is identical to the object number of the ETS. Objects with a 1bit data type are translated into “binary“ objects all others become “analogue” objects. The parameter “Object Mode“ (INPUT, OUTPUT, VALUE) completes the transformation to a BACnet object.
The ComBridge BNG is equipped with a web server which makes it possible to display the configuration as well as present values in an overview. This display is useful for testing purposes and for interface documentation between KNX and BACnet.