Appendix A
Routing
This section contains a more detailed description of the router setting on page 27.
The DANBUSS system is a so-called compact coupled network. This means that information is
transmitted through the system as single messages, also referred to as datagrams. To ensure that the
datagrams reach the correct receivers in systems with many connected units, the transmitter must
enter the receiver’s address in the datagram. It is now up to the router in the DANBUSS system to
direct the datagram to the correct receiver.
To enable the router to distinguish between the individual units connected to the DANBUSS system,
each unit must be given a DANBUSS system address.
This system address is written in the “Network:Address” mode, where “Network” is the network number
and “Address” the address of the unit in question.
“Network” can assume values in the range 0-255.
“Address” can assume values in the range 1-125.
It is important that all units on the same network have the same network number.
Example:
The example shows a system consisting of two networks.
1) PC connected to AKA 245
2) AKA 245 and AKC controller
1:1 means network number 1 with address 1.
2:115 means network number 2 with address 115.
The example shows 1:1 sending a datagram addressed to 2:115.
The datagram is delivered to DANBUSS who will now be responsible for the transmission.
To ensure that datagrams are sent to the correct receiver, the system must contain information
about the composition of the DANBUSS network (the network may consist of several interconnected
networks). Information about the composition of the DANBUSS network must be entered in the so-
called router tables.
There must in principle be router tables in all units that are connected to
DAN BUSS. Certain units, like AKC controllers, can however do without them.
To enable communication in systems with several networks, there must be at least one router table in
each network. The gateway enables you to set up one or more router tables.
General
Routertable
AKA 245 Manual RS8DT102 © Danfoss 09/2004 33
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