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VELBUS INSTALLATION GUIDE
6 PROGRAMMING THE MODULES
THE PRINCIPLES OF WORKING WITH VELBUS
The Velbus home automation system works without a central control unit.
Every Velbus module has its own micro-processor and therefore is
independent and secure.
Whenever a button is pushed (or another action is triggered), the associated
Velbus module will send a pulse on the data bus containing its address and
channel.
At the same time, every module monitors the Velbus data bus for pulses
coming from other modules. Whenever a pulse passes that they should
respond to (according to the program that has been written into their
memory), they will carry out the corresponding action. For example, a relay
unit, if programmed to do so, will respond to the push of a button elsewhere.
Inversely, a push button module will respond to a pulse by a relay module by
setting its feedback LEDs.
The programming is thus retained within the output modules (for instance
relay, dimmer and blind modules). If an output module is configured to
respond to more than one input module, an (unlikely) failure in a single input
module will not affect the interaction between the output module and the
other modules.
Each output module can be programmed to respond to any button or feature
on the Velbus system (i.e. movement sensor, temperature sensor, alarm time,
temperature alarm, button presses, ...).
For example, programming an "all off" function in a Velbus installation is fairly
straight forward, because input modules (like the push button interface
VMB8PBU) will not have tasks assigned to them. Only the output modules need
to be programmed to turn off when the "button pressed" pulse appears on the
bus. This command is very simple for the Velbus network to react to as very
few pieces of information need to be present on the data bus at any one time.
This way the bus remains empty most of the time, which greatly improves the
stability and reliability of the system.
©2015 Velbus
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www.velbus.eu
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