53 Helvar 924 LCD TouchPanel: Installation and User Guide
Doc. 7860137,
issue 6, 2014-08-28
21. About the Lighting System
To help you get the most from TouchPanel, especially if you intend to customize its operation, it is useful to know a little
about your lighting system, and how it can be controlled using TouchPanel’s features. We therefore recommend that you
take a few minutes to read the following sections carefully before proceeding to other parts of this guide.
This guide provides an introduction to lighting and Digidim, so that you can use TouchPanel
effectively. To learn more about these subjects, see Digidim Lighting Control Designing, Specifying
and Installing (Document 7860038 (available separately). If using TouchPanel in a Lighting Router
system, see the online help provided with Workshop software (available separately), or contact
Helvar Customer Support for details of training courses.
21.1 About Lighting Circuits
A lighting circuit is a collection of one or more lights that are connected together and therefore work together. A typical
room may include one or more circuits, each one controlled by an on/off switch, or dimmer. Each channel of a dimmer is
wired to a circuit of loads (usually lights).
21.2 About Broadcast And Groups
When a command is sent from a control panel, it reaches every device in the lighting system, but usually we only want a
few devices to respond to that command. We achieve this by addressing commands to specific Groups, so that only devices
in the Group respond. However, we may want to set a level for all loads in the lighting system. To do this we send the
command without specifying a Group. In other words, we send it as a Broadcast.