Clipsal C-Bus Bedienerhandbuch Seite 66

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C-Bus™ Basic Programming 1250SM0904R10/09
C-Bus™ Products Training Course 10/2009
60 © 2009 Schneider Electric. All Rights Reserved.
C-Bus Message Types
All C-Bus Key Functions (On/Off, Dimmer, Timer, Preset, Bell Press etc)
consist of these three message types. The C-Bus messages that can be
transmitted by any C-Bus input units:
On Commands
Off Commands
Ramp to Level Commands.
The On and Off commands will set a C-Bus group address to the On or Off
state. A Ramp to Level command will ramp a group address:
to a specific level
over a specific period of time.
NOTE: C-Bus timers are controlled via the programming inside the input
unit. Once a C-Bus timer is started it will decrement the time in 1 second
intervals. The maximum time that a C-Bus timer can count is 18 hours, 12
minutes and 15 seconds.
Status Report Interval
The Status Report Interval (SR Interval) is a highly efficient reporting
technique used by C-Bus. Its main purpose is to ensure that all group
addresses on a single given C-Bus network are in sync with each other.
If the Status Report detects that group addresses are out of sync, the units
on the network will automatically self correct the discrepancy. A Status
Report occurs every 3 seconds by default. This means that if a discrepancy
is found, it will be corrected within a few Status Report cycles.
The Status Report is generated for every Lighting application that exists on
a C-Bus network. Some C-Bus units may initiate Status Report’s regardless
of which application address they are using. When a Status Report is
initiated, units will buffer any C-Bus commands until the Status Report has
completed its error checking for that particular application.
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