ABB i-bus KNX Product Manual page 183

®
ABB i-bus KNX
Commissioning
No.
9
This group object is enabled if the Enable Group object "Flexible time for dimming/fade time..." parameter is set to Yes in the
X Output: Functions (Turn off brightness/Burn-in/Slave offset/Partial failure) parameter window, p. 67.
This group object defines whether the dimming time can be changed via KNX.
There is only one flexible dimming time per DALI output; it affects all parametrized flexible dimming times on the output:
•
•
•
•
Whether the group or ballast responds to flexible dimming time is defined in the Group x or Ballast x parameter window.
Note that it is not the sent KNX value in the DALI devices which is used for scene transition, but the nearest DALI value
defined as a fade time in DALI standard EN 62386-102. The gateway runs a mathematical rounding operation in order to
determine the most suitable DALI value.
For switching off/on and for setting brightness values, when setting times longer than 32 s the exact time value is used instead
of the rounded DALI value. In this case there is a tolerance of ± 3 s. Scene transition times are an exception to this rule. For
scenes, the rounded DALI times apply to the whole range, with a maximum transition time of 90.5 s.
Telegram value:
Function
Flexible time for dimming/fade time
(time 1s)
Dependent on parameter
Dimming time for turn on/off value
Dimming time for brightness value
Dimming time for slave brightness value
Scene transition time
0...65,535 x 1 s:
Telegram value
in 1 s
0
1
2
3
4
5 and 6
7...9
10...13
14...18
19...26
27...32
> 32...65,535
Scene
27...38
39...54
55...77
78...91
> 91...65,535
The fade time is specified as the time required to change the lamp power from the current brightness
value to the required target brightness.
If a lamp is switched off, the preheat and ignition time are excluded from the fade time.
The default value is set at 2.0 s until the first value is received.
During a KNX failure or download, the fade time received via the KNX is lost and replaced by the
default value of 2.0 s.
Group object name
Output A
Object format of flexible time for dimming/fade time
Active fading time [s] to EN 62386-102
jump to
1.0
2.0
2.8
4.0
5.7
8
11.3
16.0
22.6
32.0
Time values with an error tolerance of ±3 s
For scene transition time the rounded DALI times applies to
the whole range.
32.0
45.3
64.0
90.5
Mapped to 90.5 seconds for scene
DG/S x.64.1.1 | 2CDC507164D0201 181
Data type Flags
2 byte C, W
DPT 7.002