Variables

The intelligence in the DALI system is not 100% centralized. This means that a large number of settings and light values are stored in the form of variables in the ballasts.
Click on Variables. A dialog mask in which you can inspect and edit the variables for the selected DALI device appears.

Actual dim level

This variable contains the power currently applying to the lamp.

Power ON level

This variable specifies the lamp power that the DALI device is to adopt after the power supply has been switched on, if the DALI bus is already under power and is idle.

System failure level

This variable specifies the lamp power that the DALI device is to adopt in the event of a system error.

MIN level

You specify the minimum lamp power that the DALI device is to adopt here, so that the illuminance does not fall below a level that you want. The MIN value cannot be less than the smallest physically possible value specified by the manufacturer of the DALI device.

MAX level

You specify the maximum lamp power that the DALI device is to adopt here, so that the illuminance does not exceed a level that you want.

Fade rate

Enter the velocity in steps per second (step/s), with which the DALI device dims for 200 ms when the commands Brighter (DALI command 1_dec) or Darker (DALI command 2_dec) are issued. The absolute fade rate is not entered directly, but it is calculated according to the following formula:

	T = absolute fade rate
	n = value that is stored in the Fade rate variable

The following values result:

n	absolute fade rate
0	Not permitted
1	357.796 steps/s
2	253.000 steps/s
3	178.898 steps/s
4	126.500 steps/s
5	89.449 steps/s
6	63.250 steps/s
7	44.725 steps/s
8	31.625 steps/s
9	22.362 steps/s
10	15.813 steps/s
11	11.181 steps/s
12	7.906 steps/s
13	5.591 steps/s
14	3.953 steps/s
15	2.795 steps/s

Fade time

Enter here the time in seconds that the DALI device is to take to change the brightness when, for instance, changing a scene, or to execute direct DALI commands for lamp power. This time is independent of the size of the change, so that all the lamps complete their change over the same period. In the case of a lamp that is switched off, the pre-heating and ignition time is not included in the fade time.
The absolute fade time is not entered directly, but it is calculated according to the following formula:

	T = absolute fade time
	n = value that is stored in the Fade time variable

The following values result:

n	absolute fade time
0	< 0.707 s
1	0.707 s
2	1.000 s
3	1.414 s
4	2.000 s
5	2.828 s
6	4.000 s
7	5.657 s
8	8.000 s
9	11.314 s
10	16.000 s
11	22.627 s
12	32.000 s
13	45.255 s
14	64.000 s
15	90.510 s

Direct address

This variable contains the DALI device's short address. A valid short address lies in the range between 0_dec and 63_dec. If 255_dec is written into the variable, the short address is deleted.

Status information

This variable can only be read. It contains the DALI device's status byte. The bits in the status byte have the following significance:

Bit	Name		Meaning
7	Power supply fault	0_bin	No
6	Missing short address	0_bin	No
5	Reset status	0_bin	No
4	Fading done	0_bin	Fading has been completed
4	Fading done	1_bin	Fading in progress
3	Limit value error	0_bin	The most recently requested lamp power value was between the MIN and MAX values, or was OFF.
2	Lamp power	0_bin	OFF
2	Lamp power	1_bin	ON
1	Lamp failure	0_bin	OK
0	Status of the DALI device	0_bin	OK

Version number

Displays the DALI device's version number. This variable is entered by the device manufacturer, and can only be read!

Physical minimum level

Indicates the lowest physically possible lamp power that the DALI device can adopt. This variable is entered by the device manufacturer, and can only be read!