XTBA DALI Watch Manual Page
18
of
26
Product # - 03/2013
© XTBA 1986 – 2013
Max Level
Min Level
Power On Level
Fail Level
Ballast
Failure
Lamp Power
Limit Error
Reset State
Version Number
DTR Level
Device Type
Power Fail
Actual Level
Once selected the Watch will continually send the query command and the
answer will be displayed in the top right. Answers will be Yes and No, levels
will be displayed with ‘D’ or % and values. If a level or value is expected ‘NA’
will be displayed if there is no answer.
DALI Parameters
Available if DALI being received
DALI Bit Time/Word Time
Interbyte Time
DALI Word Range
Frame
Time C1 to C1
Framing Errors
DALI Input Voltage
Available if DALI is not being received
Device Response Time
The DALI Parameters can display numerous timings of the DALI being
received. Pressing the Yes button with bit time displayed the display might
look like this:
Bit and Word Time
B I T
T I M E W O R D
T I M E
8 4 0 m s
O K 1 4 . 0 m s
O K
On the right of the value will be OK if the time is in range or ERR if out of the
DALI specification.
Bit Time
The DALI protocol uses bi phase encoding so it is difficult to measure the full
bit length in a data stream. The Watch measures the half bit time and
presumes that the second half of the bit is the same time as the first. One can
only hope. Range is 750us to 916us (833us +/- 10%).
Word Time
The word time is calculated from the falling edge of the start bit of the word
pair (address and command byte) to the rising edge of the first stop bit, 18 bits
in total.
The stop bits are not counted as part of the word as you can’t count what
doesn’t change. So the range is 13.5ms to 16.5ms (18 x 833us +/- 10%)
When in a Parameters pressing the Menu button will take you to the next
function.
Interbyte Time Interbyte time in ms:
D A L I
I N T E R
B Y T E
T I M E
1 2 . 6
m s