PD00D01KNX
– Product Handbook
Eelectron Spa
Via Claudio Monteverdi 6, I-20025 Legnano (MI), Italia
Tel +39 0331.500802 - Fax +39 0331.564826
[email protected] www.eelectron.com
C.F. e P.IVA 11666760159 - Capitale sociale: 800.000,00 interamente versato
Tribunale di Milano 359157-8760-07 - CCIAA Milano 1486549
PD00D01KNXFI00030103.DOCX
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Communication objects
Obj.-no.
Object name
Function
Type
Flags
25
Brightness value
(internal)
Value in LUX
2 Byte
9.004
CRWT
This object sends its brightness value to the brightness measuring device. If cyclical sending is switched off, then the
value can be determined via the bus with a read query.
The measurement range for the internal light sensor is between 20 and 1000 Lux. This value can be changed by
calibration.
The upper limit for the internal brightness value after calibration is 20000 LUX.
26
Brightness value
(extern)
Value in LUX
2 Byte
9.004
CRW
This object feeds a value from an external brightness measuring device.
27
Brightness value
(calibration)
Value in LUX
2 Byte
9.004
CRW
Because the light sensor measures only the light reflected from the desk, it can be calibrated.
During calibration, the brightness value in the room in which the device has been mounted should be that used later as
the setpoint for constant lighting control.
The ETS (diagnostic mode -> send telegram) is used to send the previously measured value to the device via the above
object. The measured value is entered as a decimal number in the entry field of the ETS. The ETS codes this value as
DPT 9.004 (EIS5) and sends it to the device. As soon as the value has been received, the adjustment factor is
computed from it (brightness value = adjustment factor * measured value).
If the parameter “Measuring method of the internal light sensor” has been set to “indirect”, the recomputed value is
output as the internal brightness value.
Note 1: When calibrating object 27, plausibility checks are carried out. If the value communicated via the object is more
than 20 times the value measured by the internal light sensor, the adjustment factor is set to 1. It is the same if a value
above the internal brightness value (20,000 LUX) is transferred.
In case of a received telegram with 0 LUX the factor will be reset to “1” (= factory settings).
Note 2: Owing to rounding errors, the measured and recom
puted brightness value (“Internal brightness value”) can
differ slightly from the value recorded with the external measuring device.
Note 3: The controller works only properly if the calibration procedure was successful and is stored within the flash
memory. After a firmware update the factor and the control characteristic remains.
