Gewiss Chorus GW90871 Mode D'emploi page 19

The KNX-DMX Gateway in REG casing IP20 is available in sizes of 6 DIN units.
Firmware upgrades can be done via USB port.
Automatic Dimming Function:
Automatic dimming function can be switched on or off for all channels using an object, or can be parameter-
ized by S3 when booting up.
Thereby the properties are controlled when a dimming telegram (DPT 3.007) appears.
- Automatic function Off ( S3 = 0 )
A dimming object (4 bit) value range +7 .. -7 singularly reduces or increases the DMX value percentagewise.
- Automatic function On ( S3 <> 0 )
A uniquely transmitted dimming setting is repeated during a time period (dimmer repetition) until it reaches a
value of 0 or 100% or until it is manually stopped.
When 100% is transmitted, the preset value in „dimming curve" is used (basic setting 1%).
This function allows the integration of the KNX-Gateway for an installation with standard key buttons.
A standard key button transmits a 100% upward or downward command in dimming function when pushed
and held and a stop command when let go.
A dimming setting can thus be set.
The dimming time period can be adjusted separately using either the parameter repetition or the dimmer
curve.
The basic setting after booting up is 1% dimming.
The repetition rate is controlled by the rotary switch S3 and gives a dimming time result of circa 1.5 sec *
switching value (S3 = 1 .. 15 (F).
Address Diagram
The KNX-DMX Gateway is a master device in the DMX bus.
It possesses an internal data memory and constantly transmits the data at a DMX rate of 250k baud to all 512
DMX channels.
When receiving valid DMX telegrams the values in the memory are changed.
The transfer of the KNX telegram is preconfigured so that individual programming is not necessary.
The KNX data points are managed in 3 address rooms.
That means that switching or dimming can be accessed on every channel.
The group addresses diagram must be set up using the S1 rotary switch before initial operation (voltage sup-
ply).
Changes become effective after a reset.
The main group addresses from 0 – 15 are set up with the 16 stage rotary switch.
The middle and lower group addresses are set by the predetermined address rooms (see table 1).
The DPT 5.001 allocates the first 512 address on the KNX bus. After that the DPT 1.001 and
DPT 3.007.
Finally, the sequence commands, a test function and dimming parameters are coded.
Group Address Allocation Lower Group (bi-level KNX Address Room):
Set Channel Value:
Addresses 0 - 511
To set a 1 byte value, use the lower group addresses 0-511 which correspond to the channels 1-512 on the
DMX bus.
Switch Channel Value:
Addresses 512 - 1023
Using a switch, this function can be used to switch every channel separately.
When the value is 0 the channel is switched off (0), when it is 1 the saved value in sequence 8 is accessed
and transmitted to the DMX512 bus.
Every DMX channel can be independently switched.
with DPT 5.001 1 byte value ( 0 .. 100% )
with DPT 1.001 1 bit Value (Switching)
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