Device Address For The Qaw740 Room Unit - Siemens Synco 700 Series Basic Documentation

Introduction
Bus power supply
Device address
Note
Commissioning for the
first time
Setting procedure
Building Technologies
HVAC Products
5.7

Device address for the QAW740 room unit

The QAW740 room unit is the only room unit in the Synco range that can be
connected directly to the KNX bus (connections CE+ and CE-).
The QAW740 room unit does not power the bus.
Decentral or central bus power supply is required for communication via the KNX
bus (see section 2.2).
The device address is factory-set to 255. For communication via KNX, this device
address must be modified.
If there are no couplers or IP routers, the factory-set area/line address 0.2 is used.
The procedure for commissioning is also described in the instruction sheet B1633
(enclosed with the device).
When the QAW740 room unit is connected to the bus for the first time, the bus
power will directly initialize the "d" field. The device address can now be set.
Proceed as follows:
• Use the knob to set a device address or use the timer button
search for an unused device address.
• Confirm the setting with the presence button
automatically checked in this process. If the entry is incorrect, start the process
again.
Once a QAW740 room unit has been connected to the bus power supply and a
device address other than 255 has been set, it is no longer possible to initialize the
"d" field directly via the bus power supply. The device address then has to be set
as follows:
In the case of the Synco 700 room unit QAW749, the device address can be set
using the controls on the front of the unit.
Step Action
1 For access to the setting mode, press the presence
button for approximately 12 seconds. The display
shows Prog.
After access to setting mode, press the presence
2
button briefly several times, until the device address
setting appears, e.g. d 255.
3 Use the setting knob to set the required device
address, e.g. d 5
Note: d stands for "device"
4 After setting the device address, press the presence
button to exit from setting mode.
Note: After setting the remaining program values, the timer button is
used to exit from setting mode, not the presence button.
Basic documentation: Communication via the KNX bus
Device addresses via ACS
to start the
. The address entered is
Operator
controls
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CE1P3127en
30.08.2007