Connect Analog Room Control Unit To Physical Device Input A - ABB i-bus KNX Product Manual

®
ABB i-bus KNX
Parameters
7.10.1

Connect analog room control unit to physical device input a

Options:
This parameter determines whether an analog room control unit should be connected to the device to
adjust setpoints.
•
no: No analog room control unit is connected.
•
yes: An analog room control unit is connected to the device.
If the Yes option is selected, the setpoint for the device can no longer be adjusted by a KNX analog room
control unit. The parameter for setpoint adjustment via KNX is hidden.
When the device is in controller mode, setpoint adjustments made on the analog room control unit are
forwarded directly to the internal controller. The Request setpoint adjustment (master), Confirm setpoint
adjustment (master) group objects are hidden.
Device input a is set to Analog room control unit. Consequently, this input can only be used to connect
the control unit.
The dependent parameters Maximum setpoint increase and Maximum setpoint reduction appear.
The Setpoint temperature request (slave) objects are shown in the actuator mode.
These group objects transmit manual adjustments to the controller.
The group objects used for confirmation are hidden, because the actuator cannot evaluate value
confirmation. Caution! This may result in a discrepancy between the analog room control unit and
the setpoint actually set. Since the analog room control unit is manual and cannot send a value back to
the device, someone may set a value that the external controller will not permit.
The easiest way to prevent this is by using the device's own controller instead of an external one.
Alternatively, either ensure that changes made via the analog room control unit are implemented by the
controller, or accept that discrepancies between the actual setpoint and the one set on the device are
inevitable.
164 2CDC508220D0211 Rev. A | VC/S 4.x.1
No
Yes
Note
Note