ABB i-bus FCC/S 1 1 Series Product Manual page 349

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ABB i-bus KNX
Group objects
No.
102
This group object is enabled if, in actuator mode, the parameter Connection of an analog room control unit to
physical device input a in the Setpoint adjustment parameter window is set to Yes.
This group object is hidden in controller mode.
When an analog room control unit is connected, this group object establishes communication between the
actuator and the controller. The analog room control unit can adjust the fan automation in this mode. The ad-
justment is then transmitted to the controller via this group object.
The controller (master) uses this group object to inform the actuator (slave) whether changeover to fan auto-
mation or from fan automation has taken place.
The analog room control unit is only an adjustment option, so the feedback cannot be indicated via this
group object. However, it is required for proper device functioning.
Discrepancies between the indication and the device reaction can occur during actuator operation with
connected analog room control unit.
If an adjustment is made on a different KX analog room control unit, this is sent to the actuator to
which the analog room control unit is connected. However, the analog room control unit cannot re-
ceive/set this information. The old indication therefore remains unchanged.
The following example makes this clear:
State: Active fan speed 3; automatic mode
1) KNX analog room control unit 1 Adjustment in manual mode and speed 1
2) The controller sends the adjustment to the actuator: Fan speed 1, manual
3) The actuator changes to fan speed 1, but the analog room control unit continues to indicate auto-
The problem can be avoided by using the device connected to the analog room control unit in con-
troller mode. This excludes other analog room control units via which adjustments and thus adapta-
tions via KNX are possible. The analog room control unit is the sole control unit in this case.
102
This object is visible in controller mode.
This group object permits communication between the master and an analog room control unit (slave).
The controller (master) uses this group object to inform the actuator (slave) whether changeover to fan auto-
mation or from fan automation has taken place.
Function
Confirm fan manually (slave)
Note
Note
matic operation
Confirm fan manually (master) Channel – Controller 1 bit
Group object name Data Type
Channel – Actuator 1 bit
DPT 1.001
DPT 1.001
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 349
Flag
C, R, T
C, W