What happens if the parameter download process is interrupted ? (power failure,
bus failure etc.)
The parameter set loaded into the controller will be incomplete. The controller will not
start up properly. For example, the fan may run but the valves do not open.
You will have to download the parameters again.
Why does the controller fail to start after a parameter download ?
(Applies to HandyTool, ACS or ETS)
Parameter download was probably interrupted or exposed to interference. Reload the
controller with the entire parameter set (via HandyTool, ACS or ETS).
Why does the controller not start after adjusting certain parameters?
(applies to HandyTool.)
Parameter download probably interrupted or fault, or controller unloaded via ETS.
A complete parameter set must be loaded in the controller
(via HandyTool, ACS or ETS).
Why does the HandyTool not display parameter 1 upon quick quit and restart of the
Display mode ?
Communication to the HandyTool is relatively slow.
You need to wait a brief moment before reopening the Display mode.
Why does the HandyTool display "uuuu" ?
The controller to which the HandyTool is connected does not support the Test mode
(RXB2x controllers with index A).
Other parameters have been changed so that the selected parameter became irrele-
vant. Just continue your work;. the problem will disappear when the parameterization is
ACS: Why is reading back parameters so slow?
Check to make sure that neither the operating booklet nor the plant image is active.
Both applications cause a lot of bus traffic and thus slow down reading back
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12
28 Feb 2009