Faq - Siemens Desigo RXB Technical Manual

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Siemens
Building Technologies
13

FAQ

What happens if the parameter download process is interrupted ? (power failure,
bus failure etc.)
The parameter set loaded into the controller is incomplete. The controller does not start
properly. Valves may not open.
Reload the parameters.
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" ?
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
started again.
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
parameters.
ACS : CLC01 shows the lower limit of 21°C for the Comfort cooling setpoint.
Setpoint data are only updated when the application (RAD01, CLC01, ...) has been
selected.
RXB (KNX) Applications library
FAQ
CLC and RAD description of functions for CC-02 CM110384en_03
129/140
28 Feb 2009