Siemens DESIGO RXC - Page 17

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Siemens RXZ95.1/LON – Gateway EnOcean/LonWorks CM2N1661en_02
Building Technologies Sources of errors 23 Sep 2011
Impact on the system:
T0 --
T1 All temperatures = 0.0 C after Power_fail / Power_up.
Room unit sends current temperature after about 20 to 30 minutes.
T2 RXC polls the gateway (0.0 C) and sends value to the system.
T3 Frost alarm (0.0 C). This state continues until all EnOcean room units
have transmitted a valid temperature. This takes about 20 to 30 min, but
may take longer than an hour should short breakdowns occur.
If a room unit does not send (e.g. exhausted), frost alarm is maintained until
that room unit sends as well.
With each simultaneous power failure of the RXC and the gateway, the
system triggers frost alarm for 20 to 30 minutes. The same applies to
power-up.
F10:
Power_up / Power_fail
system