Duty Cycle - HomeMatic HmIP-SPDR Montageanleitung Und Bedienungsanleitung

Troubleshooting
8.2

Duty cycle

The duty cycle is a legally regulated limit of the transmis-
sion time of devices in the 868 MHz range. The aim of
this regulation is to safeguard the operation of all devices
working in the 868 MHz range. In the 868 MHz frequency
range we use, the maximum transmission time of any de-
vice is 1% of an hour (i.e. 36 seconds in an hour). Devices
must cease transmission when they reach the 1% limit
until this time restriction comes to an end. Homematic IP
devices are designed and produced with 100% conform-
ity to this regulation.
During normal operation, the duty cycle is not usually
reached. However, repeated and radio-intensive teach-
in processes mean that it may be reached in isolated in-
stances during start-up or initial installation of a system.
If the duty cycle is exceeded, this is indicated by one long
flash of the device LED (D), and may manifest itself in the
device temporarily working incorrectly. The device starts
working correctly again after a short period (max. 1 hour).
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