Strange behaviour, daylight savings.

Hi, I have an existing installation that I completed approx. 4 years ago. My customer has reported that on the nights of daylight savings changing his main bedroom lights, amongst others, come on in the middle of the night. It is a wired network and besides the usual switches, dimmers, relays it also includes a PAC and Homesafe/Ness alarm panel with the c-bus card.

The homesafe panel will turn these lights on via a scene during an alarm or smoke alarm event. The PAC will turn these lights on as part of a "lived in look" scene triggered via a schedule which is enabled by a trigger group.

Day light savings schedules have been enabled in the PAC but I haven't checked to see whether the alarm panel automatically changes its time. Has anyone come across this before or have any ideas as to why it might be happening.

 

You really need to nail which unit is causing the trouble. To do this, you need to set up a scenario where daylight saving kicks in whilst you're monitoring the C-Bus traffic. You will then know which unit is causing the trouble.

Since daylight saving is coming soon you could set up the Diagnostic Utility to monitor the traffic overnight and log the traffic to a file, or you could change the dates and times on all devices in your network to something more convenient.