Implementing optionnal cmd

You do not have to implement those things that are optional.

If something is NOT markled optional, then you MUST implement it to become C-Bus Enabled.

 

Yes.

The normal terms used in security are that a Zone is SEALED if everything is OK, the sensor is working (not tampered with) and that during arming it all checked ok.

Unsealed is the opposite of sealed. A zone becomes unsealed if the sensor detecs intrusion.

i'd strongly suggest you use Sealed and Unsealed.

For some security systems (those that use end of line resistors, typically) it is also possible to detect if the wiring to the zone sensor is being tampered with. It may be that the wiring to the sensor goes open circuit (zone open), or short circuit (zone short).

In many security systems, such attempts at tampering can be detected, so we allow those conditions to be reported as specific states of the zone.

The security system will be doing the moniroting, so I think the question is "how do I say that the security system is again monitoring this zone". In that case I think there is a zone status message (I don't have the full prototol documentation in front of me at home).

No problem. There is no such thing as a zone in cbus lighting. The zone numbers are security zones, and have whatever meaning the security system wants them to have.

 

The zone messages are for reporting what the zone is doing.

The tamper message is an overall status. So, for example, if you detect that a zone has been tampered with (and gone short or open, for example), then you would send out those zone messages.

If as a consequence (for example, your system is monitoring that zone and is interested in it), then you might say "ah hah - it is time to do whatever we do when we have a tamper" - which might be to turn the siren on, dial out to central station, etc. At that time you also issue the Tamper message.

On the other hand, if the zone was tampered with and you have set the system to be not interested in that zone, then you report what the zone is doing, but you take no further action. In that case you might report Zone open / short + zone isolated, and the tamper condition never occurs so you never report it.

The tamper off message will be sent onto cbus after clearing the condition that previously caused Tamper On.