Hi, I have a Texecom Premier 88 installed in my house and I would like to start arming it at night. We don't like the idea of having to Disarm the system if we need to go downstairs at night. All the upstairs zones would be omitted for the part-set, would there be a way for the panel to automatically Disarm if the landing PIR is activated when part-set? And then automatically set again if there has been no movement downstairs after 30 minutes? Thanks