Minder 'Protected Loop' problem

Hi everyone...
I have a Minder MK2 running my integrated lighting, security and reticulation - yes.. that should read 'still running'!!
I love the Minder and it has hardly missed a beat in the last 10 years.. one comms failure, replace chips and after a $2 spend we were back up and running !
HOWEVER, the security module is now playing up. What happens is that the digital inputs all 'short' and when armed the system false alarms. This 'short' now happens frequently during the day as well, however it is just logged and I am able to view the history via the keypad.
Any ideas on what I can do to fix this - I assume it is a controller problem as all protected loop inputs 'short'..
Cheers
Ian

 

Hi Ian

I remember a similar problem about 10 years ago. I remember there being an intermittent component failure on the main board with the power supply regulator... had to do with the load conditions (there were lots of detectors creating a large load). Do you know how long the short condition lasts? If it's momentary, you may be able to 'ignore' it or not look for the condition (only look for alarm). If it lasts a little longer, maybe try powering the PIR's (assuming you are powering them from Minder) from another power supply to reduce the load on the on-board power supply. You could also possibly move some of the PIR's onto the keypad power supply (can't remember what it can provide) to see if that helps.

Cheers

 

Thanks for the reply, Conformist..

The 'short' condition is only momentary. However, there could be a few of them within a couple of minutes. So I think your suggestion of ignore and look for alarm is the way to go. Problem is, I am not an expert coder. I can get by ok, but have attached an excerpt of my Alarm scenario below and any help will be greatly appreciated!!


... /* Alarm Scenario
... /* v0.5
... /* 19/3/99
... /* Copyright C
Log 'Alarm included'.
... **** log cause of alarm.
If 'D/S Doors' is not 'Closed', then log 'D/S Doors intrusion'.
If 'Family M/D' is not 'Off', then log 'Family M/D intrusion'.
If 'U/S Doors' is not 'Closed', then log 'U/S Doors intrusion'.
If 'Dining M/D' is not 'Off', then log 'Dining M/D intrusion'.
If 'Study M/D' is not 'Off', then log 'Study M/D intrusion'.
If 'Master Bed M/D' is not 'Off', then log 'Master Bedroom intrusion'.
If 'Vibes 1' is not 'Off', then log 'vibe 1 intrusion'.
If 'Garage M/D' is not 'Off', then log 'Garage M/D intrusion'.
If 'Front Door' is not 'Closed', then log ' Front Door intrusion'.
... ***** Siren / Screamer
Pulse 'Siren' to 'On' for 'Alarm Reset Time'.
Pulse 'Screamer' to 'On' for 'Alarm Reset Time'.
... ***** Strobe
Pulse 'Strobe' to 'On' for 10:00.
... ***** The phone will dial the owner/friends at 15 minute intervals
Pulse 'Intruder Alarm' to 'Active' for 15:00.
... ***** And Security every half hour
... ***** The alarm will go off for Alarm Reset time, then not come on again for another 6 Hours (if not disarmed)
Pulse 'Flag - Alarm has recently sounded' to 'True' for 06:00:00.
... ***** Log events
Exclude 'Alarm'.

Thanks again..
Cheers
Ian

 

Hi Ian

The trigger for the alarm scenario is not here in the code you've posted. PM me and I'll take a look at it offline for you.

Cheers