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Posted: Wednesday May 29th, 2013 02:10 am

Joined:	Wednesday Aug 9th, 2006
Location:	Singapore
Posts:	3493
Status:	Offline

You may be able to do some measurement on the zones connected to the Comfort and Slaves (which are analog inputs), but not on the LEMs

The A?zz command where zz is the zone number in Hex returns the value of the voltage on the zone terminals
eg in Monitor I/O screen

> A?08
< A?0860

the reply A?0860 means the analog value at zone 8 is 96 compared to ful scale of 255 (FF)
For a double eol zone, the nominal values are
Zone Open circuit    > C0 hex
Zone Open              A0 hex
Zone Closed            60 hex
Zone short circuit    <60 hex

as the wire resistance increases the zone values would increase so this could be used to determine the "health" of the zone wiring

This method cannot be used for LEMs as mentioned

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