Keri Systems Doors.NET Manual - Manual (Page 529)

Doors.NET Reference Manual
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Local Linkage
The Local Linkage section is by far the most powerful feature of the Doors.NET system.
It is an advanced input/output management application that allows you to easily cus-
tomize the operational mode of the controller to suit individual requirements.
Note: The feature is only supported on Mercury and Mercury Powered controllers or
using I/O modules connected to either of those controller types.
You can create custom linkages with each NXT-Mercury Powered or Mercury controller
on the system. This feature can be thought of as a white-board that allows you to determ-
ine any IF condition to action any WHEN condition.
The WHEN can be referred to as Procedures, the IF conditions can be referred to as
Triggers. Once configured and assigned, all trigger conditions and procedure actions
are executed by the controller itself with no reliance on the PC - (the controller does not
have to be 'online' to the Doors.NET software). The controller simply executes the pro-
cedure actions when the trigger conditions are met.
For example, local linkage could be used to;
l
Unlock all doors on a controller when an input changes state
l
Lockout or Lockdown all the controller's doors when an input changes state or if a
door is 'forced open'
l
Enable, disable or set an occupancy count at an access area
l
Activate more than one output relay following access granted from certain card-
holders
l
Unlock a door with a certain keypad command then relock it again with a different
command
l
Activate a controller output if the controller, or any of its readers go offline
Or Local Linkage can be used to program multiple actions to happen based off a trigger,
i.e when a certain event happens you may want to activate an output or a group of out-
puts and at the same time change the reader mode at a certain door and abort or
execute a completely different local linkage action at the controller.
There is almost an endless list of possible local linkage actions that can be created. Feel
free to contact Keri Systems Technical Support for further, more in-depth information or
further details about training sessions that are held covering this topic.