Door switch input does not change value.

Issue

Door using AC1/AC1Plus does not change value (Open or Closed), the value of the Door Switch attribute is stuck in Open or Closed regardless of the physical position of the door switch contact.

The door switch contact itself is working fine when verified using a multi meter.

The supervision resistor(s) are also connected property.

Product Line

Andover Continuum

Environment

Cyberstation

CX9900

CX9680

AC1

AC1-A

AC1Plus

Cause

1. There is an input configured to use the same channel as the door switch.

2. The door's exit IOU has been set the same as the entry IOU.

Resolution

1. Delete the input that is using the same channel as the door switch, (or use a different channel number) it maybe necessary to reload the controller after removing the illegal configuration to recover.

2. Set the exit IOU appropriately,  ZERO if the door is entry only or correct IOU number of the second AC1 on the exit side for an entry/egress door.  it maybe necessary to reload the controller after removing the illegal configuration to recover.