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The Points Flick Alert is designed to fire when detection is lost on a set of points during the passage of a train.

Real Example

(1547 points out of correspondence while CT track circuit occupied)

Channel Inputs

Track Circuit TPRThe track circuit that runs over the set of points
Normal Detection NKRThe normal detection input channel
Reverse Detection RKRThe reverse detection input channel

Logic

The alert will fire if either the NKR or RKR changes state whilst the TPR is in Dn state.

 

 

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