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| Re: interlocking drop 15/10/2011 at 21:17 #21807 | |
Firefly
521 posts |
Quote:We've got one at the minute where you take a signal out of auto and several track indications light up. Put the signal back into auto and the track indications go back out!Interesting how it happens when the Auto Button light is extinguished. If it was the other way around and your tracks lit when the Auto Button lit you could suspect some sort of insulation breakdown somewhere. However, the fact that it occurs when the Auto light is extinguished adds to the mystery. Is there a PIRU attached to the TDM? Some of those old PIRU cards can be particularly temperamental. Is it channels from different cards that are getting falsely energised? It's a good job it's not happening on the controls system! FF Log in to reply |
| Re: interlocking drop 24/10/2011 at 11:32 #22000 | |
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button_pusher
56 posts |
Its the same bit over several cards. Looks like the replacement card carrier (that was swapped with the initial fault) was also defective, this has been replaced and no further problems! If it was the control system then he wouldn't of been able to get button flashes/cancel routes or swing points on the IPS. The interlocking remains unaffected, its just the non-vital link between the two. Interestingly though, with the first set of indication failures, one route was prevented from calling (no button flash and no route called) which only occurred when this fault presented itself. Once we managed to swap to fault to other bits then no other control faults occured. Log in to reply |