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SimSig Edinburgh
External Signal Boxes
Longannet Signal Box Auto Working
Down Trains
Warning

SimSig Edinburgh

External Signal Boxes

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Millerhill

Millerhill is a separate signal box controlling Millerhill yard and the Newcraighall area. A representation of that area is included in the sim, it is not totally accurate beyond Newcraighall.

Trains timetabled to go through Musselburgh may be diverted via Millerhill yard with no alteration required to the timetable, the line is fully electrified. If you divert a train via Millerhill it is best to phone Millerhill first as this will help avoid unnecessary delays to the train.

Trains timetabled to travel through via the yard will leave the sim and will require to re-enter the sim on a separate timetable, there is no code provided to allow such trains to be diverted via Musselburgh without some manual fiddling of timetables.

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Hilton Junction

Hilton Junction is a mechanical box on the Junction of the line between Perth and Stirling, it is a double lead junction tapering to single line at signal HJ7. Trains will enter the sim at Hilton Jn and be held at signal HJ7 awaiting slot release by Edinburgh. Slot release is done by clicking on the slotted signal HJ7. The signal will show white aspect when cleared.

In stand-alone running you will get the standard ‘train entering area’ message and the TD will appear. Hilton Jn signaller will phone after 4 minutes if not released and line is detected as clear.

When chained with North East Scotland you will get a ‘Train approaching Hilton Junction’ message similar to the stand-alone one. In this, the train is not released by the slot, there is no automatic phone call and the operator of North East Scotland will have to make contact with you direct.

A slot is not required before Edinburgh can send a train to Hilton Junction and a train from Ladybank will pass any train held at HJ7.

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Longannet Signal Box Auto Working

WARNING: It is possible to gridlock this location!

Longannet box lies on the reopened (2008) line between Stirling and Dunfermline. At Longannet there is a power station accessible from both Stirling and Dunfermline. However, there is no passing loop as such for through trains. Longannet Signal box in not incorporated into this sim (or Central Scotland) but it is simulated by auto-working and how it works is explained below to assist you in operating Edinburgh. A further complication is the chaining to Central Scotland sim.

The entry points are at Alloa (loop) and Longannet Power station with the full line to Alloa being coded within the sim.

Down Trains

Power Station Trains

A train from Longannet PS will present itself at Longannet Signal box and the TD will appear at Signal EO703. If the line is clear you may signal the train to Charlestown as normal using the slotted signal EO703. If a train is travelling in the UP direction it will pass the train waiting at EO703 with no difficulty.

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Alloa Trains

Around 5 minutes before a train is due to enter the sim at Alloa you will receive a phone call advising you. You have no power to prevent that train entering so you must take whatever action you think appropriate to prevent gridlock beyond Longannet box. You may continue to send and receive trains from the power station while a train is travelling from Alloa. The train will proceed to Longannet where it will then present itself within the TD box at EO713 and the above procedure can be followed. A message will be received as the train approaches Longannet.

A bit of code ensures that Down trains can't occupy the Longannet 'home' TC at the same time which controls the auto working. However, a train can still enter at Longannet PS while a train is travelling from Alloa and vice versa.

In stand-alone the signaller will phone after 4 minutes if train is not released and line is detected as clear.

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Up Trains

When you have a train for Longannet you should first phone the box using the telephone menu (there are a separate calls for the power station and Alloa route). In reality this is a courtesy call as Longannet has no power to refuse a train from Edinburgh but you will be penalised a nominal 5 points for failing to call. ARS will set UP routes from Charlestown and the auto working will take over at Longannet. When you place an ‘Alloa’ call a block will be put in place to prevent a Down train entering for 90 minutes. The block will be raised by one of three events; the passing of the train, a phone call cancelling the train or by the expiry of the 90 minute timer. NOTE: if the latter event occurs you will be penalised 25 points! The timer is restarted every time you place a call, so a series of trains can be sent

Warning

If you place the ‘wrong call’ and don’t rectify it e.g. place a power station call for an Alloa train then that’s your fault so deal with the consequences-I’ve not coded for stupidity!

If a train is travelling Down from Alloa the ARS will not set a route from Charlestown for an Up Alloa train but Longannet trains will be signalled as normal. Once the Longannet Slot has been given from EO713 the ARS will then be disabled from Charlestown to Longannet too.

Manual route setting will still be possible subject to interlocking constraints only. I repeat; care must be taken not to cause gridlock!

Finally, if you try and send a train to Alloa while Central Scotland is connected without the Alloa line option being selected the outgoing train will be diverted to Longannet power station where it will leave the sim.

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Last edited by GeoffM on 15/09/2016 at 03:00