Atomic Systems

Hi folks
Having just bought the Southern 455 from Steam I applied the AP sounds to it.

When the doors close after station duties the brake pressure does not fall back to 1 bar of pressure (it rises to 3 bars when the doors open).

To get brake release for some reason I have to apply one notch of power and the brakes will then come off.

What's all that about please?

DS

Think it's a glitch with the 455 regardless of weather it's got the app patch or not, the interlock kicks in on full service with the doors open ( as far as I'm aware this shouldn't happen with the 455s as unless the southern batch have been modded) they shouldn't be interlocked! Even the local drivers doors aren't interlocked either. Also correct operation should be that when the key is removed and desk is locked, full brake should be applied on the southern version, this releasing to appropriate step when unlocked.

The only thing the interlock does is prevent power from being taken, a full brake release could still occur as with other similar units.

Interlock is bit annoying really, not sure if it can be fixed as dtg would have to edit the Lua file which unfortunately is an .out file so that would probably require a new code.

Out of interest, the door interlocks catch 456 drivers out as they are interlocked! It's a shame they never came out driver only too as all the southern batch are.

JasVick wrote:Think it's a glitch with the 455 regardless of weather it's got the app patch or not, the interlock kicks in on full service with the doors open ( as far as I'm aware this shouldn't happen with the 455s as unless the southern batch have been modded) they shouldn't be interlocked! Even the local drivers doors aren't interlocked either. Also correct operation should be that when the key is removed and desk is locked, full brake should be applied on the southern version, this releasing to appropriate step when unlocked.

The only thing the interlock does is prevent power from being taken, a full brake release could still occur as with other similar units.

Interlock is bit annoying really, not sure if it can be fixed as dtg would have to edit the Lua file which unfortunately is an .out file so that would probably require a new code.

Out of interest, the door interlocks catch 456 drivers out as they are interlocked! It's a shame they never came out driver only too as all the southern batch are.

The door interlock on the real 455's is only tied to the power circuit (so when the doors are opened and interlock is broken the driver just cannot take power but would be able to release the train brakes completely if he/she so wishes) it is not connected to the brake continuity, so as you say this is a glitch with the sim version of the 455. The cab doors are on the interlock circuit just when the DKS (Door Key Switch) is active that cab, the cab (or local) door is taken out of the interlock circuit so the train can move with that door open (this was because when the units were first built guards could have the door open to dispatch the train and stand in the door way unit the train was safely out of the platform). You are sort of right when the cab is shut down (the master controller placed into the off position) the brakes are put into the emergency position, when the cab is opened the driver will move the master controller to Forward and the AWS/TPWS will self test once the driver presses the reset button the brakes will discharge to whatever position the brake handle is in as long as there is brake continuity. If the driver moves the controller from off to Neutral (passing through forward) the brakes will not release when the AWS reset button is depressed as again this is a little fail safe, the same as when the emergency brakes are applied or brake continuity has been broken above 9mph the brakes will only release if the master is in forward or reverse.

The door interlock on a 456 (built in 1990/91) is slightly different due to the units being made later than the 455's (built in 1983/4) so the 456's have to follow different rules/regulations, such as having have DVD (drivers vigilance), Door interlock on the brake continuity circuit, etc. the 456's you can still release the brakes when stationary and if the doors are opened in this sense they are the same as the 455's, however when you start to accelerate thats were there differ, the 456's when you get to over 9mph and the SSR (speed sense Relay) switches over if the door interlock circuit is broken (for whatever reason) the emergency brakes are applied and a 2 minute timeout is incurred before the brakes can be release, when slowing the train and the speed drops below 6mph the relay switches back over and then the door interlock circuit is now not tied to the brake continuity.

I'm guessing this is a bit too difficult to simulate in the simulator.

Thanks for the clarification, wasn't 100% sure! It probably could be installed, with a bit of scripting as the speed etc can be monitored so I don't think it would be to much of a problem to put in if it could be worked out. The timing simulation is already included with some locos for the brake release with an aws application or other similar fault so I again assume it wouldn't be to hard to incorporate. Its a shame we cant over-ride the door open command and make it a switch so that it would release the doors without having the timing delay on the system, could make simulating Driver only much easier (certainly with the various units that have already got the driver only close facility!)