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Locked Blocks next to Crossovers are inaccessible as transit destinations

 

JMRI version: 4.13.4
Java version:?1.8.0_191
MacOS: Version 10.13

I've been working on a layout that includes 6 crossovers, 3 left hand and 3 right hand.? I've uploaded my layout to?Full Yard with Signals.? I've been able to create and place signal masts at end blocks, and turnouts on the layout.? I've used the auto-generate signal pairs tool to create signal mast logic, which I ultimately had to convert to not use Layout Paths.? I also created Sections from the Signal Mast pairs.? The signal mast logic looks good to me.? I have created auto trains that traverse the layout and return successfully.

However, when creating transits for automatic trains, I ran into one issue that I can't figure out.? Because the crossovers only allow you to assign signal masts that face outside looking in, I can't create a transit that includes the block next to a crossover as a destination.? For instance, if I create a transit to go from the end of 20 to the end of 24, the last block at 24 is inaccessible because there is no signal mast for 24 East, only 23 West at the open end of block 24.? I could create the signal mast, but I have nowhere to attach it because the crossover prevents the mast from being assigned to position C.? Only 23 West can be assigned to C of that crossover.? As a result, the last block for the transit would then be 23.? How do I create a section / transit that allows me to park a train in a block after the crossover; block 24?

Of course, I could create another block beyond 24, but that would require an additional block detection circuit for each end track in the layout.

What am I missing?

Thanks,
Jack Basiago
 

Have you set Buffer Stops at the end and added Buffer Stop masts?
 

Jack,

Was there a specific reason for changing from automatic SML to manual SML? Since you had created sections from the SML, changing the SML resulted in errors during JMRI startup for the sections since they were based on the automatic SML.

I would not include six of the signal masts since they don¡¯t appear to provide any value. They are 15 East, 8 East, 2 West, 4 East, 10 West and 17 West. 2 West and 4 East would be OK if the Block 3 is long enough to hold a complete train.

As a rookie with using Dispatcher, I don¡¯t use SML based sections. I create a section for each block. This provides me with maximum flexibility in creating transits.

Based on the above, I had no problems creating a transit from 20 to 24 and running a train using simulated block occupancy.


Dave

On Dec 5, 2018, at 7:12 PM, Jack Basiago <jbasiago@...> wrote:

JMRI version: 4.13.4
Java version: 1.8.0_191
MacOS: Version 10.13

I've been working on a layout that includes 6 crossovers, 3 left hand and 3 right hand. I've uploaded my layout to Full Yard with Signals. I've been able to create and place signal masts at end blocks, and turnouts on the layout. I've used the auto-generate signal pairs tool to create signal mast logic, which I ultimately had to convert to not use Layout Paths. I also created Sections from the Signal Mast pairs. The signal mast logic looks good to me. I have created auto trains that traverse the layout and return successfully.

However, when creating transits for automatic trains, I ran into one issue that I can't figure out. Because the crossovers only allow you to assign signal masts that face outside looking in, I can't create a transit that includes the block next to a crossover as a destination. For instance, if I create a transit to go from the end of 20 to the end of 24, the last block at 24 is inaccessible because there is no signal mast for 24 East, only 23 West at the open end of block 24. I could create the signal mast, but I have nowhere to attach it because the crossover prevents the mast from being assigned to position C. Only 23 West can be assigned to C of that crossover. As a result, the last block for the transit would then be 23. How do I create a section / transit that allows me to park a train in a block after the crossover; block 24?

Of course, I could create another block beyond 24, but that would require an additional block detection circuit for each end track in the layout.

What am I missing?

Thanks,
Jack Basiago
 

Lain.? Yes there are End Bumpers at every stop and each has a Signal Mast. Those Signal Masts are included in the SML and used for defining Sections.

Dave.? For your first question, I changed from automatic SML to manual SML because I was having issues running automatic SML with automatic trains.? With automatic SML, as soon as I created a train using Dispatcher, the train would start briefly, and then the signals would change to block the movement of the train.? This seems like a bug to me because as soon as I went to manual SML, it worked fine.? And as far as I can tell, the manual SML was identical to the automatic SML.? With automatic SML,?I would get an error on the console saying that the train was stopped because the next section was not allocated.? if I went into the SML logic at that point and updated it, it would clear the signal and the train would run automatically.? No clue.

Beyond that, I included the Signal Masts at those other locations so that I would have Signal Masts available to define Sections.? I guess it never occurred to me that you could have sections without signal masts.? I assumed that the sections were somehow tied into the Signal Mast Logic, probably because you can generate sections automatically, and they seem to run between signals.? ?Newbie mistake.? I'll take a look at that again and see what I can come up with. Given that, I also see now that those additional signals don't really provide value particularly if you use manual SML.? I was assuming the automatic tools under the Signal Mast Logic table would create a system for me that worked.? ?Perhaps they need a little work.? Thanks for the advice.

Thanks again,
Jack

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