|
Hello @ all!
?
I go step by step with JMRI, a formidable layout manager!
?
My question :
?
I cut my network in cantons, connected a sensor by canton, when the train passes on the canton the color of the rail on the screen changes and the signals also. OKAY !
?
But how do I set JMRI to stop a train in front of a red signal because the next block is busy?
?
I find the articles of descriptions of the cantons etc. in jmri.org; but not on the management of occupations of the cantons and slowing and stopping of trains.
?
Where can I find info / help?
?
Thank you in advance !
?
Here is the description of my system:
Digital Central: DCC ++
JMRI: 4.14 + Rd060e0b
Java: 1.8.0_211
RPI3B +
|
Hello
I try to find the good way...
Am I on the right track with this setting option?
Warrants: The Occupancy Block Tables
|
I achieve this outside JMRI, using assymetric DCC. It’s much much simpler than using JMRI to do it. The downside is not all decoders support it, which is why I use exclusively Zimo or ESU chips.
The assymetric signal is fed to the track through a relay that has the same accessory address as the signal so that Automatic Brake Control is activated when the signal is at red. No need to know which train is in the block or change any throttle settings.
Set up your signal logic correctly and it becomes impossible to drive a train unless the right route is set.
Kevin
|
Asymmetric is great. Looking at using it on a club layout
for public viewing and could be used during operations to prevent a operator
from violating the blocks assigned to him.
?
I can be setup to stop an engine from going forward but
still have reverse functional.
?
All other DCC decoders functions can still be used.
?
Dennis
|
On 2 Jul 2019, at 10:32 PM, Dennis Cherry < dbcherry@...> wrote: Asymmetric is great. Looking at using it on a club layout
for public viewing and could be used during operations to prevent a operator
from violating the blocks assigned to him.
?
I can be setup to stop an engine from going forward but
still have reverse functional.
?
All other DCC decoders functions can still be used.
With LokSound 5 decoders, there's also a "shuttle" mode available. Simply program an non-zero (seconds) value into CV249, open the throttle to desired speed and the loco will shuttle continuously between two oppositely-polarised Asymmetrical DCC sections, pausing at each end for the requested number of seconds. You still have full throttle and loco function control. A POM of CV249=0 cancels the mode.
Simple display automation for a total cost of less than $1 (ten 1N5404 diodes to build the asymmetrical modules). Extra cost for toggle switches if you want to bypass (short out) the ABC sections when unwanted.
Dave in Australia
|
Will have to check that option.
?
Have a board designed and functional with 4 asymmetric
outputs also have a 4 output extender board. Works with one set of 4 x 1 diodes.
?
Dennis
|
Dennis, On 3 Jul 2019, at 9:31 PM, Dennis Cherry <dbcherry@...> wrote:
Works with one set of 4 x 1 diodes. I'm hoping you mean 4 + 1 diodes in inverse parallel, as per <>? Dave in Australia
|
Hello @ all!
?
Thank you for the answers :-)
?
I will test my LaisDcc decoders to see if it works with them.
?
Otherwise, is it also a solution to go to the "operations" warrant" "Oblocks" options of JMRI?
|
Afraid LaisDCC decoders are very basic cheap and cheerful chips and don’t support any advanced features. They do not support assymetric DCC.
You get what you pay for is certainly true with these decoders.
|
That is why we have the "Evil Overlord" NMRA, to establish a minimum level of
preformance for all manufacturers. You buy something non-compliant, you are on
your own.
John
toggle quoted message
Show quoted text
---------- Original Message ----------
From: Kevin <jkevin.appleby@...>
Date: July 4, 2019 at 8:58 AM
Afraid LaisDCC decoders are very basic cheap and cheerful chips and don’t
support any advanced features. They do not support assymetric DCC.
You get what you pay for is certainly true with these decoders.
|
The issue is that NMRA haven’t included assymetric DCC in the standard, which is really annoying, so manufacturers aren’t forced to supply something that quite a few of us regard a very basic function that should be a no brainier to include and can’t cost more than a few pennies to add to a chip design
|
Hello @ all!
?
Thank you for the info for LaisDCC.
?
I bought these low-cost decoders just to test them. When I finish my tests they will be replaced. I don't want to open a discussion problem ;-)
?
DC braking, although more complicated to implement because of the risk of short circuits, seems to be another solution accepted by more decoders. What do you think?
?
To get back to JMRI, it seems (I haven't found out how yet) that you can follow your locomotive on the screen, so JMRI knows the position of the locomotive. Is there no possibility that JMRI, knowing the locomotive, and therefore its decoder, could send a stop command to the block?
?
Have a good day @ all
|
DC braking, although more complicated to implement because of the risk of short circuits, seems to be another solution accepted by more decoders. What do you think?
You are right about the implementation difficulties, cost and risk of shorts.
Be aware that "Brake on DC" is not the the same as the "DCC only" setting in CV29. The former respects momentum, doesn't shut down lights and sound...
Dave in Australia
|
Hello,
?
I found several diagrams concerning the "ABC" so-called "Asymmetric" braking.
?
I saw 4 diodes in a row and 1 in return.
?
But no information on the type of diodes used.
?
Can you tell me which diodes to use, thank you.
|
I found several diagrams concerning the "ABC" so-called "Asymmetric" braking.
?
I saw 4 diodes in a row and 1 in return.
?
But no information on the type of diodes used.
?
Can you tell me which diodes to use, thank you.
I use 1N5404. They are rated at 5A so not likely to blow them up. In Australia I can get them at around ten cents each.
Circuit at: <>
Dave in Australia
|
Amazon ?-? (Pack of 50 Pieces) Chanzon 1N5404 Rectifier Diode 3A 400V DO-201AD (DO-27) Axial 5404 IN5404 3 Amp 400 Volt Electronic Silicon Diodes
On Fri, Jul 5, 2019 at 4:54 AM Dave Heap < dgheap@...> wrote: I found several diagrams concerning the "ABC" so-called "Asymmetric" braking.
?
I saw 4 diodes in a row and 1 in return.
?
But no information on the type of diodes used.
?
Can you tell me which diodes to use, thank you.
I use 1N5404. They are rated at 5A so not likely to blow them up. In Australia I can get them at around ten cents each.
Circuit at: <>
Dave in Australia
|
Robert,On 5 Jul 2019, at 8:21 PM, Robert Schworm <rkschworm@...> wrote:
Amazon ?-
(Pack of 50 Pieces) Chanzon 1N5404 Rectifier Diode 3A 400V DO-201AD (DO-27) Axial 5404 IN5404 3 Amp 400 Volt Electronic Silicon Diodes
Thanks, my bad memory. Continuous rating 3A, non-repetitive surge rating 200A.If you need higher rating (e.g. Large Scales) the 6Ax series are 6A continuous. <>
Dave in Australia.
|
The NMRA does establish a minimum level of performance and asymmetric DCC is not part of it. In the specification it is marked as Optional so any decoders not having an feature such as asymmetric DCC and bidirectional communication are not non-compliant. I wonder if Lenz have a patent on asymmetrical DCC which would make it difficult for other manufacturers to implement without paying fees? I would check it but cannot find any working Lenz website at the moment!
|
?
I don't think Lenz is the only one who does asymmetric braking.?
?
The decoders known to be : Lenz silver and gold / ESU from V4 / CT from DCX-76 / Kühn from N045 / D&H / Zimo / Umelec...
|
So just about all manufacturers from Europe.
John
toggle quoted message
Show quoted text
---------- Original Message ----------
From: fcot2002@...
Date: July 5, 2019 at 10:08 AM
I don't think Lenz is the only one who does asymmetric braking.
The decoders known to be : Lenz silver and gold / ESU from V4 / CT from DCX-76
/ Kühn from N045 / D&H / Zimo / Umelec...
|
FCOT2002