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What is the difference between internal and loconet?

Internal are things that only JMRI knows about. It can be something that is set like an Internal sensor that indicates something has happened or could be that it being set causes something else to happen. A good example would be setting a route when the Internal sensor goes set, That sensor could be on your panel and be set by the computer operator. An External sensor (anything not an Internal sensor) goes set or cleared as a result of input from a Stationary Decoder.


Hope that helps.
Walt

Thank You Walt. So if I develop the JMRI to use block sensors for signals and road crossings should I use the loconet? Have Digitrax DCS51 - SEC8C - BD4 to run on my layout. RJ

What ever you are going to use to sense the occupancy of block would be a stationary decoder. For the information to be available to JMRI it has to be sent to the computer. With a Loconet system that is accomplished by having an adapter between the loconet and the computer, I recommend a Locobuffer, others like the PR3.

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Walt

RJM,



On which should be 'Internal' and which should be 'LocoNet' (or other real
hardware).



When there is a real device that either is something you control or listen
to on the layout, those (usually sensors or turnouts) are the system things,
your case LocoNet. So the output bits on the Se8c which are either pairs of
turnouts to operate a signal or a turnout drive, those would be LT(digits)
things. The feedback or buttons on the board, those would be LS(digits)
things.



But a lot of things are not something you directly deal with on the layout,
you deal with some logical construction (signal mast) and that is an
'Internal'. So a block would be internal because you don't have a direct
device that is that block. You have other things, like sensors for occupancy
(LS) and turnouts that are part of the tracks in that block. Another is the
signal mast would be 'internal' because it is made up of signal heads. Those
heads are also internal because they are made up of two turnout addresses
(LT) which are real things.



Maybe this will help understand when one or the other. It isn't 100% but a
good starting point to know what to expect.



-Ken Cameron, Member JMRI Dev Team

www.jmri.org

www.fingerlakeslivesteamers.org

www.cnymod.com

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