Model Railroad System
2.2.1
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Block occupation detection using Azatrax MRD2Us. More...
Public Member Functions | |
MRD2_Block (name,...) | |
Constructor: initialize the block object. More... | |
occupiedp () | |
The occupiedp method returns yes or no (true or false) indicating block occupation. More... | |
propagate (aspect, from,...) | |
Method used to propagate distant signal states back down the line. More... | |
Static Public Member Functions | |
static | validate (object) |
Type validating code Raises an error if object is not either the empty string or a MRD2_Block type. More... | |
Private Member Functions | |
_entering () | |
Method for entering a block. More... | |
_exiting () | |
Method for exiting a block. More... | |
Private Attributes | |
sensor | |
MRD2 object. More... | |
forwardsignal | |
Signal object (typically a three color, one head block signal. More... | |
reversesignal | |
Signal object (typically a three color, one head block signal. More... | |
Block occupation detection using Azatrax MRD2Us.
Above is a simple diagram for using Azatrax MRD2Us for block occupation detection. The Azatrax MRD2U has two IR sensors and one can be use to test for entering a block and one for leaving a block.
Typical usage:
Four blocks in a loop:
A Schematic of the layout would look like this:
For the track work elements use "blockN occupiedp" for the track work elements' occupied command: eg Block1 would have 'block1 occupiedp' as its occupied command, that is its edit window would look like:
The other three blocks would be similar.
Then in the Main Loop, you would have:
Definition at line 51 of file MRD2_Block.tcl.
MRD2_Block::MRD2_Block | ( | name | , |
... | |||
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Constructor: initialize the block object.
Create a low level sensor object and install it as a component. Install the blocks signal (created elsewhere).
name | Name of the block object |
... | Options:
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private |
Method for entering a block.
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private |
Method for exiting a block.
MRD2_Block::occupiedp | ( | ) |
The occupiedp method returns yes or no (true or false) indicating block occupation.
MRD2_Block::propagate | ( | aspect | , |
from | , | ||
... | |||
) |
Method used to propagate distant signal states back down the line.
aspect | The signal aspect that is being propagated. |
from | The propagating block (not used). |
... | Options:
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static |
Type validating code Raises an error if object is not either the empty string or a MRD2_Block type.
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private |
Signal object (typically a three color, one head block signal.
Definition at line 72 of file MRD2_Block.tcl.
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private |
Signal object (typically a three color, one head block signal.
Definition at line 76 of file MRD2_Block.tcl.
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private |
MRD2 object.
Definition at line 68 of file MRD2_Block.tcl.