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Under development, see OBlock Help
OBlocks may be set up manually in the OBlock Table, using a script, or automatically in a Control Panel Editor - Circuit Builder. When a Block is defined in a Layout Editor Panel, a new Block is created if one does not already exist.
In Layout Editor, Blocks are identified
by their User Name, so if a Block shown
in the Block Table is used in a Layout Editor Panel, its User
Name should not be changed here.
If you want to change the User Name of a Block used in a Layout Editor Panel, make the change in the Layout Editor, not in the Block Table.
To complete the definition of a Block, Paths and Bean
Settings must be attached to each Block.
Paths describe entry points to the Block. Each Block has one or more Paths associated with it. Sometimes a Turnout must be set a certain way to use a Path; Bean Settings carry that information. Paths and Bean Settings are set up automatically for Blocks defined in a Layout Editor Panel. They can also be set up in a script. There is currently no way to manually enter Paths or Bean Settings. Paths and Bean Settings are not shown in the Block Table, and are mentioned here only for completeness.
For use in automatically running Trains, a Length attribute and a Curvature attribute may optionally be assigned to a Block. These optional attributes are entered manually in this Table. If Trains will not be run automatically through a Block, there is no need to add these attributes.
System Name - The System Name of the Block. There is no functional requirement for a type letter in the System Name of a Block, but by convention we use 'B' for 'Block'. The default implementation is not system-specific, so a system letter of 'I' is appropriate. This leads to system names like "IB201".
User Name - The User Name of the Block. The User Name of a Block created here may be set to any text. The User Name for a Block created by Layout Editor is set by Layout Editor and should not be changed.
Value - This is the string value of whatever object the Block is carrying. Usually, this will either be a message or a Throttle object. If you modify this, it's stored in the Block as a string. There is currently no way to manually add a Throttle object to a Block from the table. More information on Block tracking
Comment - You may enter any text in this field that will help you distinguish this Block from other Blocks, or provide useful notes about its use.
Delete - Click the Delete button in any row to delete the Block in that row from the list of Blocks in the program. You must save your configuration (and any Panels present) to disk to make the deletion permanent. Deletion can not be undone. Caution: Make sure you remove all references to a Block before deleting it. JMRI will show a warning if you haven't done so. Blocks are referenced in the Paths of other Blocks, in some scripts, and in Layout Editor Panels.
To add a new OBlock, see Adding Blocks.
Back to the Blocks Help page
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