<elekdra.fieldblock>

Field block for bidirectional track

Description

This adds a semi automatic block implementation for a single track between stations or a bidirection track ('GWB') on a double track main line. For direction traffic use <elekdra.fieldblock_in> and <elekdra.fieldblock_out>, respectively.
On the block wire this is compatible with field block, relais block and Tf71.

Example

This adds block 'Bl' with German style 'give permission only' that does not block a route. The entry signal is 'ESig', the exit signal that is locked is the start signal of any route that terminates at route target 'RT'. Between entry signal and the station exists a track contact identified sensor 'A42'

<elekdra.fieldblock>
	<name>Bl</name>
	<contact>A42</contact>
	<blockroute>false</blockroute>
	<sendperm>true</sendperm>
	<reqperm>false</reqperm>
	<signalin>ESig</signalin>
	<route_target>RT</route_target>
</elekdra.fieldblock>

Sub tags

Tag	Description
<contact> Type: String Cardinality: once	Track contact On exit route, this triggers 'Vorblock', on entry signal showing 'go' this enables 'Rückblock'. This is a reference to the name of a <elekdra.sensor> or <elekdra.axle_occupy_sensor>
<route_request_permission> Type: boolean Cardinality: optional [0..1]	Automatic permission request This enables sending a permission request message over the block line, when the route is selected. This feature is especially helpfull when automizing the operation with AULI. Default is false
<sendperm> Type: boolean Cardinality: once	May the user give the 'permission' away? Setting this to 'true' enables a user interface operation that sends a 'permission' message over the block line and sets the local state to 'we don't have permission to send trains'.
<reqperm> Type: boolean Cardinality: once	May the user issue a request for 'permission'? Setting this to 'true' enables a user interface operation that sends a 'please give me permission' message over the block line to the other station.
<signalin> Type: String Cardinality: once	Reference of entry signal This signal has an effect on the enabling of the track contact for inbound trains. It is a reference to the name of a <elekdra.signal>
<route_target> Type: String Cardinality: once	Route target of open track This is a reference to the <name> of a <elekdra.target>. It is the route target element of the open track that this block is associated with. This <elekdra.target> must be configured in all <elekdra.route> as <routeable>! With this mechanism, the appropriate departure signal is found that is dependent of this block when a route is established that terminates at this route target.
<name> Type: String Cardinality: once	Identification The block instance is referenced on the user interface and by other configurations by this string.
<blockroute> Type: boolean Cardinality: once	Does the blocked field block inhibit setup of a route? Setting this to 'true' has the effect that the setup of a route can be stopped by the block if the block is not in the state that permits sending trains. Setting this to true might be prototypical for some older plants, but it is not desireable for efficient operation. Setting this to false also helps to establish a route without a green exit signal but than to switch on the substitutaion signal.