Solid State Interlocking
More on solid state Electronics
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The input logic to be followed by the Solid State Interlocking system can be in the shape of logical input or can be in the shape of yard layout.
For Solid State Interlocking systems with logical inputs the rules of interlocking of the yard is converted into logical expressions and after input to a computer which convert it into software to work the interlocking.
In some other systems the yard layout can be input to the computer which will generate the interlocking software from this input.
Of the two arrangements the second is free of complexity and very good for implementation of yard layout changes without loss of safety at any stage of yard layout change.
The first arrangement is less convenient from this angle and requires more input from the signal engineer. However the first arrangement helps in changes in the rules of interlocking more easily as the basic input is the logical input depending on the rules adopted for interlocking and can be changed if the rules of interlocking changes. In the second arrangement changes in rules of interlocking will be more difficult to introduce.
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