SYSTEMS PREPARATION QUESTIONS 2007 - 12
V. Ryan © 2008-2017
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The miniature train control system shown below has INPUTS and OUTPUTS. Each input and output has a number - these are listed on the diagram below. |
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Write the control sequence for the following sequence of events: Please note, when the barrier is raised/open it is ‘ON’. When the barrier is lowered/closed it is ‘OFF’. The first five stages have already been completed. |
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ANSWER | ||
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Suggest two improvements to the miniature train control system shown in the diagram above. | ||
IMPROVEMENT 1: | ||
IMPROVEMENT 2: | ||
ANSWER | ||
IMPROVEMENT 1: The system should have an audible (sound) warning as well. This would allow the drivers to hear as well as see warnings that the barrier is about to be closed.
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