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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Semester 1 Examinations 2010/
Module Title: Automation Systems
Module Code: MANU
School: Mechanical, Manufacturing, Biomedical & Facilities Engineering
Programme Title: Bachelor of Science (Honours) in Advanced Manufacturing Technology
Programme Code: CR_EAMTE_
External Examiner(s): Mr. Ger Reilly, Mr. Pat Ryan Internal Examiner(s): Michael Murray
Instructions: Answer Question ONE and TWO other questions.
Duration: 2 HOURS
Sitting: Winter 2010
Requirements for this examination:
Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the correct examination paper. If in doubt please contact an Invigilator.
Q1. (a) Figure 1 shows a system to automatically fill seeds through a metering tank. The seed contained in the silo is released through the valve (y1) when the metering tank is empty. Filling proceeds until the metering tank is full. The metering tank then empties its contents into a container through the valve (y2). When the correct quantity is placed in the container the metering tank is refilled. Once the container is filled the motor runs to place the next container for filling. The operation is controlled by switch S1, however, once a filling operation has begun it must be completed. Using a Ladder diagram write a PLC program to implement a solution. State any assumptions that you have made. [20 marks]
Figure 1: Automatic seed filling
Q4. Produce an initial design of a domestic heating system for a customer who is building a new home. Your design may consider, but is not limited to, the following topics: Sensors; Type of signals and communication used in the process; Controller design; HMI design; Actuators. Projected Costs [25 marks]
