Motor Trip Logic using PLC Programming
Programmable Logic Controller (PLC) Questions and Answers This PLC is being used to start and stop an electric motor, and also to shut it down automatically if any of three...
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PLC Pump Permissive Interlocks
The following PLC program was written to control the operation of a large electric motor-driven pump. A variety of “permissive” inputs protect the pump from damage under abnormal conditions, and...
PLC Electric Motor Interlocks
Programmable Logic Controller Questions and Answers The following PLC program was written to control the operation of a large electric motor-driven pump. A variety of “permissive” inputs protect the pump...
PLC Ladder Logic Questions and Answers
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Programmable Logic Controller (PLC) Questions and Answers – 21
Allen-Bradley MicroLogix Programmable Logic Controller : Suppose we have an Allen-Bradley MicroLogix 1000 PLC and two pressure switches we need to connect to it: Determine the necessary contacts on each...
Programmable Logic Controller (PLC) Questions and Answers – 20
Programmable Logic Controllers Questions and Answers Suppose we have a PLC connected to three pushbutton switches as shown in this illustration: Sketch a Ladder Diagram program for this PLC to...
Programmable Logic Controller (PLC) Questions and Answers – 19
Programmable Logic Controller Questions and Answers Suppose we have a PLC connected to three pushbutton switches as shown in this illustration: Sketch a Ladder Diagram program for this PLC to...
Programmable Logic Controller (PLC) Questions and Answers – 18
PLC Questions and Answers Suppose we have an Allen-Bradley MicroLogix 1000 controller connected to three process switches as shown in this illustration: Determine the necessary switch actuation statuses (i.e. low...
Programmable Logic Controller (PLC) Questions and Answers – 17
Allen-Bradley Programmable Logic Controller (PLC) Questions and Answers Suppose we have an Allen-Bradley MicroLogix 1000 controller connected to three process switches as shown in this illustration: Determine the necessary switch...
Programmable Logic Controller (PLC) Questions and Answers – 16
AB Programmable Logic Controller (PLC) Questions and Answers Suppose we have an Allen-Bradley MicroLogix 1000 controller connected to three pushbutton switches as shown in this illustration: Determine the necessary switch...