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Explain the need for interfacing circuits and describe the different types of I/O for PLC interfacing inputs ports; opto-isolation digital, output ports, relay , analogue, transistors, communicatio
Describe the response time of a PLC as the delay between the input being turned on and output changing state and explain the causes of delay. Causes, mechanical response of output devices, electrical response of input device, scan update of image memory
Explain with aid of block diagrams the use of A/D and D/A convertors in PLC systems
State typical values of industrial
State typical values of industry standard analogue voltage and current input/output signals
Define the term resolution as applied to A/D and D/A converters and describe the relationship between analogue inputs/outputs and word length
Describe industrial application of PLCs in ON/OFF switching, temperature control, motor speed control, conveyor belt sequence operations
With aid of block diagrams describe the type of sensors and actuators used in given applications
Troubleshooting a typical plc system
Specifying PLC system
Describe the response time of a PLC as the delay between the input being turned on and output changing state and explain the causes of delay. Causes, mechanical response of output devices, electrical response of input device, scan update of image memory
Explain with aid of block diagrams the use of A/D and D/A convertors in PLC systems
State typical values of industrial
State typical values of industry standard analogue voltage and current input/output signals
Define the term resolution as applied to A/D and D/A converters and describe the relationship between analogue inputs/outputs and word length
Describe industrial application of PLCs in ON/OFF switching, temperature control, motor speed control, conveyor belt sequence operations
With aid of block diagrams describe the type of sensors and actuators used in given applications
Troubleshooting a typical plc system
Specifying PLC system
