Certificate in Programmable Logic Controllers (PLCs)

Learning Outcomes

• Identify the standard components used with PLC’s and describe their function to include input board, output board, central processing unit (CPU), power pack and program input system
• List the major types of PLC fault
• Explain the common logic and switching functions of a PLC to include AND, OR, NOT, TIMER, COUNTER and INTERNAL RELAY (FLAG)
• Identify the standard circuit symbols for field input devices to include push buttons, levers, trip rollers, reed switches, inductive sensors, capacitive sensors, photo-cells, relays and contactors
• Use an allocation list to determine the condition of the inputs and outputs of the PLC
• Test the operation of input devices to include push buttons, levers, trip rollers, reed switches, inductive sensors, capacitive sensors, photo-cells, relays and contactors
• Use editing functions to locate, monitor and alter elements of programs by means of a programming panel
• Locate faults using PLC programmes and documentation
• Rectify a fault in a PLC system
• Interpret the standard allocation (assignment) lists and input/output circuits associated with PLC systems
• Formulate short PLC programs in the form of ladder logic diagrams and statement list
• Construct a range of programs as specified in a supplied hardwired circuit diagram