478 terms ch 01

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samantha886
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201898
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478 terms ch 01
Updated:
2013-02-19 21:37:10
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478 terminology
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PLC terms for exam 1, ch 01
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  1. (1) the location in a computer’s memory where
    particular information is stored. (2) the alphanumeric value used to identify a
    specific I/O rack, module, group, and terminal location.
    address
  2. the part of a programmable controller
    responsible for reading inputs, executing the central program, and updating
    outputs. Consists of the arithmetic logic unit, timing/control circuitry,
    accumulator, scratch pad memory, program counter, address stack, and
    instruction register.
    CPU
  3. to perform a specific operation by processing
    either one instruction, a series of instructions, or a complete program.
    Execute
  4. all the physical components of a programmable
    controller, including peripherals, as opposed to the software components that
    control its operation.
    hardware
  5. a collection of plug-in modules that transmit control data
    between a PLC and field devices.
    I/O system
  6. a circuit that permits communication between a CPU and a
    field input or output device.
    interface
  7. an industry standard for representing relay
    logic control systems.
    ladder diagram
  8. a solid-state control device that can be programmed to
    control processes or machines operations. It consists of the processor, memory,
    input/output modules, the power supply, and the programming device.
    PLC
  9. a device that is used to enter the control
    program into memory and make changes to the stored program.
    programming device
  10. (1) to acquire data from a source device. (2)
    the transfer of data between devices, such as a peripheral device and the
    computer.
    read
  11. the representation of a control program or other logic in relay form.
    relay logic
  12. the process of reading all inputs, executing the control program, and updating all outputs.
    scan
  13. the programs that control the processing of data in a system.
    software
  14. circuitry designed using only integrated
    circuits, transistors, diodes, etc., without any electromechanical devices,
    such as relays.
    solid-state
  15. the process of putting information into a
    storage location.
    write

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