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Machine Control using DeviceNet

Machine Control using DeviceNet

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Touch Screen Controller CAN Interface Isolated DC-DC Converter Regulator Processor

Design Considerations

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Machine Control using DeviceNet

Machine Control using DeviceNet sets and monitors a variety of parameters such as temperature, pressure, and speed in manufacturing environments. The block diagram shows a high-end system which can accept commands through a touch-panel. The system can be very simple such as a dumb terminal that features few switches and LEDs, to more complex LCD based systems.

The core subsystems include:

  • Processor/Memory
    - the processor runs applications stored in memory and displays the result on the LCD panel. The OS is stored in non-volatile memory such as EE/FLASH/ROM.
  • Power Conversion
    - in most manufacturing environments, separate power-bus carries 24V to the nodes. In most cases, isolated DC-DC converters are used to step down the 24V to desired voltage levels with regulation.
  • Connectivity
    - allows the operator interface to connect to nodes on the network through DeviceNet. The protocol stack runs over the processor and CAN (Controller Area Network) and is used as physical and data-link layers.
  • User Interface
    - allows the user to monitor parameters in addition to entering commands.
  • Touch Screen
    - allows the operator to set parameters by touching the screen.

Application Notes

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