What is DeviceNet?

  • It began life as CAN technology designed for cars.
    • Cars required simple networks, and that simplicity is apparent in DeviceNet.
  • Is a low-cost, simple alternative to much more complex networks.
    • Most networks start with complexity and expand to meet Industrial Networking requirements. DeviceNet started simple and worked upward.
  • Uses unique communication processes.
    • DeviceNet includes self-diagnosis and message priority, among other things.

DeviceNet History

  • 1986: Bosch introduces CAN.
    • Robert Bosch unveils the network he created for vehicles at a conference in Detroit, Michigan.
  • Early 1990s: Rockwell, Honeywell, and Cincinatti Milacron work toward higher-level protocol.
    • Their collaboration fell through, but this alliance started work that would end in the creation of DeviceNet.
  • Rockwell creates DeviceNet.
    • Rockwell first adapted CAN to the Industrial Automation industry.
  • 1994: Rockwell releases DeviceNet for ODVA regulation.

Device Roles

  • Master Devices
    • Issue commands.
    • Control connections.
  • Slave Devices
    • Respond to commands.
    • Accept connections.