ControlNet Network Communication

The
ControlNet®
 network is a real-time control network that provides high-speed transport of time-critical I/O and interlocking data and messaging data. This includes the upload and download of program and configuration data on one physical-media link.
The
ControlNet®
 network is highly deterministic and repeatable and is unaffected when devices are connected or disconnected from the network. This quality results in synchronized and coordinated real-time performance.
The
ControlNet®
 network often functions as the following:
  • A substitute/replacement for the remote I/O (RIO) network because the
    ControlNet®
     network adeptly handles large numbers of I/O points
  • A backbone for multiple distributed
    DeviceNet®
     networks
  • A peer interlocking network
In the following example, these actions occur on the
ControlNet®
 network:
  • The controllers produce and consume tags.
  • The controllers initiate MSG instructions that do the following:
    • Send and receive data.
    • Configure devices.
  • The workstation is used to do the following:
    • Configure the
      ControlNet®
       devices and the
      ControlNet®
       network.
    • Download and upload projects from the controllers.
ControlNet Network

GuardLogix Controllers in a ControlNet Network

ControlNet®
 communication modules provide the following:
  • Support for messaging, produced/consumed safety and standard tags, and distributed standard I/O
  • Support the use of coax and fiber repeaters for isolation and increased distance
This example illustrates the following:
  • GuardLogix®
     controllers can produce and consume standard or safety tags between each other.
  • GuardLogix®
     controllers can initiate MSG instructions that send/receive standard data or configure devices.
    GuardLogix®
     controllers do not support MSG instructions for safety data.
  • The 1756-CN2 module can be used as a bridge, letting the
    GuardLogix®
     controller produce and consume standard and safety data to and from I/O devices.
GuardLogix Controllers in a ControlNet Network
The 1734-ACN adapter does not support POINT
Guard I/O™
 Safety modules.
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