Rockwell-automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual Instrukcja Użytkownika Pobierz pdf (Strona 86)

Publication 1794-UM061A-EN-P - July 2006

84 Configure your Digital Module on an EtherNet/IP Network

Choose Direct or Rack-optimized Connection

The Logix5000 controller uses connections to transmit I/O data. These

connections can be direct connections or rack-optimized connections.

Term Definition

Direct Connection A direct connection is a real-time, data transfer link between the controller and an I/O

module. The controller maintains and monitors the connection with the I/O module. Any

break in the connection, such as a module fault or the removal of a module while under

power, sets fault bits in the data area associated with the module.

Rack-optimized

Connection

For digital I/O modules, you can select rack-optimized communication. A rack-optimized

connection consolidates connection usage between the controller and all the digital I/O

modules in the chassis (or DIN rail). Rather than having individual, direct connections for

each I/O module, there is one connection for the entire chassis (or DIN rail).

A direct connection is any connection that does

not use the Rack Optimization Comm Format.

Rack-optimized Connection

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Rockwell-automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual Instrukcja Użytkownika Strona 86