User manual

Publication 1768-UM001C-EN-P - November 2007
56 Configure and Monitor I/O
Local I/O Performance
For the best local I/O performance in a 1768 CompactLogix system:
• set an individual requested packet interval (RPI) for each local 1769 I/O
module.
• use a faster RPI for time critical I/O without impacting overall 1769
I/O performance.
I/O update times do not affect overall 1768 bus performance, such as motion
performance or controller performance.
Configuring I/O
To communicate with an I/O module in your system, add the module to the
I/O Configuration folder of the controller.
When you add a module, you also define a specific configuration for the
module. While the configuration options vary from module to module, there
are some common options that you typically configure.
Add I/O modules to
the 1769 backplane.