Rockwell Automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Packaged Controllers Quick Start and User Manual - Manual (Page 232)

232 Publication IASIMP-QS010B-EN-P - October 2009
Chapter 4 Add Additional Local I/O
Remember that RPI reflects how quickly the I/O modules can be scanned, not
how quickly a program can use the data. The requested RPI defines the
frequency at which the controller sends and receives all I/O data on the
backplane. Each module on the backplane can have its own individual RPI
setting.
Additional Resources For more information about the expansion I/O module you are adding, see
your module’s installation instructions and user manual.
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