Omron CS1W-EIP21 Operation Manual page 68

Section 2-3
Checking Bandwidth Usage and Adjusting the Packet Interval (RPI)
In the Edit Connection Dialog Box, input 1.0 ms as the new packet interval
(RPI) value, and click the OK Button. The tag data link bandwidth being used
by device 192.168.250.1 (Usage of Capacity) increases to 51.67%, which
indicates that a packet interval (RPI) is set to a higher speed for this device.
In this case, the tag data link bandwidth being used by device 192.168.250.20
(Usage of Capacity) also increases (from 36.67% to 53.33%).
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