If you set the same packet interval (RPI) for all the connections, the table shows that the usage rate of
allowable tag data link bandwidth is 74.50% for all the device as shown in the Usage of Capacity col-
umn, and this indicates that the shortest packet interval is 40 ms.
Method 2: Changing the Packet Intervals (RPIs) of Specific Devices
In this example, set faster tag data links for specific two devices: 192.168.250.1 and 192.168.250.10.
Click the Set Packet Interval (RPI) Button in the Usage of Device Bandwidth Dialog Box to display
the Set Packet Interval (RPI) Dialog Box.
In the T
arget Device Area, clear the check boxes for devices to which this RPI change is not applied
(all the devices except 192.168.250.1 and 192.168.250.10). Input 30 ms as the new RPI value, and
click the OK Button.
The usage rate of allowable tag data link bandwidth for each of the two devices, 192.168.250.1 and
192.168.250.10, increases to 87.00% as shown in the Usage of Capacity column, and this indicates
that the shorter RPI is set for the connections of these devices.
Note that the usage rate of allowable tag data link bandwidth for all the other devices is also increased
from 40.83% to 44.50% since they are connected with the two devices, 192.168.250.1 and
192.168.250.10.
15 Communications Performance and Communications Load
15-19
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
15-2 Adjusting the Communications Load
15
15-2-5 RPI Setting Examples
To Next Page
Loading...
Need help?
General
