Changing The Rpi - Omron SYSMAC CJ1W-EIP21 Operation Manual

Adjusting the Communications Load

10-2-4 Changing the RPI

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• Is the network bandwidth usage without multicast filtering under 100
Mbps for each node or the usage of capacity without multicast filtering
under 100% for each node? (These appear as "Mbit/s" and "Usage of
Capacity" in the dialog box shown on page 269.)
→ If the total bandwidth usage exceeds 100 Mbps, the bandwidth of part
of the transmission path (e.g., a switching hub or media converter) had
been exceeded as the result of how the network was wired (e.g., switch
hub or cascade connection), causing a tag data link to operate abnor-
mally. Check the bandwidth of the transmission path for all cascade con-
nections. If the bandwidth is exceeded, rewire the network or increase the
bandwidth between switching hubs (e.g., to 1 Gbps). If these countermea-
sures are not possible, change the connection settings, e.g., the RPI set-
tings, and adjust the bandwidth for all cascade connections until the total
network bandwidth is not exceeded.
You can check the usage of capacity offline without multicast filtering against
the tag data link's allowable bandwidth by following the procedures in 10-2-1
Checking Bandwidth Usage for Tag Data Links. The usage of capacity without
multicast filtering can be adjusted against the tag data link's allowable band-
width by changing the packet interval (RPI). If the required communications
performance cannot be achieved by changing the settings, reevaluate the net-
work starting with the network configuration.
1. Make the required settings in the Network Configurator's Network Config-
uration Window.
2. Click the Detail Button in the Usage of Device Bandwidth Area at the bot-
tom of the Network Configuration Window.
The Usage of Device Bandwidth Dialog Box will be displayed.
Section 10-2