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13 Communications Performance and Communications Load
NY-series Industrial Panel PC / Industrial Box PC Built-in EtherNet/IP Port User’s Manual (W563)
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13-
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This paragraph provides the method to adjust the device bandwidth usage for tag data links.
Precautions for Correct Use
Precautions for Correct Use
Ethernet switch must be corresponding to the maximum values of the network bandwidth, which
can be set to Controller. The maximum value of the network bandwidth for NY-series Controller
is 1,000 Mbit/s.
Ethernet Switches without Multicast Filtering
•
Is the network bandwidth usage without multicast filtering under the network bandwidth that can
be set for each node?
If any node exceeds its maximum network bandwidth that can be set, change the connections set-
tings, such as the RPI.
•
Is the usage of capacity without multicast filtering under 100% for each node?
If any node exceeds 100%, change the connections settings, such as the RPI.
•
Is the total network bandwidth usage under the network bandwidth that can be set?
If the total bandwidth usage exceeds the network bandwidth that can be set, the bandwidth of part
of the transmission path (e.g., an Ethernet switch or media converter) may be exceeded as the
result of how the network was wired (e.g., cascade connections of Ethernet switches), causing a
tag data link to operate abnormally. Check the bandwidth of the transmission path for all cascade
connections. If the bandwidth is exceeded, rewire the network or increase the bandwidth between
Ethernet switches (e.g., to 1 Gbps). If these countermeasures are not possible, change the con-
nection settings, e.g., the RPI settings, and adjust the bandwidth for all cascade connections until
the total network bandwidth is not exceeded.
Ethernet Switches with Multicast Filtering
•
Is the network bandwidth usage under the network bandwidth that can be set for each node?
If any node exceeds its maximum network bandwidth that can be set, change the connections set-
tings, such as the RPI.
•
Is the usage of capacity under 100% for each node?
If any node exceeds 100%, change the connections settings, such as the RPI.
•
Is the total network bandwidth usage under the network bandwidth that can be set?
If the total bandwidth usage exceeds the network bandwidth that can be set, the bandwidth of part
of the transmission path (e.g., an Ethernet switch or media converter) may be exceeded as the
result of how the network was wired (e.g., cascade connections of Ethernet switches), causing a
tag data link to operate abnormally. Check the bandwidth of the transmission path for all cascade
connections. If the bandwidth is exceeded, rewire the network or increase the bandwidth between
Ethernet switches (e.g., to 1 Gbps). If these countermeasures are not possible, change the con-
nection settings, e.g., the RPI settings, and adjust the bandwidth for all cascade connections until
the total network bandwidth is not exceeded.
•
Is the network bandwidth usage without multicast filtering under the network bandwidth that can
be set for each node or is the usage of capacity without multicast filtering under 100% for each
node?
If any node exceeds the maximum network bandwidth that can be set or the usage of 100%,
check whether the multicast filtering on the Ethernet switch is functioning correctly. If the number
of multicast filters on the Ethernet switch is less than the total usage of IP multicast addresses,
bandwidth overloads may occur in some paths and prevent tag data links from operating correctly
depending on the network connection (e.g., cascade connections of Ethernet switches). Calculate
the number of multicast filters required by each Ethernet switch on the network and make sure
that the number does not exceed the number of Ethernet switch multicast filters. If the number of
Ethernet switch multicast filters is not sufficient, use switches with enough multicast filters or
revise connection settings, such as the RPI settings.
13-2-3 Adjusting Device Bandwidth Usage
Summary of Contents for Sysmac NY512-1300
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