Omron Sysmac NX1P2-10 1 Series, Руководство пользователя

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Item Description
Network Total of Max. Mbit/s The total bandwidth used for tag data link communications in the entire network
is given.
Tag data links will not normally operate if the bandwidth allowed for the network
is exceeded.

Checking the Usage of Capacity and Network Bandwidth for Tag Data
Links
The usage rate of allowable tag data link bandwidth for each built-in EtherNet/IP port is given in the
Usage of Capacity (without Multicst Filter) column, and the network bandwidth usage for tag da-
ta link communications is given in the Mbit/s (without Multicast Filter) column.
The usage rate and the network bandwidth usage of tag data link communications for which multi-
cast filtering is not supported by the Ethernet switch are given in parentheses in each correspond-
ing column. These values include bandwidth usage for multicast packets since they are sent to all
the nodes without connection settings.
These values can be adjusted as described in
15-2-4 Changing the RPI on page 15-11.

Checking the Total Number of Multicast IP Addresses in the Network
When using an Ethernet switch that supports multicast filtering, there must be sufficient multicast
filters for the network. Based on the setting of connections, the Network Configurator indicates the
number of multicast IP addresses to be used in the entire network.
Make sure that the number of multicast IP addresses to be used in the entire network does not ex-
ceed the number of multicast filters supported by the Ethernet switch. If necessary, replace the
Ethernet switch with another one with sufficient multicast filters, or adjust the usage rate and net-
work bandwidth usage with the values given for an Ethernet switch without multicast filtering (i.e.,
the values in parentheses). These values can be adjusted as described in
15-2-4 Changing the RPI
on page 15-11.

Checking the Total Maximum Network Bandwidth
The Network Configurator displays the total maximum bandwidth to be used for the entire network.
This value indicates the maximum possible bandwidth for a transmission path which connects
Ethernet switches in cascade. If this value exceeds the bandwidth for each cascade connection in
the actual network (e.g., 1,000 Mbps for an NX-series CPU Unit, or 100 Mbps for an NJ-series
CPU Unit), the bandwidth for some transmission paths may be exceeded depending on the net-
work wiring, and the tag data links may not operate normally.
If this occurs, calculate the bandwidth usage of each transmission path and make sure that the
bandwidth for any cascade connection is not exceeded, or adjust the bandwidth to ensure that the
value of
Network Total of Max. Mbit/s does not exceed the bandwidth for any cascade connec-
tion. These values can be adjusted as described in 15-2-4 Changing the RPI on page 15-11.
15-2-2 Tag Data Link Bandwidth Usage and RPI
The usage rate of allowable tag data link bandwidth as given in the Usage of Capacity (without
Multicast Filter) column can be adjusted by changing the packet interval (RPI) setting.
If the RPI is set shorter, the Usage of Capacity (without Multicast Filter) will increase.
If the RPI is set longer, the Usage of Capacity (without Multicast Filter) will decrease.
The RPI can be set in one of the following ways.
15 Communications Performance and Communications Load
15-9
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
15-2
Adjusting the Communications Load
15
15-2-2 T
ag Data Link Bandwidth Usage and RPI