Additional Information
Depending on the actual operating environment, the transmission time may be longer
than the one calculated with the equations given above.
The following factors can cause longer transmission time: the load rate of the network (the de-
gree of network congestion), the window size of each network node, traf
fic load on the built-in
EtherNet/IP port (e.g., simultaneous tag data link communications), and the system configura-
tion.
CIP communications instructions are executed in the system service process.
If a timeout occurs for a CIP communications instruction, reconsider the execution time for the
system service.
15 Communications Performance and Communications Load
15-30
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
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