10 - 5
10 I/O Refreshing
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
10-2 Communications Performance
10
10-2-1 I/O Response Time
10-2 Communications Performance
This section describes the characteristics of EtherNet/IP communications with a Slave Terminal con-
nected to a CJ/CS-series EtherNet/IP Unit. Use this section for reference when planning operations
that require precise I/O timing.
The equations provided here are valid under the following conditions:
• All of the required Slave Terminals are participating in communications.
• No errors are being indicated at the EtherNet/IP Unit.
• Messages are not being produced in the network (from another company's configurator, for exam-
ple).
The I/O response time is the time it takes from the reception of an input signal at an NX Unit to the out-
put of the corresponding output signal at an NX Unit after being processed by the PLC’s user program.
This section describes the characteristics of EtherNet/IP communications with a Slave Terminal con-
nected to a CJ/CS-series EtherNet/IP Unit. Use this section for reference when planning operations
that require precise I/O timing.
• The equations provided here are valid under the following conditions:
• All of the required Slave Terminals are participating in communications.
• No errors are being indicated at the EtherNet/IP Unit.
• Messages are not being produced in the network (from another company's configurator, for exam-
ple).
Precautions for Correct Use
The values provided by these equations may not be accurate if another company's EtherNet/IP
Unit or Slave device is being used in the network.
This manual describes the communications with the Slave Terminal only. For details on the
CJ/CS-series EtherNet/IP Unit or overall EtherNet/IP network, refer to the CS and CJ Series
EtherNet/IP Units Operation Manual (Cat. No. W465) for more information about CJ-series
built-in EtherNet/IP port and EtherNet/IP Unit communication performance.
10-2-1 I/O Response Time
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