Omron PROFINET NX-PNC202, Руководство пользователя

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10 I/O Refreshing
NX-series PROFINET Coupler Unit User’s Manual (W623)
10-2 Com
munications Perform
ance
10
10-2-1 I/O Response
Tim
e
10-2 Communications Performance
This section describes the characteristics of PROFINET communications with PROFINET IO Devices
connected to a PROFINET IO Controller. 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 PROFINET IO Devices are participating in communications.
• No errors are being indicated at the PROFINET 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 PROFINET communications with PROFINET IO Devices
connected to a PROFINET IO Controller. 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 PROFINET IO Devices are participating in communications.
• No errors are being indicated at the PROFINET 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 PROFINET
Unit or Slave device is being used in the network.
10-2-1 I/O Response Time