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4. Preparing for Operation (Software)
This section describes setting up the Ethernet Port software for operation.
CAUTION
1.Chapter 4 presents information related to using the functions provided by the Ethernet Port from a T2N, including the instruction (request) format, important items that require attention, and sample programs.
Make a point of understanding the content of chapter 4 thoroughly before writing programs that use the Ethernet Port. The sample programs present basic examples of Ethernet Port usage, and should be reviewed carefully before use in an actual system.
4.1Ethernet Port Setup Flowchart (Software)
This section presents the flowchart for Ethernet Port setup.
Start
Reset the Ethernet Port
Set up the Ethernet Port parameters from the T2N.
Specify the Ethernet Port operating mode from the T2N.
End
There are two ways to reset the Ethernet Port:
∙Turn on the T2N power.
∙Apply the reset operation from a user program on the T2N. For details on these reset operations, see section 4.3, "Ethernet Port Reset."
The Ethernet Port parameters required for network transmission are set up by a user program running on the T2N. For details on these setup operations, see section 4.4, "Parameter Setup Request."
In this state, the system can handle remote port verification requests. See section 7.3, "Remote Port Verification Request." In this state, the system can respond to existence verification requests from other ports.
The Ethernet Port operating mode is set by user programs running on the T2N. For details on these operations, see section 4.5, "Operating Mode Control Requests."
In this state, the PC link and computer link protocol transmission slave port functions are operating.
(Assuming that they have not been explicitly disabled by the operating mode settings.)
Figure 4.1 Ethernet Port Setup Flowchart (Software)
Usage Recommendations
Before performing the settings described in this chapter, register the PU235N/245N as T2N I/O. The I/O type is ETHER or E/S.
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