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6. Socket Interface Communication ……………………………………………………… 68
6.1 Overview ………………………………………………………………………… 68
6.2 Ethernet Port Socket Interface Usage Notes………………………………………… 72
6.3 Socket Interface Information ……………………………………………………… 82
6.4 Using the Ethernet Port Socket Interface ……………………………………………84
6.5 Sample Programs …………………………………………………………………112
7. RAS Information ………………………………………………………………………122
7.1 T2N Special Relays and Registers………………………………………………… 123
7.2 Down Information …………………………………………………………………125
7.3 Remote Port Verification Request………………………………………………… 126
7.4 Remote Port Loopback (for an Ethernet Port) ……………………………………128
7.5 Time Setting ………………………………………………………………………130
7.6 RAS Information Readout …………………………………………………………132
8. Error Handling …………………………………………………………………………140
8.1 LED Display ………………………………………………………………………140
8.2 Status (error status) ……………………………………………………………… 143
8.3 T2N Special Relays and Registers …………………………………………………146
8.4 Socket Interface Information ……………………………………………………… 147
8.5 Troubleshooting ………………………………………………………………… 148
9. Installation and Wiring …………………………………………………………………163
9.1 Installation Environment and Base Unit Mounting…………………………………… 163
9.2 Network Wiring ……………………………………………………………………164
Appendix
Appendix 1 Maintenance and Inspection ……………………………………………… 169
Appendix 2 Request Code Table ………………………………………………………171
Appendix 3 Status Table ………………………………………………………………172
Appendix 4 Limitations on the T2N SEND and RECV Instructions ……………………… 175