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All LEDs are briefly turned ON whenever a restart is performed in the Operational state by pressing and releasing the Restart pushbutton (described below). This allows you to verify that all LEDs are operational.

See “Verifying Proper Power-Up of the Ethernet Interface” for more LED information.

Ethernet Restart Pushbutton

The Restart pushbutton serves four functions: LED test, Restart, Restart and enter Software Load state, and Restart and enter Maintenance state. These four functions behave similarly in all states except for the Software Load state. While in this state, pressing the pushbutton will cause an immediate restart into the Operational state (without performing the LED test) if the software in the Ethernet Interface has not been corrupted or erased. If the software has been corrupted or erased, pressing the pushbutton will cause an immediate restart back into the Software Load state. The following text describes Restart pushbutton behavior while not in the Software Load state.

Pressing the Restart pushbutton will disrupt Ethernet communications.

LED Test: Any time the Restart pushbutton is released all the LEDs flash ON. You should visually verify that all the LEDs go OFF and then ON at this time. Then the Interface performs either a restart, a restart and enter Software Load state, or a restart and enter Maintenance state, depending on the duration that you press the pushbutton.

Restart: Pressing the Restart pushbutton momentarily (less than 5 seconds) requests a restart of the Ethernet Interface. When the Restart pushbutton is pressed, all LEDs go out. When it is released, all LEDs flash ON, then power-up diagnostics run, and the software on the Interface is restarted into the Operational state.

Restart and Enter Software Load State: Pressing and holding the Restart pushbutton until the bottom LED (STATUS) turns ON (between 5 and 10 seconds) forces a restart and requests entrance to the Software Load state. A reload is used to install a software update into the module and is not part of normal operation. When the Restart pushbutton is pressed, all LEDs go out. After approximately 5 seconds have elapsed, the STATUS LED (bottom LED) comes ON, to indicate that the Ethernet Interface will request a reload. After the Restart pushbutton is released, all LEDs flash ON, then power-up diagnostics run, and the Ethernet Interface waits for the software load with all LEDs blinking in unison.

Note

Reloading the Ethernet Interface requires the attachment of the PC Software Loader to the Software Loader port and initiating a load with the PC Software Loader. The PC Software Loader is a separate software utility that updates the communications software in the Ethernet Interface. This utility is supplied with any updates to the Ethernet Interface software. See Appendix C, “Upgrading the Ethernet Interface Firmware”, for more information.

Note

At any time before you initiate a load with the PC Software Loader when the Ethernet Interface is in the Software Load state, you can restart the Ethernet Interface by pressing the Restart pushbutton. Pressing this pushbutton will immediately cause the board to restart. If the reload has been initiated, see Appendix C, “Upgrading the Ethernet Interface Firmware”, for more information.

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TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual– May 2002

GFK-1541B

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GE GFK-1541B manual Ethernet Restart Pushbutton