GE GFK-1541B manual LEDs, Restart Pushbutton, Indication Function

2

LEDs

There are four LEDs on the CMM321 module. Each of these LEDs can be ON, OFF, or

BLINKING.

LED

Indication Function

OK	State of the Ethernet Interface
LAN	Traffic on the network port
FDX	Configuration of Full Duplex mode.
STAT	An exception event has occurred

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. (On module versions EF or earlier, the FDX LED is labeled "SER".)

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.

GFK-1541B Chapter 2 Installation 2-3