GE Energy

Serial Port Status LEDs

The Serial Port Status LEDs provide a visual indication of the status for each serial communication port. For a given serial communication port:

LED Display

Status Description

 

 

TXD

Serial transmission activity on the serial port

 

 

RXD

Serial reception activity on the serial port

 

 

Notes:

If a pair of LEDs is not lit, it does not indicate a problem, only that the connected device is not active at that moment.

If a serial communication card slot is empty, (that is, no card is installed) the serial Receive (RXD) LED may be lit.

D400 Substation Data Manager User's Manual 73

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GE 994-0089 user manual Serial Port Status LEDs