Advantech RS-485 user manual Hardware Diagnosis, Software Diagnosis

Troubleshooting

Diagnosis

The ADAM-5000 system provides two kinds of diagnosis: hardware diagnosis and software diagnosis to help the user detect and identify various types of system and I/O module failures.

7.1Hardware Diagnosis

When the ADAM-5000 is first powered on, the system does a self- diagnosis. The diagnosis information will be indicated on the LEDs of the system module in the following sequence:

1.The LEDs will come on according to the following sequence: PWR -> RUN -> TX -> RX,

2.Then all LEDs will go off

3.If the system self test is OK, the LEDs will follow the sequence outlined in Steps 1 and 2. If the system has some problems, the LEDs indicate errors as shown in the following table.

LED Status	Error Type
PWR LED On	Checksum error
RUN LED On	EEPROM Read/Write
	error on CPU board
TX LED On	RS-232 malfunction
RX LED On	RS-485 malfunction

7.2Software Diagnosis

The ADAM-5000 provides an ASCII command $AAE (Refer to the command set in Chapter 6) to read the status of I/O modules through the RS-232 port for field diagnosis or RS-485 port for remote diagnosis. The response of such a command is !AAFFFFFFFF (FF represents the error message of a slot from 0 to 3). The error messages are detailed in the following table:

7-2 ADAM-5000