ELPRO 805U Bedienungsanleitung PDF herunterladen (Seite 47)

805U Radio Modem Module User Manual

Page 48 © April 2011

Chapter 6 TROUBLESHOOTING

6.1 Diagnostics Chart

INDICATOR

CONDITION

MEANING

OK LED OFF

Continuously

• Power supply failure

• CPU failure

OK LED ON

Continuously

• Normal Operation

Radio TX LED ON

Flashes briefly

• Radio transmitting

Radio RX LED ON

GREEN flash

RED flash

• Radio receiving data

• Weak radio signal (<-95dBm)

Serial RX LED ON

GREEN flash

RED flash

• Serial Port Receiving

• Input buffer near full

Serial TX LED ON

Flashes briefly

• Serial port transmitting

DCD LED ON

Continuously

• In transparent mode, always on.

• In controlled mode, a radio link

has been established.

The green OK LED on the front panel indicates correct operation of the unit. This LED

extinguishes on failure as described above. When the OK LED extinguishes shutdown state is

indicated. On processor failure, or on failure during startup diagnostics, the unit shuts down, and

remains in shutdown until the fault is rectified.

6.2 Test Functions

6.2.1 Radio Testing - AT&Tx

To aid in the checking and setup of the 805U unit, diagnostic functions are provided using the

standard Hayes AT commands. To perform the tests, you will need a terminal (PC + hyper-

terminal) set-up to match the module (same character type and serial speed). The table below

outlines the functions of the various tests:

AT&T Self Tests. Allows in-field diagnostics, and factory testing.

&T0 Transmit Bit Error Rate Test. Generates pseudo random data and sends out radio.

&T1 Receive Bit Error Rate Test. Receives data from &T0 module, and displays BER

statistics.

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