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Diagnostics
Page 63 of 87
5.
DIAGNOSTICS
5.1.
LEDS
The PLX51-DF1-ENI provides three LEDs for diagnostic purposes as shown below.
Figure 5.1 - PLX51-DF1-ENI front view
LED
Description
Module
The Module LED provides information regarding the system-level operation of the
module. If the LED is red, the module is not operating correctly. For example, if the
module application firmware has been corrupted or there is a hardware fault the
module will have a red Module LED.
If the LED is green, then the module has booted and is running correctly.
Activity
The Activity LED is used for the RS232 serial port. Thus, every time a successful DF1
packet was received, the LED will toggle green. The LED toggles red if a corrupted
packet was received (eg. failed checksum).
Ethernet
The Ethernet LED lights up when an Ethernet link has been detected (by plugging in a
connected Ethernet cable). The LED flashes every time traffic was detected.
Table 5.1 - Module LED operation