User guide

eWON 500-2001-4001-4002 User Guide - Appendix
eWON 500®2001®4001®4002® Version 4_3_0 - User Guide - 10/5/05 - ©ACT'L sa - Page 228
13.5.3 Second level initialization diagnostics
When the second level initialization is requested, the eWON will also perform a self test. When the initialization ends,
the test result is displayed via the "USER" led. If the test is successful, the following pattern will be displayed on the led.
The led will flash for 200msec every 1.5 seconds. The pattern is repeated indefinitely until the eWON is manually rebooted (Power OFF/Power
ON).
If an error is detected during the test, the led will show the error code with the following pattern:
This example shows the case where error code is 2. The pattern is repeated indefinitely until the eWON is manually rebooted
(power OFF/Power ON).
The pattern starts with a short blink of 200msec indicating the pattern start, then N blinks, each during 1 second are displayed.
Then the pattern is repeated, etc.
The number of 1 second blinks is defined by the type of error detected:
13.5.4 Entering level 2 initialization without request
The eWON may enter level 2 test without request in the following case:
• If the IO CPU is not responding at boot time
In that special case you may detect the typical led blinking of the level 2 initialization, without having requested that mode.
13.5.5 What to do in case of error?
If an error is detected during the self test, run the test again to confirm the result. If test error persists,
then contact the factory for return and repair procedure.
13.5.6 Important remark
When performing a level 2 self test, it is important to let the test run until the end, if you stop the test before the end,
the flash memory may contain random data that may cause unexpected operation of the eWON when it will start.
For this reason, a self test must always be continued until the "USER" led displays the test result.
In case if trouble you can perform the level 2 initialization again to return to a normal situation.
Number of blinks Error meaning
1 RAM Test error
2 Flash erase error
3 Flash write error
4 Real Time Clock error
5 Flash identification failed
6 IO CPU not responding
Table 153: eWON USER led blinks meaning
Error pattern for code = 2
1 sec.