Heinzmann E-LES 30, Manual

Page: 65 / 106

13 Error Handling
KRONOS 20
57
RAM-Test Main Programme
During this test, various binary patterns are written to the RAM used by boot loader
and read out again. If at least one storage location does not contain the expected
code, the bootloader programme will switch to a condition where a communication
wth the HEINZMANN-diagnosis tool is possible. The cause of the error and the test
status can be seen in the parameters
3078
ErrRamTest
= 1 Error RAM-Test,
3800
TestStatus
= 1 Test status,
3801
TestValue1
faulty address,
3802
TestValue2
faulty test value
3803
TestValue3
faulty read back content of the address
Main Programme-Test
During this test, various binary patterns are written to the RAM used by the main
programme and read out again. If at least one storage location does not contain the
expected code, the bootloader programme will switch to a condition where a com-
munication with the HEINZMANN-diagnosis tool is possible. The cause of the error
and the test status can be seen in the parameters
3087
ErrMainCheckSum
= 1 Error main programme-Test,
3800
TestStatus
= 0 Test status
3801
TestValue1
expected check sum
3802
TestValue2
calculated check sum
In this operation status it is possible to load a new main programme.
13.4.2 Bootloader Communication
Serial communication with the bootloader can be entered into when the error output si-
gnal is given out three times shortly with a long interval. Further the the bootloader
communication status can be seen when only a few parameters, measuring and display
values are visible. In this state, errors will be reported on the one hand; on the other
hand, it serves as a starting point for downloading a new control programme (only with
DcDesk 2000). By principle, this procedure will always have to be carried out by the
bootloader.
If the system is entering the bootloader mode unforeseen, HEINZMANN
should be informed. For further error diagnosis the values for parameters
should be read out and redirected to HEINZMANN as an error description
Note