Fault Diagnosis
Release 11/02
6-6
SIMATIC Panel PC 870 Computing Unit, Equipment Manual
6.5
Computer Unit Self-test Prior to Booting
After the PC has been turned on, a self-test (POST = Power On Self Test) is
carried out. If an error is detected during the POST, the appropriate sound
sequence (beep code) corresponding to the POST is output. The beep code
consists of 2 x 2 sequences each.
Conversion table of the beep codes using the hexadecimal representation:
Beep Tones
Hex Code
B
B
0
B
BB
1
B
BBB
2
B
BBBB
3
BB
B
4
BB
BB
5
BB
BBB
6
BB
BBBB
7
BBB
B
8
BBB
BB
9
BBB
BBB
A
BBB
BBBB
B
BBBB
B
C
BBBB
BB
D
BBBB
BBB
E
BBBB
BBBB
F
Example:
B
BBBB
BBB
BBB
Sound Sequence
3
6
Hex code
Check shutdown code
Meaning
Summary of Contents for Simatic PC Panel PC 870
Page 4: ...Chapter For your notes ...
Page 12: ...Contents Release 11 02 xii SIMATIC Panel PC 870 Computing Unit Equipment Manual ...
Page 94: ...Fault Diagnosis Release 11 02 6 10 SIMATIC Panel PC 870 Computing Unit Equipment Manual ...
Page 130: ...Hardware Information Release 11 02 7 36 SIMATIC Panel PC 870 Computing Unit Equipment Manual ...
Page 154: ...Index Release 11 02 Index 4 SIMATIC Panel PC 870 Computing Unit Equipment Manual ...