Siemens C79000 Z7076 C638 04 User Manual
Error Diagnosis and Reinstallation
6-7
SIMATIC Box PC 620 Operating Manual
C79000-Z7076-C638-04
C79000-Z7076-C638-04
6.8
Diagnostic Messages (Port 80)
When the SIMATIC PC is powered up, it runs a self-test (POST = Power On
Self-Test). If the POST detects a fault, it outputs the sequence of beeps (beep
code) assigned for the fault. Each beep code consists of 2 x 2 sequences.
Self-Test). If the POST detects a fault, it outputs the sequence of beeps (beep
code) assigned for the fault. Each beep code consists of 2 x 2 sequences.
In addition, the individual self-test steps are output at I/O port 80h.
Conversion table for the beep codes to hexadecimal representation:
Beeps
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
Beeps
3
6
Hexadecimal code
Check shutdown code
Meaning