Diagnostic Messages (Port 80) - Siemens SIMATIC Box PC 620 Operating Manual

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.
In addition, the individual self-test steps are output at I/O port 80h.
Conversion table for the beep codes to hexadecimal representation:
Example:
B
3
Check shutdown code
SIMATIC Box PC 620 Operating Manual
C79000-Z7076-C638-04
Beeps
B
B
B
B
BB
BB
BB
BB
BBB
BBB
BBB
BBB
BBBB
BBBB
BBBB
BBBB
BBBB BBB BBB
6
Error Diagnosis and Reinstallation
B
BB
BBB
BBBB
B
BB
BBB
BBBB
B
BB
BBB
BBBB
B
BB
BBB
BBBB
Beeps
Hexadecimal code
Meaning
Hex-Code
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
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