Error Diagnosis
6-8
SIMATIC Box PC 620 Manual
A5E00131465-03
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:
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
BBB
BBB
B
Beeps
2
8
Hexadecimal code
Check system memory
Meaning
Special codes
In addition to the subsequent beep codes listed, there are the following special
codes:
3x short
If the INSERT button is pressed during system start:
the Onboard Device Installation is skipped. The Onboard
Graphics is used as standard output.
1x long 8x short
Error occurs when reading the MPI system information:
please turn to your customer support.
4x short
MPI EPROM is programmed for the first time.
1x long 5 x short
Ethernet Error: please turn to your customer support.
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