Siemens SIMATIC Box PC 840, Manual

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Error Diagnosis
6-7
SIMATIC Rack PC 840 Manual
A5E00104826-03
6.7 Self-Test of the SIMATIC Rack PC 840 before Booting
When the 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 or the FAN LED lights red. Each beep code consists of 2 x 2 sequences.
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 Hex-Code
Check shutdown code Meaning