Technical data

Error Diagnostics
A-3
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
A.2 Built-In Self Test of the Computing Unit
When the computing unit is powered up, it runs a self-test (POST = Power On Self
Test). If errors are detected, the corresponding sequence of beeps (beep code) is
output. 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 BB BBB Beeps
3 6 Hex Code
Check shutdown code Meaning