Introduction To The Bios Beep Codes; Table 13-1 Converting The Beep Codes In A Hex Display - Siemens SIMATIC PANEL PC 877 Operating Instructions Manual

13.2

Introduction to the BIOS beep codes

13.2
The device performs a self-test when it is switched on. If an error is detected during the
POST (Power On Self Test), a series of beep signals are issued. The beep tones are a code
for errors and are composed of 2 x 2 sequences.
Table 13-1 Converting the beep codes in a Hex display
Beep tones
B
B
B
B
BB
BB
BB
BB
BBB
BBB
BBB
BBB
BBBB
BBBB
BBBB
BBBB
Example
Tone sequence
Hex code
Meaning
SIMATIC Panel PC 877
Operating instructions, Release 07/2006, A5E00877780-01
B
BB
BBB
BBBB
B
BB
BBB
BBBB
B
BB
BBB
BBBB
B
BB
BBB
BBBB
B
2
Determine RAM size
Alarm, error and system messages
13.2 Introduction to the BIOS beep codes
Hex code
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
BBB BBB
8
B
13-3