Diagnosis Via Profibus Dp; Diagnostic Steps; Overview Of Diagnostic Bytes - Festo CPX-E Series Description

2 Function
2.5

Diagnosis via PROFIBUS DP

System CPX-E supports the following diagnostics options via PROFIBUS DP in the following stages according to
IEC 61158:
– Station status (standard diagnostic information)
– Devide-related diagnostics (general, device-related status signals of the system)
– Identifier-related diagnostics (diagnostics assigned to the modules)
– Channel-related diagnostics (diagnostics assigned to the channels)
– Module number
– Channel number and input/output
– Type of diagnostics (error type and channel type)
2.5.1

Diagnostic steps

The necessary steps for performing diagnostics on the system CPX-E are explained below.
Step 1: Evaluation of the standard diagnostic information – station status 1 (diagnostic byte 1)
7 6 5 4 3 2 1 1 0
0 0 0 0 1 1 0 1
Step 2: Evaluation of the diagnostic bytes
Device-specific diagnostics è Tab. 2.9
Byte 7 ... 22:
Identifier-related diagnostics è Tab. 2.10 and 2.5.4 Identifier-related diagnosis
Byte 23 ... 29:
Channel-related diagnostics è Tab. 2.11 and 2.5.5 Channel-related diagnosis
Byte 30 ... 62:
Fig. 2.4
The diagnostic information is sent to the master system only when the diagnostic mode is activated.
In some cases, the diagnostics mode must be shut down to commission the system.
2.5.2

Overview of diagnostic bytes

Standard diagnostic information (6 bytes)
Byte Table of contents
1 Station status 1
2 Station status 2
3 Station status 3
4 Diag.Master_add
5 Ident_number – High Byte
6 Ident_number – Low Byte
Tab. 2.8
12
Bit
Station status 1
Evaluation of Bit 0 and Bit 2:
–
–
Evaluation of Bit 3:
–
Explanation
è Tab. 2.12
è Tab. 2.13
è Tab. 2.14
Address of the master parameterised by system CPX-E.
Manufacturer identifier – High Byte (0F
Manufacturer identifier – Low Byte (A3
No operating voltage present on system CPX-E,
network plug not inserted, etc.
Configuration data obtained from the master does not
agree with the configuration data from the CPX-E system.
Diagnostic message present è Step 2
Festo – CPX-E-PB-EN – 2017-07 – English
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