Diagnostics Via Sercos Iii - Festo CPX-FB39 Description

4 Diagnostics and error handling
4.5

Diagnostics via Sercos III

Various diagnostic options are available for diagnostics via Sercos III and these can be selected by their
corresponding IDNs.
– Basic diagnostic functions (è 4.5.1 Basic diagnostic functions)
– Diagnostic basic functions with I/O-specific extensions (è 4.5.2 I/O diagnostics)
– Diagnostics acc. to the CPX standard of Festo
(è 4.5.3 I/O diagnostics with Festo-specific extensions).
4.5.1 Basic diagnostic functions
The basic diagnostic functions are supported by every Sercos device. This involves predefined status
codes being transmitted via S-0-0390. Error messages can be acknowledged by S-0-0099.
To interrogate the characteristics and chronological sequence of diagnostic messages, a
trace function is available via S-0-1303.
IDNs for the basic diagnostic function (function group diagnostics)
IDN Designation
S-0-0099 Reset Class 1 Diagnostic
S-0-0390 Diagnostic Number
S-0-1303 Diagnostic trace
S-0-1303.0.03 Diagnosis Trace State
S-0-1303.0.10 Diagnosis Trace Buffer 1
S-0-1303.0.11 Diagnosis Trace Buffer 2
Tab. 4.4
4.5.2 I/O diagnostics
I/O diagnostics involve Sercos standard diagnostics with I/O-specific extensions (e.g. channel-precise
localization).
Only the highest priority (S-0-1500.0.32) and the current (S-0-1500.0.33) diagnostic
message are displayed. If several faults occur simultaneously, a few messages are not
visible.
IDNs for I/O diagnostics (Bus Coupler function group)
IDN Designation
S-0-1500.0.02 IO Status
S-0-1500.0.32 IO Diagnosis Message
S-0-1500.0.33 Current I/O Diagnosis Message
Tab. 4.5
Festo – P.BE-CPX-FB39-EN – 1504NH – English
Explanation
Acknowledge diagnostic event
Current diagnostic event as a status code
Diagnostic record
Status of diagnostic record
Diagnostic memory 1
Diagnostic memory 2
Explanation
Current status of inputs and outputs
I/O diagnostic message with the highest
priority
Current I/O diagnostic message
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