Festo CPX-CTEL-4-M12-5POL, Description

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5 Diagnostics and error handling
42 Festo – P.BE-CPX-CTEL-EN – 1601b – English
5.2 Diagnostic/error messages
Note
A requirement for transmission of diagnostic/error messages (if supported by the respective
fieldbus) is an existing connection to the host system
(
è
3.6 Connection with the host system) and a corresponding parameterisation of the CTEL
master module (
è
4.6 Parameters).
5.2.1 Priorities of the diagnostic/error messages
The CTEL master module differentiates between 5 error instances ( 4 I-Ports) that can cause
the diagnostic/error messages.
The error instances have different priorities in the CPX system. If several diagnostic/error messages
cannot be displayed parallel to each other on the fieldbus side, the error message with the highest
priority is displayed.
Priority Error instance Description
Highest System Error in the CTEL master module
I-Port 1 Error in the module at I-Port 1
I-Port 2 Error in the module at I-Port 2
I-Port 3 Error in the module at I-Port 3
Lowest I-Port 4 Error in the module at I-Port 4
Tab. 5.2 Priorities of the error instances
The error instances of the I-Ports are assigned standard to the outputs. If no outputs are
intended in the configuration of the CTEL master module, the error instances are assigned
to the inputs.
In the CPX terminal, the individual modules also have prioritisation. This runs from the
CPX bus node (always completely to the left) descending to the right. Modules that are
closer to the bus node thus have a higher priority than modules that are further to the
right.
Within a CPX terminal, diagnostic/error messages with reference to inputs have priority
over diagnostic/error messages of outputs. This principle of error prioritisation also finds
use in the CTEL master module in the I/O mixed operation.