Festo CMMT-ST-SW, Original Instructions Manual

Page: 431 / 616

The device saves all of the messages in the volatile message directory. The device also has a non-
volatile error memory. Messages, for which the history should be traceable at a later date, are recor-
ded in the error memory. The classification of errors ensures that the response to the error by the
device can be adjusted to individual requirements. The device provides the trace function to analyse
errors and for optimisation purposes. The trace function can, for example, be used to simultaneously
record various measuring data for a diagnostic event.
Diagnostics options Brief description
On-site via LEDs The LEDs, for example, display the following:
–
Device status
– Status of the power supply
– Status of the device interfaces
– Status of the safety equipment
For additional information see "Description, assembly and install-
ation"
è
1.1 Applicable documents.
Diagnostics via the commission-
ing software The plug-in of the Festo Automation Suite, for example, provides
the following functions
è
2 CMMT-ST Plug-in:
– Access to the message directory (current messages)
– Access to the error history (message history)
– Error acknowledgment
– Error classification to categorise diagnostic events
– Recording measuring data (trace function)
Diagnostics via web server The web server offers, for example, the following functions
è
10 Web server:
– Access to the message directory (current messages)
– Access to the error history (message history)
– Error acknowledgment
Diagnostics via fieldbus
–
Request diagnostic status
– Fieldbus-specific diagnostic
functions
Special diagnostic functions and communication services are
available, depending on the fieldbus used.
Tab. 412 Diagnostics options
9.2 Classification of diagnostic events
If a diagnostic event occurs, the device issues a message and reacts according to the parameterised
severity of the diagnostic event.
The firmware, for example, cyclically monitors the temperature of the power element in the device. If a
limit value is exceeded, the firmware initially triggers the "High temperature in power unit" warning
and then triggers the "Power unit overtemperature" error message when the next limit value is
exceeded.
Diagnostics and fault clearance
431 Festo — CMMT-ST-SW — 2019-02