JUMO 705001 mTRON T - Central Processing Unit Operating Manual - Manual (Page 84)

6 Configuration
84
NOTE!
Internal and external errors of the PROFIBUS-DP interface are classified as fault and are
used to generate the "system fault" signal (collective fault). In addition, the errors are entered
in the event lists of the central processing unit and the multifunction panel.
CAUTION!
In case of an external fault (e. g. interface cable disconnected), the last received value is re-
tained.
Thus, there is a risk that the used value is out of date.
Therefore, it is necessary to evaluate the status of the "fieldbus error" signal. This allows to
set outputs to a safe state or to output replacement values, if applicable.