Predictive diagnostic system in a programmable automaton

Diagnostic system made from observed information from a process monitored by a programmable logic controller provided with at least one processing unit to run an application program stored in storage means in the programmable logic controller, characterised in that the diagnostic system comprises:

• an observation module, stored in said storage means and run by the processing unit, collecting the observed information as input, to apply an observation processing to the observed information, in order to output a processed information representative of the observed information,
• a learning module generating a diagnostic function from several items of processed information received from the observation module during a determined time period,
• a detection module, stored in said storage means and run by the processing unit, collecting the observed information as input, to apply to the observed information a detection processing comprising the diagnostic function derived from the learning module, in order to output a diagnostic result.