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2600T SERIES | PRESSURE TRANSMITTERS | OI/266/FF-EN REV. E
...Advanced Diagnostic Transducer Block (ADTB)
In case the training phase didn’t complete successfully, it is possible to read the reason because it didn’t success from the
ADTB_PILD_TRAINING_OUTPUT as:
• Process Instable during training
• Process not available during training
• Not good process condition for training
• Training not done
Monitoring Phase:
The algorithm performs a continuous sampling and comparison of the current process conditions noises with what memorized
during the training phase. Differences have been experienced being consequences of something bad into the process connections
to the sensor like dirty, ice and so on which tap/plug the pipe/s partially or totally.
Whenever a pipe plugging/tapping is detected, the ADTB_PILD_OUTPUT that was set to NORMAL during the monitoring phase
changes to one of the following conditions:
• Line on side H plugged
• Line on side L plugged
• Both lines H and L plugged
• An undefined line plugged
In this case also the device diagnosis is affected setting the bit Pild_Output in the RB_MAINTENANCE_ACTIVE and the specific bit
of the above detailed 4 info in the RB_EXTENDED_ACTIVE .
When one of the above conditions has been detected, there is the possibility that the process variables in output from the PRTB
continue to be produced with GOOD status.
In this way the AI blocks receiving in input the variables from the PRTB works normally and the operator could have not evidence of
the wrong conditions. For this reason it is possible make a choice in order to decide to affect or not the PRTB variables when the
plugging conditions have been detected. This selection is possible with the ADTB_PILD_AFFECT_PV variable. When it is selected to
true, and the Plugging conditions are detected, the GOOD status that would be produced in output for the PRTB_PRIMARY_VALUE,
PRTB_SECONDARY_VALUE, PRTB_TERTIARY_VALUE, PRTB_QUATERNARY_VALUE are all forced to BAD status
The PILD algorithm loses the train every time it is switched off. The algorithm is switched off automatically for every error
condition, except when the pressure violates the maximum pressure deviation and the retrain is selected.
Historical/statistical info
From this block can be also read the Minimum and Maximum values measured by the transducer of Pressure, Static Pressure and
Sensor Temperature plus the total working time and the number of device power.
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