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356
Monitoring of DC analog measurements
•
Periodic reporting
•
Periodic reporting with dead-band supervision in parallel
•
Periodic reporting with dead-band supervision in series
•
Dead-band reporting
Users can select between two types of dead-band supervision:
•
Amplitude dead-band supervision (ADBS).
•
Integrating dead-band supervision (IDBS).
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If the changed value —compared to the last reported value— is larger than the +/- ∆ Y
predefined limits that are set by users, and if this is detected by a new measuring sample,
then the measuring channel reports the new value to a higher level. This limits the in-
formation flow to a minimum necessary. Figure 191 shows an example of periodic re-
porting with the amplitude dead-band supervision.
The picture is simplified: the process is not continuous but the values are evaluated at
time intervals depending on the sampling frequency chosen by the user (SampRate set-
ting).
After the new value is reported, the new +/- ∆ Y limits for dead-band are automatically
set around it. The new value is reported only if the measured quantity changes more
than defined by the new +/- ∆ Y set limits.
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