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<h1>Statistiche Allarmi</h1>
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<h1 id="strutture-per-le-statistiche-degli-allarmi">Strutture per le Statistiche degli Allarmi</h1>
<p>Questa sezione descrive larchitettura dei dati utilizzati per lanalisi avanzata degli allarmi, che include il calcolo di KPI come MTTR (Tempo Medio di Riparazione) e MTBF (Tempo Medio tra i Guasti), e la gestione di classifiche (“Top Alarms”) per identificare i problemi più critici.</p>
<hr>
<h3 id="struttura-st_alarmanalytics">Struttura <code>ST_AlarmAnalytics</code></h3>
<p>Questa è la struttura “mattoncino” che contiene tutte le analisi calcolate per un <strong>singolo allarme</strong>.</p>
<table>
<thead>
<tr>
<th style="text-align:left">Nome Variabile</th>
<th style="text-align:left">Tipo Dati</th>
<th style="text-align:left">Descrizione</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left"><code>State</code></td>
<td style="text-align:left"><code>BOOL</code></td>
<td style="text-align:left">Stato attuale dellallarme (<code>VERO</code> = Attivo).</td>
</tr>
<tr>
<td style="text-align:left"><code>Count</code></td>
<td style="text-align:left"><code>DINT</code></td>
<td style="text-align:left">Conteggio totale delle occorrenze (Frequenza) di questo allarme.</td>
</tr>
<tr>
<td style="text-align:left"><code>TotalActiveTime_ms</code></td>
<td style="text-align:left"><code>LINT</code></td>
<td style="text-align:left">Tempo totale, in millisecondi, in cui questo allarme è rimasto attivo.</td>
</tr>
<tr>
<td style="text-align:left"><code>MTTR_sec</code></td>
<td style="text-align:left"><code>LREAL</code></td>
<td style="text-align:left"><strong>Tempo Medio di Riparazione</strong> (Mean Time To Repair), in secondi. Indica il tempo medio necessario per risolvere lallarme.</td>
</tr>
<tr>
<td style="text-align:left"><code>MTBF_h</code></td>
<td style="text-align:left"><code>LREAL</code></td>
<td style="text-align:left"><strong>Tempo Medio tra i Guasti</strong> (Mean Time Between Failures), in ore. Indica il tempo medio di buon funzionamento tra unoccorrenza e laltra di questo allarme.</td>
</tr>
</tbody>
</table>
<hr>
<h3 id="struttura-st_topalarmentry">Struttura <code>ST_TopAlarmEntry</code></h3>
<p>Questa struttura rappresenta una singola riga allinterno di una classifica di allarmi (“Top Alarms”). Viene usata per le due classifiche principali: quella per frequenza e quella per tempo di fermo.</p>
<table>
<thead>
<tr>
<th style="text-align:left">Nome Variabile</th>
<th style="text-align:left">Tipo Dati</th>
<th style="text-align:left">Descrizione</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left"><code>AlarmId</code></td>
<td style="text-align:left"><code>DINT</code></td>
<td style="text-align:left">LID numerico dellallarme. Un valore di <code>-1</code> indica uno slot vuoto nella classifica.</td>
</tr>
<tr>
<td style="text-align:left"><code>Value</code></td>
<td style="text-align:left"><code>LREAL</code></td>
<td style="text-align:left">Il valore utilizzato per ordinare la classifica (può essere la frequenza o il tempo totale di attività in millisecondi).</td>
</tr>
</tbody>
</table>
<hr>
<h3 id="dati-allarmi-nella-struttura-st_egress">Dati Allarmi nella Struttura <code>ST_Egress</code></h3>
<p>Infine, la struttura <code>ST_Egress</code> (dati in uscita verso lo SCADA) contiene gli array che rendono disponibili tutte queste informazioni.</p>
<table>
<thead>
<tr>
<th style="text-align:left">Nome Variabile</th>
<th style="text-align:left">Tipo Dati</th>
<th style="text-align:left">Descrizione</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left"><code>AlarmAnalytics</code></td>
<td style="text-align:left"><code>ARRAY[0..1399] OF ST_AlarmAnalytics</code></td>
<td style="text-align:left">Un array che contiene i dati analitici dettagliati per ogni singolo allarme.</td>
</tr>
<tr>
<td style="text-align:left"><code>TopAlarms_ByFrequency</code></td>
<td style="text-align:left"><code>ARRAY[0..99] OF ST_TopAlarmEntry</code></td>
<td style="text-align:left">La classifica dei 100 allarmi più frequenti.</td>
</tr>
<tr>
<td style="text-align:left"><code>TopAlarms_ByDowntime</code></td>
<td style="text-align:left"><code>ARRAY[0..99] OF ST_TopAlarmEntry</code></td>
<td style="text-align:left">La classifica dei 100 allarmi che hanno causato il maggior tempo di fermo.</td>
</tr>
<tr>
<td style="text-align:left"><code>Alarms_Packed</code></td>
<td style="text-align:left"><code>ARRAY[0..80] OF WORD</code></td>
<td style="text-align:left">Un array compatto di word per una rappresentazione rapida e a basso livello dello stato di tutti gli allarmi.</td>
</tr>
</tbody>
</table>
</div>
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<h2 class="toc-title">On This Page</h2>
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<li class="toc-item toc-level-3">
<a href="#struttura-st_alarmanalytics" class="toc-link">Struttura ST_AlarmAnalytics</a>
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<a href="#struttura-st_topalarmentry" class="toc-link">Struttura ST_TopAlarmEntry</a>
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<a href="#dati-allarmi-nella-struttura-st_egress" class="toc-link">Dati Allarmi nella Struttura ST_Egress</a>
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