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<h1>Flusso di Scambio Dati (PLC - HMI - SCADA)</h1>
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<h2 id="id-flusso-comunicazione1-sidebar_position-6-title-flusso-di-scambio-dati-plc-hmi-scada-sidebar_label-flusso-di-comunicazione-pagination_prev-null-hide_table_of_contents-true">id: flusso-comunicazione1<br>
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sidebar_position: 6<br>
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title: Flusso di Scambio Dati (PLC-HMI-SCADA)<br>
|
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sidebar_label: Flusso di Comunicazione<br>
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pagination_prev: null<br>
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hide_table_of_contents: true</h2>
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<h1 id="flusso-di-scambio-dati-plc-hmi-scada">Flusso di Scambio Dati (PLC - HMI - SCADA)</h1>
|
||
<p>Questo documento descrive il processo di scambio dati tra PLC, HMI e SCADA<br>
|
||
per la gestione del <strong>cambio ricetta</strong> e del <strong>meccanismo di heartbeat (watchdog)</strong>.</p>
|
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<hr>
|
||
<h2 id="sequence-diagram-cambio-ricetta-e-heartbeat">Sequence Diagram – Cambio Ricetta e Heartbeat</h2>
|
||
<pre class="hljs"><code>sequenceDiagram
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autonumber
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participant HMI as HMI (Operatore)
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participant PLC as PLC
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participant SCADA as SCADA
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|
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Note over HMI: Operatore abilita controllo remoto
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HMI->>PLC: RemoteControlEn = TRUE
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||
|
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Note over SCADA: Invio nuova produzione (indice ricetta, lotto, …)
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SCADA->>PLC: ProductionChangeRequest = TRUE
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PLC-->>SCADA: AckChangeRecipe = TRUE
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SCADA-->>PLC: ProductionChangeRequest = FALSE
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PLC-->>SCADA: AckChangeRecipe = FALSE
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PLC-->>HMI: AckChangeRecipeToHMI = TRUE (apri pop-up)
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alt Operatore ACCETTA
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HMI->>PLC: RecipeChangeOk = TRUE
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PLC->>PLC: Carica ricetta / aggiorna dati
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PLC-->>SCADA: RecipeChangeOK = TRUE (2s)
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else Operatore RIFIUTA (o chiude)
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HMI->>PLC: RejectRecipeChange = TRUE (o CloseMESWindow)
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PLC-->>SCADA: RecipeChangeReject = TRUE (2s)
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else Operatore POSTICIPA
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HMI->>PLC: BatchChangePopupDismiss = TRUE
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PLC->>PLC: Avvia timer 30s
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PLC-->>SCADA: RecipeChangePostpone = TRUE
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PLC-->>HMI: (allo scadere 30s) ri-apri pop-up
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end
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||
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par Heartbeat / Watchdog
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loop ogni 1s
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PLC-->>SCADA: PlcHeartbeat_Toggle (inverti bit)
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SCADA-->>PLC: ScadaHeartbeat_Echo = PlcHeartbeat_Toggle
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end
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PLC->>PLC: Se mismatch > 3s ⇒ MesCommunicationFault = TRUE
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end
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||
</code></pre>
|
||
<hr>
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<h2 id="state-diagram-macchina-a-stati-s60_recipemanagement">State Diagram – Macchina a stati (S60_RecipeManagement)</h2>
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<pre class="hljs"><code>stateDiagram-v2
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[*] --> Idle
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Idle --> Handshake_In: ProductionChangeRequest ↑
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Handshake_In --> Wait_Request_Low: AckChangeRecipe = TRUE
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Wait_Request_Low --> Popup_To_HMI: ProductionChangeRequest = FALSE, AckChangeRecipe = FALSE
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Popup_To_HMI --> Wait_Operator: AckChangeRecipeToHMI = TRUE
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state Wait_Operator {
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[*] --> AwaitChoice
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AwaitChoice --> ApplyRecipe: RecipeChangeOk = TRUE
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AwaitChoice --> RejectRecipe: RejectRecipeChange = TRUE
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AwaitChoice --> Postpone: BatchChangePopupDismiss = TRUE
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ApplyRecipe --> ReportOK: (carica/aggiorna dati)
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ReportOK --> [*]
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RejectRecipe --> ReportReject
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ReportReject --> [*]
|
||
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Postpone --> Timer30s
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Timer30s --> Popup_To_HMI: allo scadere 30s (riapri pop-up)
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}
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||
|
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note right of ReportOK
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Egress.RecipeChangeOK = TRUE (2s)
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||
end note
|
||
|
||
note right of ReportReject
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||
Egress.RecipeChangeReject = TRUE (2s)
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||
end note
|
||
</code></pre>
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sidebar_position: 6
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title: Flusso di Scambio Dati (PLC-HMI-SCADA)
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sidebar_label: Flusso di Comunicazione
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hide_table_of_contents: true</a>
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<a href="#sequence-diagram-cambio-ricetta-e-heartbeat" class="toc-link">Sequence Diagram – Cambio Ricetta e Heartbeat</a>
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<a href="#state-diagram-macchina-a-stati-s60_recipemanagement" class="toc-link">State Diagram – Macchina a stati (S60_RecipeManagement)</a>
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