# SPC Collection Model

## 1. Function Overview

The SPC Collection Model belongs to the basic module of the MES system. It is used to configure the result parameter collection points for process units, enabling real-time collection and monitoring of production process data. SPC (Statistical Process Control) is used to monitor the stability of production processes.

**Core Functions:**

- SCADA Point Binding: Configure the association relationship between process units and collection points
- Collection Parameter Management: Manage data collection parameters for collection points


**Function Screenshot**:
![SPC Collection Model Function Screenshot](/public/image_en/SPC_configuration/图片：SPC采集模型功能截图.png)



## 2. Term Explanation

| Term | Definition | Description |
|------|------------|-------------|
| SPC | Statistical Process Control | Used to monitor the stability of production processes |
| SCADA | Supervisory Control and Data Acquisition | Used for real-time data collection and monitoring |
| Data Type | Type of collected data | Including first inspection data, result data |
| Result Parameter | Result parameters of process units | Defines output data after process execution |
| First Inspection Data | First piece inspection data | Inspection data for the first product produced |


## 3. Data Model Relationship Description

### 3.1 SPC Collection Configuration Components

A complete SPC collection configuration consists of the following four elements:

```mermaid
flowchart LR
    subgraph SPC Collection Configuration Elements
        direction TB
        A[Process Unit] --> B[SPC Collection Configuration]
        C[Data Type] --> B
        D[SCADA Point] --> B
    end

    B --> E[Save to Corresponding Data Table]
```

| Element | Description | Example |
|---------|-------------|---------|
| Process Unit | Which process to configure for | Cell assembly process |
| Data Type | Business type of the data | First Inspection Data / Result Data |
| SCADA Point | Source point of the data | TEMP_001 |

### 3.2 Data Type and Data Table Mapping

The data type determines which table the data is saved to:

```mermaid
flowchart TB
    subgraph Data Type
        DT1["First Inspection Data<br/>(First Inspection)"]
        DT2["Result Data<br/>(Result Data)"]
    end

    subgraph Corresponding Data Table
        T1["First Inspection Data Table<br/>Saves first piece inspection data"]
        T2["Result Parameter Table<br/>Saves process result data"]
    end

    DT1 -->|"Data Type=First Inspection"| T1
    DT2 -->|"Data Type=Result"| T2
```

### 3.3 Collection Entry Description

SCADA data collection has only one entry interface `set_node_data`, with 4 callers:

```mermaid
flowchart TB
    subgraph SCADA Collection Entry
        A[set_node_data Interface]
    end

    subgraph Callers
        B[EdgeMange]
        C[EPS]
        D[MES Internal Call]
        E[Device Call]
    end

    B --> A
    C --> A
    D --> A
    E --> A

    style D fill:#90EE90
```

| Caller | Description | Relationship with SPC Configuration |
|--------|-------------|-------------------------------------|
| EdgeMange | Edge manager push | Does not use SPC configuration |
| EPS | EPS system push | Does not use SPC configuration |
| MES Internal Call | MES internal business call | **Uses SPC configuration** |
| Device Call | Direct device call | Does not use SPC configuration |

**This function configures the collection rules for "MES Internal Call".**

### 3.4 MES Internal Call Collection Process

When MES internal business calls the `set_node_data` interface, the SPC collection configuration determines where the data is saved:

```mermaid
sequenceDiagram
    participant MES业务 as MES Internal Business
    participant SCADA as set_node_data Interface
    participant SPC配置 as SPC Collection Configuration
    participant DB as Database

    MES业务->>SCADA: Call set_node_data<br/>Parameters: Point Code, Collected Value
    SCADA->>SPC配置: Query configuration by point code
    SPC配置-->>SCADA: Return: Process Unit, Data Type, SCADA Point
    SCADA->>DB: Save to corresponding data table based on data type
    DB-->>SCADA: Save successful
    SCADA-->>MES业务: Return result
```

### 3.5 Configuration Examples

| Configuration ID | Process Unit | Data Type | Data Table | SCADA Point |
|-----------------|--------------|-----------|------------|-------------|
| Config 1 | Cell Assembly Process | First Inspection Data | First Inspection Data Table | TEMP_001 |
| Config 2 | Cell Assembly Process | Result Data | Result Parameter Table | PRESS_001 |
| Config 3 | Formation Process | Result Data | Result Parameter Table | VOLT_001 |


## 4. SPC Collection Model Interaction Flow

### 4.1 SCADA Point Binding

#### 4.1.1 Point Binding Description

Point binding establishes the association between process units and SCADA collection points, enabling automatic collection of production data.

**Function Screenshot**:
![SCADA Point Binding List Screenshot](/public/image_en/SPC_configuration/图片：SCADA点位绑定列表截图.png)

#### 4.1.2 Add Point Binding

**Operation Steps:**

1. Go to [Production Configuration] → [SPC Collection Model] → [SCADA Point Binding]
2. Click [Add] button
3. Select the process unit to bind
4. Select or configure SCADA collection points
5. Set collection parameters
6. Click [Save] to complete point binding

**Field Description:**

| Field | Description | Required |
|-------|-------------|----------|
| Process Unit | Process unit to bind the point | Yes |
| Point Code | Point code in SCADA system | Yes |
| Point Name | Descriptive name of the point | Yes |
| Data Type | Data type of the point, e.g., "Numeric", "Switch" | Yes |
| Collection Frequency | Data collection frequency in seconds | Yes |
| Status | Enabled/Disabled | No |
| Remarks | Other supplementary information | No |

**[Important]** The point code must match the configuration in the SCADA system, otherwise data collection will fail.
**[Important]** The same point code cannot be bound to the same process unit repeatedly.

**Function Screenshot**:
![Add Point Binding Screenshot](/public/image_en/SPC_configuration/图片：新增点位绑定截图.png)

#### 4.1.3 Edit Point Binding

**Operation Steps:**

1. Go to [Production Configuration] → [SPC Collection Model] → [SCADA Point Binding]
2. Find the binding record to edit in the list
3. Click [Edit] button
4. Modify the information to update
5. Click [Save] to complete modification

**[Note]** Historical collected data is not affected.

#### 4.1.4 Delete Point Binding

**Operation Steps:**

1. Go to [Production Configuration] → [SPC Collection Model] → [SCADA Point Binding]
2. Find the binding record to delete in the list
3. Click [Delete] button
4. Confirm the delete operation

**[Note]** After deleting the point binding, subsequent data collection for this point will stop, but collected data will be retained.

#### 4.1.5 Point Binding Query

**Query Conditions:**

| Query Condition | Description |
|----------------|-------------|
| Process Unit | Filter by process unit |
| Point Code | Exact query by point code |
| Point Name | Fuzzy query by point name |
| Status | Filter by enabled/disabled status |
| Creation Time | Filter by creation time range |