LMES Outbound Collection Logic Detailed Explanation

1. Overview

Outbound collection (Outbound) refers to the data collection and processing operations performed when a product completes the processing of a certain process and leaves the workstation. It is a key node for production progress tracking and quality control.

2. Logical Flow

2.1 Trigger Method

• Manual Trigger: The worker clicks the "Complete" button on the screen.
• Scan Trigger: Scan the product barcode or tray barcode.
• Signal Trigger: The PLC sends the processing completion signal.

2.2 Processing Steps

1. Status Check: Check if the current product status is "Processing".
2. Data Collection:
   • Read equipment parameters (temperature, pressure, torque, etc.).
   • Read material consumption information (batch number, quantity).
   • Read quality inspection results (OK/NG).
3. Business Logic Execution:
   • Pass: Update the product process status to "Completed", write the pass record, and release the next process.
   • Fail: Trigger the defect handling process (repair/scrap), lock the routing.
4. Data Persistence: Save the collection data to T_MES_ProcessData and T_MES_Trace.
5. Output Control: Send the release or intercept instruction to the PLC.

3. Code Implementation

The core logic is located in OutboundDomainService.

public async Task ProcessOutboundAsync(OutboundInput input)
{
    // 1. Validation
    var product = await _productRepository.GetAsync(input.ProductId);
    ValidateStatus(product);

    // 2. Collect Data
    var processData = MapToProcessData(input.Data);
    await _processDataRepository.InsertAsync(processData);

    // 3. Quality Check
    if (input.IsNg)
    {
        await HandleNgAsync(product, input);
    }
    else
    {
        await HandleOkAsync(product);
    }
    
    // 4. Save
    await _unitOfWork.SaveChangesAsync();
}

4. Precautions

• Data Integrity: Ensure that all mandatory collection items have been obtained before submission.
• Concurrency Control: Use optimistic locking to prevent repeated outbound operations for the same product.
• Timeout Handling: If the equipment data collection times out, a retry or manual input mechanism should be provided.