Screening Operator Group

The Screening Operator component is used to simulate a group of operators who manually deliver a screening of products travelling through an XRay machine.

Screening Operators can operate at Level 2 and/or 3.

• Level 2: When a product travels through XRay, and the XRay marks the product as Rejected, the product XRay picture is presented electronically to a Level 2 Screening operator who can further analyse the picture and deliver a Level 2 screening result.
• Level 3 Screening operator screen products arriving on specific conveyors, deliver a Level 3 screening result, and drop the product on another conveyor once the product has been screened and identified (optional).

Create a Screening Operator

From the Toolbox, simply drag and drop a Screening Operator Group into the simulation.

Access a Screening Operator Group

In Project Explorer, click on Equipments > Screening Operator and select the group.

Screening Operator Properties

• Name: name of the group
• Number of Operators: number of operator in the group
• Lateral Offset: Lateral offset value applied to a product before being dropped.
• Level 2 Properties:
  • Level 2 Active: True if Operators screen products at Level 2
  • XRay Machines: list of XRay machines sending XRays of products to the operators
  • Level 2 Reject Rate: Percentage of products rejected at level 2.
  • Level 2 Min/Max/Mean Screening Time (seconds): time to deliver level 2 screening result (normal distribution).
  • Level 3 Timout: Maximum time allowed for Level 3 operator (if active and Screening Mode set to ScreenInPlace) to provide a screening result. The Level 2 operator will set the Level 3 screening result to "Timeout". If Level 3 operator is not active, all products will be either cleared or rejected (no timeout).
  • Busy Level 2 Operators (read only): number of operators currently screening a product at Level 2
  • Last Level 2 Screening Result (read only): screening result of the last bag screened
  • Last Level 2 screening time (read only, seconds): time to deliver the last level 2 screening result
• Level 3 Properties
  • Level 3 Active: True if operator screen at Level 3
  • Handle From: list of conveyors where operators pick the products from
  • Move To: list of conveyors where the operator drop the products after screening them at Level 3.
  • Screening Rule: rule used to determine if products should be screened or not.
  • Screening Mode: The screening behaviours. It can be:
    • ScreenAndMove: Products are picked up from the conveyor listed in Handle From property, and put back to the conveyor listed in Move To property after screening.
    • ScreenInPlace: Products are screened on the conveyor listed in Handle From property without moving them.
    • ScreenIn Line: Products are screened after Level 2 screening finished and the result is Reject.
  • Min/Max/Mean Level 3 screening Time (seconds)
  • Level 3 Reject Rate: percentage of products rejected at Level 3
  • Identify Products: if True, operators will set the screened products to "Identified"
  • Busy Level 3 Operator (read only): number of operators currently screening a product at Level 3
  • Last level 3 Screening Result (read only, seconds): duration of the last screening at Level 3