Pick-To-Light API

Overview

The Pick-To-Light (PTL) API provides visual guidance to the operator:

• Displays the number of items to pick on the HMI.
• Lights LED strips indicating the source compartment to pick from and the target compartment to pick into.
• The Log Publisher provides feedback through the PTL segment when the operator presses the confirm button for a specific pick operation.

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PTL Concept

The system is based on Pick-To-Light commands (showpicktolight to create a PTL and hidepicktolight to delete a PTL), which are created by the WMS.

Each PTL represents one picking operation and contains:

• Items to pick
• Source bin and compartment
• Target bin and compartment

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PTL Status

A PTL can have one of the following statuses:

• Registered: PTL is registered and waiting to become active.
• Active: PTL is active; bins are open, and display + LED strips are active.
• Confirmed: PTL is confirmed by pressing the confirm button on HMI.

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Key Rules

• The WMS can send multiple PTLs, but only one PTL is allowed per source–target port combination.
• A PTL is not activated until both the source and target bins are OPEN in their respective ports.
• Target information is optional: for putaway operations or when picking into an external tote, only the source information is required.
• The confirm button:
  • Confirms an active PTL (sets status to Confirmed).
  • Turns off the LEDs.
  • Has no effect if no PTL is active.
  • Does not automatically close bins (it only changes the PTL status), so the WMS must call closebin instead.
• Closing a port deletes all PTLs related to that port.
• Log Publisher updates reflect PTL status changes:
  • Activation (bins arrive at port)
  • Completion (confirm button pressed)

Visualization Without Confirm Button

• Closing a bin automatically deletes the active PTL for that port.
• hidepicktolight can be used instead if bins need to remain open for additional picks.

Handling WMS Disconnections

• AutoStore retains PTLs in case of disconnection between WMS and Log Publisher.
• On reconnect, the Log Publisher receives the current PTL statuses, including any Confirmed PTLs.
• Creating a new PTL for the same source–target combination overwrites the old PTL.

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Compartment Definition

The Pick-To-Light API uses compartment numbering as follows:

• Compartment Type: Code identifying size and shape of a compartment.
• Compartment ID: Identifies both the size/shape and the compartment's location inside the bin.

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Compartment ID Calculation

• Indexing starts in the top-left (north-west) corner and moves left to right (west to east) across each row.

Mapping

See the complete mapping overview below:

FusionPort™ Support

• Supported compartment types: 1, 2, 4, 5, 7, 8, 13
• Manages port orientation (North vs. South)

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NOTE:

Compartment ID 71 == 1301 and 74 == 1303 physically.