When Planning a Mobile Scanner Solution for Warehouse Logistics, One Question Always Arises: What Happens When the Wireless LAN (WLAN) Connection Drops? The Answer: Nothing noticeable
Stable Wireless Coverage is Standard, but…
It is clear that warehouse and production areas today can be covered very reliably with WLAN. Highly available, stable WLAN networks are standard at least indoors in intralogistics, and they form the foundation for digital mobile workflows. Through WLAN, mobile clients such as industrial handhelds or forklift terminals can communicate online and synchronously with SAP Materials Management or Warehouse Management.
So much for the theory: in practice, short-term connection interruptions can still occur. The primary reason lies in the mobility of handheld scanners. Even with optimal wireless coverage, it cannot be ruled out that a user momentarily leaves the covered area. In every warehouse, there will always be certain spots that are not ideally—or not at all—covered by WLAN. Metal rack structures or goods stored in shelf compartments can weaken signals or block them entirely.
The Most Important Features of Interruption Handling
This is where the scanner software’s interruption handling comes into play. It buffers WLAN dropouts. Ideally, the warehouse worker does not even notice that the connection has been lost in the background. They simply continue their goods receipt process or process transport orders, while the connection to the backend system e.g., SAP is automatically restored in the background.
Such interruption handling in the mobile scanner software enables later or repeated transmission of data, ensuring a smooth workflow during short offline situations.
Key aspects include:
- The so-called session in the MDE software remains active.
- The employee can continue entering data in their current workflow.
- During the connection interruption, data is temporarily stored on the mobile device.
- Data is transmitted to SAP once the device reconnects to the network.
Configuring Interruption Handling
Interruption handling can generally be configured in different ways, depending on the extent of known WLAN weak spots or usage scenarios. If it is clear that certain areas frequently or consistently lack WLAN availability, additional data e.g., for SAP picking, mobile inventory, or shipping processing can be temporarily stored on the mobile device. This allows warehouse staff to continue capturing data on the mobile device even during longer periods without an online connection. The software then transmits the data to the backend system with a delay once the connection is restored.
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