Material flow control Central nervous system of warehouses and production supply systems

Trouble-free and efficient operation of production facilities or warehouses is essential for every company. To ensure this, a material flow control system (MFS) is absolutely essential. Its task is to coordinate all data and goods flows in production, warehousing and shipping. Its primary objective is to organize and control internal processes in such a way that the required storage and production resources are available at the right time, in the right place, in the right quantity and quality.

Hierarchically, material flow control is located between warehouse management (WMS) or the warehouse management system (WMS) and the programmable logic controllers (PLC) of the devices and has integrated control station functionalities for managing, coordinating, monitoring and controlling resources and transports as well as for organizing replenishment for order picking.

Tasks of material flow control

The central task of material flow control is the rationally thought-out handling of all relevant sub-processes in intra- and production logistics with the aim of optimizing operating costs. Material flow control primarily takes on tasks within the scope of transport management and commissioning with transport orders and coordinates the allocation of conveyor routes with conveyors. It ensures optimal routing and the best possible utilization of routes and resources, organizes replenishment for order picking and initiates a permanent inventory. The execution of transport orders, on the other hand, is the responsibility of the subordinate control system (PLC) for automatic high-bay warehouses, small parts warehouses, conveyor technology, etc.

High demands are placed on the material flow control system, particularly at peak times when systems are operated under high load and a large number of conveyors carry out transport orders in parallel: These trips must be coordinated and controlled in such a way that freed-up resources are immediately reoccupied, the system is not blocked, the goods are transported to their destination via the shortest possible route and the throughput rate is kept constant. Against this background, it is also important to prioritize orders where necessary.

In short, material flow control is responsible for the implementation of individually suitable actions and goods movements from goods receipt, through warehousing and order picking to dispatch. The material flow control system also coordinates and optimizes their sequence, continuously monitors all source/sink relations relevant to order processing and issues movement commands to the subordinate control systems (PLC) via telegram protocol (e.g. TCP/IP).

Controlled technologies

By using a material flow control system, a wide variety of technologies can be controlled without middleware. These include, for example

Forklift truck

AGV

RBG

Conveyor technology

Shuttles

Ant

Advantages of material flow control

The use of a material flow control system ensures that existing resources are utilized to the fullest extent. It also ensures a stable system and operating status. The following advantages can therefore be named for the use of a material flow control system:

  • Transmission of transport orders in real time
  • Reduction of interfaces

  • Increased planning and investment security
  • Increased efficiency in order picking, packaging and shipping

Push vs. pull principle

Pull-Principle | IGZ

Pull principle: With the pull principle, the next movement order is only triggered when a specific event requires it. For example, a container on a conveyor system only receives the next movement order (direction decision) when it encounters a switch/crossing.

Push-principle | IGZ

Push principle: With the push principle, orders are forwarded to a resource (“pushed in”). For example, in a high-bay warehouse, necessary transport orders are grouped together in an order pool and then forwarded to the respective stacker cranes (“push”). The orders are then processed one after the other according to a priority control system.

Material flow control from SAP with SAP EWM/MFS

With SAP EWM (SAP Extended Warehouse Management), one of the most powerful warehouse management and warehouse control systems in the world, SAP offers a standard software system that combines maximum functionality and comprehensive process support for all types of warehouses. One of the main components directly integrated into SAP EWM is SAP Material Flow System (SAP MFS) for material flow control. SAP MFS can be connected to one or more programmable logic controllers (PLCs) to ensure material flow. This interaction ensures smooth, safe and efficient material flow movements in automated high-bay warehouses (HRL), automated small parts warehouses (AKL) for containers, trays and trays as well as highly automated logistics and distribution centers.

Users of SAP EWM / MFS benefit from a significantly greater range of functions, which allows the automated processing of numerous work steps and tasks.

Find out more about SAP MFS as an interface between SAP EWM and PLC, its functions and benefits!

Details

Johannes Zeitler

Sales SAP EWM / TM

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