Your customer wants to implement the material flow system (MFS) to control conveyors and the automated high rack storage area. How do you connect SAP Extended Warehouse Management to communicate…

Question

Options

• AActivate the link to the subsystems using the ALE interface on the warehouse number
• BSend an IDoc through a Post Processing Framework action to the PLC.
• CDirectly integrate to the PLC using ABAP Push Channels.
• DUse an RFC adapter to connect with the TCP/IP socket server of the PLC

• A
  45% (19)
• B
  40% (17)
• C
  14% (6)

Explanation

In SAP EWM's Material Flow System, option A is correct because you must activate the subsystem link at the warehouse number level using the ALE (Application Link Enabling) interface - this is the configuration step that tells EWM a physical subsystem (PLC) exists and should be managed. Option D is correct because the actual runtime communication between EWM and the PLC uses a TCP/IP socket connection, and the RFC adapter serves as the technical bridge that enables this socket-level dialogue with the PLC's server.

Option B is wrong because IDocs and the Post Processing Framework (PPF) are designed for document-based follow-up actions within SAP workflows, not for real-time, low-latency communication with industrial hardware like PLCs. Option C is wrong because ABAP Push Channels (APC) are a WebSocket technology intended for browser-to-ABAP communication, not PLC integration - they have no role in MFS architecture.

Memory tip: Think of it as two layers - "ALE Activates, RFC Reaches." ALE activates the logical link (the configuration), and the RFC/TCP/IP adapter reaches the PLC at runtime. Any answer involving IDocs or Push Channels belongs to a different SAP domain entirely.

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