Set Up the Material Flow System 
Use
To be able to connect up a programmable logic controller (PLC) to Extended Warehouse Management (EWM), you must make the following settings.
Procedure
Definieren ...
Customizing Settings:
1. Define PLC interface types. PLC interface types facilitate the settings for controls of a similar nature (for example, several stacker cranes with an identical interface).
For more information, see the Implementation Guide (IMG) for EWM under Master Data ® Material Flow System (MFS) ® Master Data ® Define PLC Interface Type.
2. Define a PLC in EWM for each real PLC with which EWM is to communicate.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Define Programmable Logic Controller (PLC).
3. Define one or more communication channels for each PLC.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Communication Channel ® Define Communication Channel.
4. Define communication point types. Consider whether you need a special processing for different communication points when telegrams of a certain type arrive.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Define Communication Point Types.
5. Define communication points. Each point in the system that is not a final storage bin and which EWM is to take into account as an interim step must be a communication point.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Define Communication Point.
6. Define communication point dependencies if you want to limit the capacity of communication points in EWM or record the status at communication points in EWM. In doing so, you define which other communication points are checked by EWM with regard to HUs waiting there if a communication point is relieved or its status changes to Ready.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Storage Control ® Define Communication Point Dependencies.
7. Define conveyor segments if you want to check their status or capacity in EWM.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Define Conveyor Segment.
8. Define conveyor segment group types if you use conveyor segments and want to treat them jointly with regard to their status, for example.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Define Conveyor Segment Group Type.
9. Define conveyor segment groups if you want to treat conveyor segments jointly.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Define Conveyor Segment Groups.
10. Then assign the conveyor segments to the conveyor segment groups.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Assign Conveyor Segments for Conveyor Segment Groups.
11. Flag the storage types that represent the warehouse regulated by the controls as MFS-relevant. Two storage type roles are available:
12. Prestorage area: H Material Flow Control for Automatic Storage Retrieval
13. High-rack storage area: J Automatic Warehouse (Driven by MFS).
For more information, see the IMG for EWM under Master Data ® Define Storage Type.
14. Define storage groups for layout-oriented storage control. Storage control allows you to form groups of storage bins – known as storage groups – for route determination.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Storage Control ® Define Storage Groups for Layout-Oriented Storage Control.
15. Define interim destinations for the transportation of HUs within your warehouse. You do this according to the principle: from A to Z via B, from B to Z via C. This point represents the core of your Customizing activities. You can specify source and destination either roughly (storage type only) or finely (with storage group). It is also possible to entirely do without one of the two. For example, "everything from aisle 1 - irrespective of final destination - via the intermediate location CP13" (stock removal station of aisle 1). You can also specify different paths for full, partly full, or empty HUs.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Storage Control ® Define Layout-Oriented Storage Control.
16. Define suitable activity areas. You use activity areas to control the assignment of warehouse tasks to queues. The controls defined in each case process the queues.
For more information, see the IMG for EWM under Master Data ® Activity Areas ® Activities.
17. Define an MFS queue for each PLC.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Define MFS Queue.
18. Define a resource category for each resource type used. For more information, see the IMG for EWM under Material Flow System (MFS) ® Master Data ® Define MFS Resource Category.
19. Define abbreviations for MFS actions. Define function modules that the system is to call in the case of these actions.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Telegram Processing ® Define MFS Actions.
20. Clarify the telegram structures (record structure, telegram types) with the person responsible for the PLC and create the corresponding record structures in the ABAP dictionary. You can use the Object Navigator of the ABAP Workbench for this purpose, for example.
21. Define which telegram IDs the PLC expects or uses for the intended message types and which record structures it uses in each case.
For more information, see the IMG for EWM under Interfaces ® Material Flow System (MFS) ® Telegram Processing ® Define Telegram Structure.
22. Define which action modules are to be called for which PLC telegrams.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Telegram Structure ® Find MFS Actions.
23. Define the required exceptions.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Exception Handling ® EWM Exceptions.
24. Assign PLC errors to the relevant telegram errors.
For more information, see the IMG for EWM under Material Flow System (MFS) ® Exception Handling ® Assign Telegram Errors to PLC Errors.
System Settings
1. Create storage bins for the communication points and assign these to the communication points. In doing so, ensure that the storage bins each have the correct storage group. The system determines the storage group via the interim storage bins. On the SAP Easy Access screen, choose Extended Warehouse Management ® Master Data ® Product ® Material Flow System (MFS) ® Maintain Communication Points.
2. Define sorting rules for the new storage bins. The system assigns warehouse tasks to warehouse orders. In MFS, this is always a 1:1 assignment. Nevertheless, an activity-related sort sequence is necessary for data-technical reasons. On the SAP Easy Access screen, choose Extended Warehouse Management ® Master Data ® Storage Bin ® Sort Storage Bins.
3. Create a resource for each stacker crane and assign a queue to the resource. To do so, on the SAP Easy Access screen, choose Extended Warehouse Management ® Master Data ® Material Flow System (MFS) ® Maintain MFS Resource.
4. Create a new RFC destination (TCP/IP connection). Define a program ID. You must set this in the external communication layer. The communication layer registers itself in the SAP system under this name. You can then call the communication layer from EWM.
On the SAP Easy Access screen, choose Tools ® ALE ® ALE Administration ® Runtime Settings® Maintain RFC Destination.
5. Specify for each PLC whether you want to use the SAP communication layer SAP XMII MDS for EWM or a different communication layer. Specify the name of the RFC destination and, where appropriate, the functions to be called in the external communication layer. To do so, on the SAP Easy Access screen, choose Extended Warehouse Management ® Master Data ® Material Flow System (MFS) ® Maintain Programmable Logic Controller.
6. Set the IP address and port of the communication channels. The EWM system passes on these parameters to the external communication layer when the channel is opened. The communication layer is then in this respect maintenance-free. On the SAP Easy Access screen, choose Extended Warehouse Management ® Master Data ® Material Flow System (MFS) ® Maintain Communication Channel.
7. Create a new TCP/IP connection. Enter a program ID. The external communication layer must use this to register itself in the SAP system. On the SAP Easy Access screen, choose Tools ® ALE ® ALE Administration ® Runtime Settings® Maintain RFC Destination.
8. Start the communication channels. On the SAP Easy Access screen, choose Extended Warehouse Management ® Monitoring ® Warehouse Management Monitor ® Material Flow System ® Communication Channel.
Result