SAP Logical System
2006-09-11
今天在创建采购订单时保存不了，提示Client没有指定Logical System，记起前面创建Client 100时，并没有定义Logical System。
什么是Logical System？做什么用？
Logical System is used to identify an individual client in a system, for ALE communication between SAP systems.
What is ALE Converter?
An Application Link Enabling (ALE) converter acts as a bridge between SAP applications and another application. It receives Intermediate Documents (IDocs) from one or more of SAP applications instances and makes the converted data to that application. It also takes data from an external application, convert it to the appropriate IDoc format, and send it to SAP applications.The communication method between the SAP applications and the ALE Converter must be transactional RFC (tRFC).
帮助文档中的说明：
System in which applications run integrated on a shared data basis.
The distribution of data between systems requires that each system in the network has a unique identification. The logical system is used for this purpose.
In the SAP System the client corresponds to a logical system. You can assign a logical system to a client in the client maintenance (choose Goto -> Detail).
The logical system is relevant in the following SAP areas:
- ALE general: two or more logical systems communicate with one another.
- ALE - ALE business processes (for example, cost center accounting): definition of a system where a specific application runs. Changes to master data can only be made in this system, for example.
- Workflow objects: the logical system in which the object is located is always included in an objects key.
When maintaining the logical system, note the following:
- The logical system must be unique company-wide. It must not be used by any other system in the ALE integrated group. In a production system, the logical system must not be changed. If the logical system of a document reference is not set to initial and does not match your own, the system assumes the document is located in a different system.
Define Logical System
一个Logical System只能够被一个Client使用，因此为新建的Client指定Logical System时，必须定义一个新的Logical System。
用Transaction Code SALE，选择下面图示中的菜单
图1
接下来点击"New Entries"按钮，输入Logical System和Name，保存。当然正规的公司定义Logical System时，可能会有一套命名规则，例如用000CLNT100，前三位为SAP System Number，字符CLNT代表Client的缩写，100为Client Number。IDES中定义Client，只要不与已有的重名就行。
在保存时不知道为什么，弹出下面的提示框 
图2
我选择了Create request，在下面的对话框中只输入了描述，选择保存后生成了LZBK900002的Request。确定，Logical System就定义好了。
图3
接下来，可以在图1中选择"Assign Client to Logical System"，也可以用SCC4进入Client维护界面，为自己建立的Client指定Logical System。
由上面Logical System的描述中可以看出它在系统中的重要性，因此初学时一般的情况下不要修改已有的Logical System，以及已有Client的Logical System设置（只去维护那些自己创建的Client），否则可能会导致系统出错。
维护好Client 100的Logical System之后，就可以成功创建采购订单了。
yudi500
发表于 >2006-09-11 14:32:48 [评论 1] [浏览
0]