differance between interface and conversion programs

[Former Member]

hi gurus,

what is differance between interface and conversion programs

[Former Member]

Check the thread

Cheers,

Chandru

[Former Member]

Hi,

Here is the simplest explanation.

Conversion: Whenever there is need of loading legacy data(huge data at a time) into current SAP system, we call it conversion. Baically it is one time effort. Once all the data has been loaded(during go-live) we dont need them anymore.

Interface: These are used everyday. for eg. a company receives invoices via EDI(or some other channel) everyday. You develop interfaces to load these invoices into your system from time to time. It should be noted that this is a process that happens everyday and you will need them for ever.

Hope it helps.

Vamsi

[Former Member]

hi

good

Interface: it is a program that performs communication with External system from SAP.

There are two types of interfaces:

1. Inbound Interface: External system sends the data to SAP

2. Outbound Interface: SAP sends the data to External system.

Let's take a scenario:

There are two Systems SAP ERP and Seibel CRM

Scenario1: Whenever an Order is created in Seibel CRM system it has to be transferred to SAP where the Order confirmation, Delivery and Billing will be performed. This can be enabled by using IDOC as inbound interface.

Scenario2: Whenever a New customer is Created in SAP ERP this customer data has to be transferred to Seibel CRM using Outbound IDOC / RFC.

Basically interfaces are implemented using RFC, BAPI, ALE/IDOC.

INTERFACE programs are the ones which are run at regular intervals, say weekly, monthly or even daily. Here the legacy system continues to co-exist along with SAP system, the legacy system might be useful for certain functionalities but the data might have to run thru SAP transactions for complex data maintenance at regular intervals.

Interface Program

http://help.sap.com/saphelp_erp2005/helpdata/en/64/be5b4150b38147e10000000a1550b0/frameset.htm

Conversion:

Migration of data from Legacy system before GO Live (One time data transfer).

So Conversions are always INBOUND interfaces.

Conversions are performed using Batch input(BDC), LSMW and BAPI.

CONVERSION programs are the ones which have one time usage, usually when a legacy system is being replaced by a system like SAP, then the data has to be mapped from the legacy system to SAP system. Here the data to be converted is given on a flat file & is uploaded to SAP tables mostly using LSMW only. Conversions programs are BDC,BAPI and LSMW programs in which you upload all the related tables from the flat files.Those are one time programs.

Interface programs are those programs in which you fetch the data from the application server and process on theose data.These are helpful when you have to run any program in the backgroup when the presentation server is not working.

Conversion Program

http://help.sap.com/saphelp_erp2005/helpdata/en/d3/a65a14e96911d1b401006094b944c8/frameset.htm

In Simple

CONVERSIONS : Converting Legacy System DATA into a flat file

INTERFACES : Converting Flat File into SAP

thanks

mrutyun^

[Former Member]

Hi

For your simple understanding :

Conversion : It is one way i.e you can upload the data from legacy to SAP. You cant schedule this.

Interface : It is 2 way i.e. you can upload the data from legacy to SAP and From SAP to legacy.

You can keep the schedule for this to run.

Regards

Sandeep.