Difference between functions SCAN and DAQ

which are the differences and the operating mode between the functions SCAN_Start and DAQ_start.

Scan start is for scanning multiple channels - acquiring data from each channel in your scan list; DAQ_start is for scanning one channel.
For scan start you can control the time between channels. For example, you can control the tie between channels 0 and 1. You can also control the time between scans - the time between acquire data from channel 0 and 1 and the next time you acquire data from channels 0 and 1. There are several good examples for C and CVI that show off these functions. Look through your example documentation - try C:\Program Files\National Instruments\CVI70\samples\daq\Ai\DAQSingleBufAsynch.c. In the same folder you will find the ScanSingleBuf Asynch.c. Both of these calls are asychronous. They will execute in the background. You
will have to call DAQ_Check to see when the data has arrived.
What are you wanting to do?

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Difference between function module and a method?

Hi Experts
Can anybody pls tell me the technical and functional difference between function moduel and a method?
Thanks
Sudhansu

Hi,
Function modules are procedures that are defined in function groups (special ABAP programs with type F) and can be called from any ABAP program. Function groups act as containers for function modules that logically belong together. You create function groups and function modules in the ABAP Workbench using the Function Builder.
Function modules allow you to encapsulate and reuse global functions in the R/3 System. They are stored in a central library. The R/3 System contains a wide range of predefined function modules that you can call from any ABAP program. Function modules also play an important role in database updates and in remote communications between R/3 Systems or between an R/3 System and a non-SAP system.
You can declare methods in the declaration part of a class or in an interface. To declare instance methods, use the following statement:
METHODS <meth> IMPORTING.. [VALUE(]<ii>[)] TYPE type [OPTIONAL]..
               EXPORTING.. [VALUE(]<ei>[)] TYPE type [OPTIONAL]..
               CHANGING.. [VALUE(]<ci>[)] TYPE type [OPTIONAL]..
               RETURNING VALUE(<r>)
               EXCEPTIONS.. <ei>..
When you declare a method, you also define its parameter interface using the additions IMPORTING, EXPORTING, CHANGING, and RETURNING. The additions define the input, output, and input/output parameters, and the return code. They also define the attributes of the interface parameters, namely whether a parameter is to be passed by reference or value (VALUE), its type (TYPE), and whether it is optional (OPTIONAL, DEFAULT).
Unlike in function modules, the default way of passing a parameter in a method is by reference.
As in function modules, you can use exception parameters (EXCEPTIONS) to allow the user to react to error situations when the method is executed.
As in function modules, you can use the RAISE <exception> and MESSAGE RAISING statements to handle error situations.
Regards,
Sruthi

Difference between functional task and interface task

Hi All,
Kindly let me know the Difference between functional task and interface task when we create a task profile.
Regards,
Swetha

Hi Sweta,
The diferennce is Like we create different roles like store incharge and Store manager for Store manager there are list of activities that he can do like approve requests from store keeper and so on so these are Interface tasks as there are differences based on the roles of the employee but if a person can only create and not approve the transation then this is functional task difference

Difference between function module and userexit and badi

Hello Gurus,
                As a functional consultant i want to know what is function module and user exit and badi.
what is the difference between function module , user exit and badi?
regds
Ramachandra

Rama,
Function modules are ABAP routines that are administered in a central function library. They apply across applications and are available throughout the system. You must assign function modules to a function pool that is called a function group. A function group is nothing but a container for the function modules.
Business Add-Ins are a new SAP enhancement technique based on ABAP Objects. They can be inserted into the SAP System to accommodate user requirements too specific to be included in the standard delivery. Since specific industries often require special functions, SAP allows you to predefine these points in your software.
User exit - A user exit is a three character code that instructs the system to access a program during system processing.
SXX: S is for standard exits that are delivered by SAP.   XX represents the 2-digit exit number.
UXX: U is for user exits that are defined by the user. XX represents the 2-digit exit number .
Difference between BADI and USER-EXIT.
    i) BADI's can be used any number of times, where as USER-EXITS can be used only one time.
       Ex:- if your assigning a USER-EXIT to a project in (CMOD), then you can not assign the same to other project.
    ii) BADI's are oops based.
Hope this helps you.
Rgds
Manish

Difference between Function Module and Routine

Hi,
I am zero at ABAP Skill.
Can any one explain me what is the difference between Routine in BW and Function Module .
Thanks

Hi,
well basically it is almost the same. Both have a defined interface. You can pass variables to them and they can return variables. They can also change parameters... The main difference is, that a routine (form routine) can be used within the program where it is defined only and a function module can be used in all programs, form routines.
regards
Siggi

Difference Between Function Module And BAPI

Hi Friends,
What is the technical difference between BAPI and Function Module (Normal, RFC and update)?
When do we use BAPI and FM?
If BAPI is also RFC enabled then why do we have RFC function module?
Kindly clarify with examples.
Regards,
Pradeep Singh Dhadwal

Hi Pradeep,
BAPI vs FM
Difference between FM and BAPI
BAPI stands for Business API(Application Program Interface).
A BAPI is remotely enabled function module
ie it can be invoked from remote programs like standalone JAVA programs, web interface etc..
You can make your function module remotely enabled in attributes of Function module but
A BAPI are standard SAP function modules provided by SAP for remote access.
Also they are part of Businees Objest Repository(BOR).
BAPI are RFC enabled function modules. the difference between RFc and BAPI are business objects.
You create business objects and those are then registered in your BOR (Business Object Repository)
which can be accessed outside the SAP system by using some other applications (Non-SAP) such as VB or JAVA.
FM
Normal FM used internally inside SAP.
Hope this helps,
Manish

Difference between function module and subroutines

hey all...
can u pls explai me the exact difference between subroutines and function modules...
also, when is a sub routine used and also when is a function module used..???
regards..
vishal

Hi Vishal,
Basically they do the same thing and purpose is almost same but tecnically the are way apart:
Function modules must belong to a pool called a function group.
They possess a fixed interface for data exchange. This makes it easier for you to pass input and output parameters to and from the function module.
For example, you can assign default values to the input parameters. The interface also supports exception handling. This allows you to catch errors and pass them back to the calling program for handling.
They use their own memory area. The calling program and the function module cannot exchange data using a shared memory area - they must use the function module interface. This avoids unpleasant side effects such as accidentally overwriting data.
You call a function module by its name (which must be unique) in a CALL FUNCTION statement.
and also
Unlike subroutines, you do not define function modules in the source code of your program. Instead, you use the Structure link Function Builder.
Check this link too
Re: Regarding difference between Subroutines and Function modules
Hope this helps you,
Regards
Amit
Message was edited by: Amit Kumar

What is the difference between function groups and Object Orientation

Hello all
I have read about this on the help.sap.com site, I still do not understand it completely, can some one explain me with a simple example please ? (Not the increment counter example please !).
Thanks a ton.
Rgds
Sameer

Hello Sameer
When you call a module of a function group for the first time in your program then the entire function group is loaded. However, this can happen only once within your report and all global variables within the function group will have the same values all the time (except they are manipulated via fm's).
In contrast, you can create as many instances of the same class as you want and all of them can have different global attributes. And all these instances are independent of each other.
On the other hand, if fm_A changes global attributes of the function group and fm_B reads these attributes then fm_B read the changed values.
Or in other words:
Function Group = can be instantiated only ONCE
Class = can be instantiated unlimited
Regards
Uwe

Difference between Function module and a subroutine

hi
In the case of subroutine i can access the global workarea values.
I want to know whether in the case of function module
whether
i can follow the same procedure to access the workarea values
or
i have to pass this workarea values as an import or tables parameter to the function module and then use it
(in first case whether that workarea to make global whether i have to place it in function pool please check this but which is better one)
Thx in advance for any replies.

Yes
You would have to pass the values as import parameters to access the global variables of the program otherwise you will not be able to get the values of the global variable from inside the program.
Another solution would be to export to SAP memory but the entire concept of modularization of using the FM would be lost.

Diff between Function Module and subroutine

sir,
explain the difference between Function Module and Subroutine.

Hi Sandeep,
Subroutines:
Subroutines are procedures that you can define in any ABAP program and also call from any program. Subroutines are normally called internally, that is, they contain sections of code or algorithms that are used frequently locally. If you want a function to be reusable throughout the system, use a function module.
Function Modules:
Function modules are procedures that are defined in function groups (special ABAP programs with type F) and can be called from any ABAP program. Function groups act as containers for function modules that logically belong together. You create function groups and function modules in the ABAP Workbench using the Function Builder.
Function modules allow you to encapsulate and reuse global functions in the R/3 System. They are stored in a central library.
Unlike subroutines, you do not define function modules in the source code of your program. Instead, you use the Function Builder.
Regards,
Sunil

Difference between abap object and function

hi all,
i read the book on abap object of the difference between abap object and classical abap.
i know that there is only 1 instance of a specific function group but somehow i still not so clear why subsequent vehicle cannot use the same function. i also can use the do and loop to call the function? if cannot then why?
hope can get the advice.
thanks
using function *********
function-pool vehicle.
data speed type i value 0.
function accelerate.
speed = speed + 1.
endfunction.
function show_speed.
write speed.
endfunction.
report xx.
start-of-selection.
*vehicle 1
call function 'accelerate'.
call function 'accelerate'.
call function 'show_speed'.
*vehicle 2
*vehicle 3
*****abap object*******
report xx.
data: ov type ref to vehicle,
         ov_tab type table of ref to vehicle.
start-of-selection.
do 5 times.
create object ov.
append ov to ov_tab.
enddo.
loop at ov_tab into ov.
do sy-tabix times.
call method ov->accelerate.
enddo.
call method ov->show_speed.
endloop.

Hi
Now try this:
REPORT ZTEST_VEHICLEOO .
PARAMETERS: P_CAR   TYPE I,
            P_READ TYPE I.
*       CLASS vehicle DEFINITION
CLASS VEHICLE DEFINITION.
PUBLIC SECTION.
    CLASS-DATA: MAX_SPEED   TYPE I,
                MAX_VEHICLE TYPE I,
                NR_VEHICLES TYPE I.
    CLASS-METHODS CLASS_CONSTRUCTOR.
    METHODS CONSTRUCTOR.
    METHODS ACCELERATE.
    METHODS SHOW_SPEED.
    METHODS GET_SPEED EXPORTING E_SPEED TYPE I.
PRIVATE SECTION.
    DATA: SPEED      TYPE I,
          NR_VEHICLE TYPE I..
ENDCLASS.
*       CLASS vehicle IMPLEMENTATION
CLASS VEHICLE IMPLEMENTATION.
METHOD CLASS_CONSTRUCTOR.
    NR_VEHICLES = 0.
ENDMETHOD.
METHOD CONSTRUCTOR.
    NR_VEHICLES = NR_VEHICLES + 1.
    NR_VEHICLE = NR_VEHICLES.
ENDMETHOD.
METHOD ACCELERATE.
    SPEED = SPEED + 1.
    IF MAX_SPEED < SPEED.
      MAX_SPEED   = SPEED.
      MAX_VEHICLE = NR_VEHICLE.
    ENDIF.
ENDMETHOD.
METHOD SHOW_SPEED.
    WRITE: / 'Speed of vehicle nr.', NR_VEHICLE, ':', SPEED.
ENDMETHOD.
METHOD GET_SPEED.
    E_SPEED = SPEED.
ENDMETHOD.
ENDCLASS.
DATA: OV     TYPE REF TO VEHICLE,
      OV_TAB TYPE TABLE OF REF TO VEHICLE.
DATA: V_TIMES TYPE I,
      FL_ACTION.
DATA: V_SPEED TYPE I.
START-OF-SELECTION.
DO P_CAR TIMES.
    CREATE OBJECT OV.
    APPEND OV TO OV_TAB.
ENDDO.
LOOP AT OV_TAB INTO OV.
    IF FL_ACTION = SPACE.
      FL_ACTION = 'X'.
      V_TIMES = SY-TABIX * 2.
    ELSE.
      FL_ACTION = SPACE.
      V_TIMES = SY-TABIX - 2.
    ENDIF.
    DO V_TIMES TIMES.
      CALL METHOD OV->ACCELERATE.
    ENDDO.
    CALL METHOD OV->SHOW_SPEED.
ENDLOOP.
SKIP.
WRITE: / 'Higher speed', VEHICLE=>MAX_SPEED, 'for vehicle nr.',
            VEHICLE=>MAX_VEHICLE.
SKIP.
READ TABLE OV_TAB INTO OV INDEX P_READ.
IF SY-SUBRC <> 0.
    WRITE: 'No vehicle', P_READ.
ELSE.
    CALL METHOD OV->GET_SPEED IMPORTING E_SPEED = V_SPEED.
    WRITE: 'Speed of vehicle', P_READ, V_SPEED.
ENDIF.
Try to repeat this using a function group and I think you'll undestand because it'll be very hard to do it.
By only one function group how can u read the data of a certain vehicle?
Yes you can create in the function group an internal table where u store the data of every car: in this way u use the internal table like it was an instance, but you should consider here the example is very simple. Here we have only the speed as characteristic, but really we can have many complex characteristics.
Max

What are the differences between ECC5.0 and 6.0 new GL functionality

Hi Experts,
What are the differences between ECC5.0 and 6.0 new GL functionality.
If we want to implement IFRS, I think New GL functionality is very helpful, but why sap is recommending only for ECC6.0 new GL functionality, Eventhough this functionality is available in ECC5.0.
Best Regards,
Dharani

Dear,
ECC 5.0 vs. ECC 6.0/SAP ERP 6.0
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Transfer prices
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Chintan Joshi.

What are the functional differences between the iPhone and the iPod Touch, barring of course the differences in service requirements.

What are the functional differences between the iPhone and the iPod Touch, barring of course the differences in service requirements.

For one, their form factors are slightly different as the iPhone has a bit more squarish body whereas the iPod Touch has a tapered back to it.
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each models specs on Apple's online store.
See here for a better explanation.
http://en.wikipedia.org/wiki/IPod_Touch#Comparison_to_the_iPhone
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Key functional differences between SRM 7 and SRM 5

Dear All,
I urgently need to put togther a comparison document thst list key functional differences between SRM 7 and SRM 5.
NB. i donot have access to service marketplace.
sheena.roberts(AT)yahoo
Thanks
Edited by: Sheena Roberts on Jan 18, 2011 11:21 AM

Hi Sheena,
Go to difference between srm 5.0 and 7.0
Regards
Vishal Pd

What is the difference between function and method

Hey I need help I dont know which is the difference between function and method ?
Does anybody can ask me this question.
Thanks

jverd wrote:
The first two answers were also correct.Also the blocked message, quoted here for posterity:
"Tinkerbell" wrote:
Methods are defined by Java whereas functions are not. ~

Difference between functions SCAN and DAQ

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