period means which screen you want to have ie Weekly or Daily or bi weekly, and here is the connection depending upon what you enter above Enter the number of times users can scroll using the current data entry profile. Examples You have entered the period type Weekly data entry with 2 periods. You have set the Lower limit relative to 2. In this case, users can scroll up to four weeks back from the start date of the data entry period. Dependencies Note that a higher value in the Lower limit relative field can slow down system performance, as the number of records that the system must read from the database is also higher. Now CATS web dynpro is little different when compared to CAT2 in terms of navigation. The user can see data for all the periods if upper limit and lower limit values are blank. If you want to prevent user from changing the data in the past/future period even though upper and lower limits are blank then you can make use of the user exit CATS0003 (Validate Recorded Data)
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