Hi
This kind of requirement will be addressed through Time management.
Time Management
Configure a new Absence Type link to your PSC Group.
Define a DEDUCTION RULE for the configured Absence Type
Assign the Deduction Rule to Counting Rule
Assign the Counting Rule to the new Absence Type
Payroll
Describe new Absence Valuation for 50% in Absences
Maintain the new Absence Valuation Rule in Group Absences for Absence Valuation
Maintain the new Absence for whom 50% salary has to be processed.Else do not maintain any Absence for full salary process.