If you are changing a PCR which checks proc cl 10, then it would affect all w/t's with that proc class value, unbless you also include a check for w/t (which is not normally done).
Usually the pcr XPPF and its sub-pcr's deduct the absence hrs (using operation RTE-TSAP** for paid absences and RTE-TSAU** for unpaid absences). This will reduce the partial pay w/t's /8** w/t. Then XVAL0 will reduce the payments (like basic pay, allowances in IT 8) accordingly.
Some clients show in the payslip, the amt for unpaid absences also.