How to default Other Period value to yesterday in SAP ABAP HR in Background Job

[svasi_08]

If we are running foreground we can simply put logic in initialization as :

PNTIMER6 = SY-DATUM - 1.

In background how can we default the value to Yesterday ?

I went to selection-attributes dont find any thing except TVARVC Table maintenance.

What logic should I maintain in TVARV I put as simply sy-datum - 1 in field value which is wrong agian.