There is no guarantee you will see an S set at a certain time.
The Olympic Park Sprint Service has 2 x 4S sets operating for the major part of the day, from first service to last service, 0440 hours until 0010 hours next day (approx.).
This service is built-up to 8S set consist when required for a Special Event.
The Carlingford Line Service has 2 x 4S sets operating for the major part of the day, from first service at 0426 hours up until 1900 hours (approx.).
8 x 8S sets are Timetabled to operate to and from the City, around the City Circle, with the spread of hours at Central (inbound and outbound), as follows (approx.):-
Morning Peak: 0745 hours up until 0935 hours.
Evening Peak: 1630 hours up until 1810 hours.