Certainly you can have you archiving of history done whenever you want.
If that is not on the hour that is easy.
So if you start your Detector collection with an MVS modify like the example below
F PTXMAN,START(DTR),DYN(Y),PRF(COLLDSN1),DB2(DSN1),INT(0030), EXT(Y),DST(DETECTOR),HLVL(PDT),RND(N)
Issue the command at 10 minutes past the hour, you can still have 30 minute intervals.
Make sure you turn rounding off e.g RND(N)
Then the archiving will run at 10 minutes past the hour and 40 minutes past the hour
not on the hour as rounding is turned off.