hisCollectInterval

Enables interval history collection of the curVal. The value must be a duration Number with a "sec", "min," or "hr" unit:

• if secondly, then must be divisible evenly into a 60sec minute
• if minutely, then must be evenly divisible into a 60min hour
• if hourly, then must be evenly divisible into a 24hr day

Also see point.