About Boolean minimum on and off times

The respective point properties are Min Active Time and Min Inactive Time. Usage is optional, and both properties work independently. Typical usage is to prevent short-cycling of equipment controlled by the point. Default property times for a Boolean writable are all zeros (00000h 00m 00s), which effectively disables a timer. In either property, you can specify any value needed using of a mix of hours (h), minutes (m), and seconds (s) to enable that timer.

A state change transition to active or inactive triggers a minimum timer. This stores the new state value in the point’s priority array (at priority level 6) for the duration of that timer. While a minimum timer is in effect, only input changes at a higher priority (5 or above) or an emergency action can affect the Out value.

For example, a Boolean writable point controls a fan, with related properties set as follows:

• Starting with the fan stopped at schedule level, priority In16, if a user manually overrides using priority level In8, the fan runs for 90 seconds at priority level 6 (a higher level). After this period, the fan continues running at the override In8 level for the duration of the override.

• During the initial 90 seconds, a different override action (off or auto) is ineffective because the higher priority level 6 remains in control.

• Once stopped, the point’s minimum off time keeps the fan off at priority level 6 for the specified duration (for example, 3 minutes and 5 seconds). During this period, only an emergency command or input change at In2–In5 can effect further change.