The scheduler can provide both "On/Off" and Setpoint changes. For example, an "OFF" hours Temperature Setpoint may be "setback" during evening hours to save energy while the "ON" hours Temperature Setpoint may be set for occupant comfort. The On Value and Off value are specified for each Tag (or Circuit). These can be any two values (i.e. not just 0 and 1) to allow setpoint changes and other value changes (included text strings).
The On Values and Off Values are specified for each tag in the Circuit Group. A tag can be viewed as representing a single electrical circuit (for example on/off control of lights). Hence, groups of tags are called "Circuit Groups". A "Circuit Group" can be any group of tags (or even a single tag) that will always share the same schedule.
The Time specifies the Start Time and Stop Time for each day of the Week. Each day of a schedule consists of Normal Hours, two sets of Extra Hours and a Default time period. Separate Start and Stop Time can be defined for Normal Hours, Extra Hours I and Extra Hours II. The Default applies to any time outside of Normal or Extra Hours. The Normal Hours, and Extra Hours, combined with the "Default", allows 4 time periods per day (minimum) to be specified. Additional schedules can be defined if more "periods" per day are required.
A Cycle Time, in 1-minute intervals, can also be specified to allow On/OFF cycling of equipment during the schedule (for example, turn the Fans on for 10 minutes, then off for 20 minutes from 8:00 am to 5:00 pm). The ON CYCLE TIME and OFF CYCLE TIME can be defined for each Normal, Extra Hours and default period of the day. If both ON Cycle = 0 and OFF Cycle=0, then nothing happens, the tags remain unchanged during the time period. If ON Cycle=1 and OFF Cycle=0, then no cycling happens and the tags are set to the ON values for the duration of the Start to Stop time.
Holiday defines calendar-based events. It allows "Holiday Schedules" to be set to account for non-occupancy or special events. The Holiday schedule can be used for any calendar event (based on Month, Day of Month and Year) up to 1 year in the future. Multiple holiday schedules can be configured and assigned to different groups of tags.
There is no limit to the number of Schedules that can be configured. Each schedule has a START TIME, STOP TIME, optional CYCLE time, ON and OFF values for each day of week plus the "Holiday schedule".
An Equipment Group associates a Time Schedule with one or more Circuit Groups . Multiple "Circuit Groups" can be linked to a single "Time Schedule" in an "Equipment Group". For example, the lights for each floor a building might be grouped into a Circuit group each (1stFloorCircuit, 2ndFloorCircuit, 3rdFloorCircuit, … 40thFloorCircuit). Each 'Occupied" floor might be assigned to the "Occupied Equipment Group" with the "Occupied Schedule". If a tenant moves, that floor would be reassigned to the "Unoccupied" Equipment group, which uses the "Unoccupied Schedule".
A MANUAL ON and MANUAL OFF feature allow a schedule to be "overridden" and forced to the ON or OFF values for a Circuit Group. MANUAL ON/OFF is typically used to enable occupancy (i.e. turn on the lights) for non-scheduled events. AUTOMATIC follows the defined schedule when specified in a Circuit Group.
New schedules and changes to schedules will Download to the SCADA node without stopping the SCADA Node.
Power Users can download and Modify Schedules from VIEW (and ViewDAQ) from the Tools menu. Web browser VIEW clients must be log in as Power Users to Download or Modify a Schedule. Any ViewDAQ user can download a schedule.
To access Scheduler from
Right Click -> Tools -> Scheduler
To access Scheduler from
From the Menu Bar select Tools -> Scheduler
or a pushbutton can be built using <GOTO>tool=bwsch.uti