User`s guide

Setpoint Scheduler
What is a Setpoint Schedule
166 UMC800 Control Builder User’s Guide Release E
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What is a Setpoint Schedule
Introduction
A suite of Setpoint Scheduler blocks may be configured for multi-setpoint control. The suite is comprised
of a Master block, Auxiliary Setpoint block, Auxiliary Event block, State Switch Block, and State Flags
block. (See Figure 46.)
The Master block supports up to 8 ramp or soak outputs operating on a common time base. It accepts one
PV for each setpoint. Setpoint guarantee
is provided for the master (SPS) block setpoints with a single
symmetrical value for each setpoint output. You can assign a failsafe value for each setpoint.
The Auxiliary block supports up to 8 soak only outputs.
The Event block supports up to 16 event outputs.
A single schedule may be up to 50 segments in length and includes auxiliary block data. Up to 10
schedules may be stored in the controller’s memory.
Setpoint Schedules offer the same operating modes and digital controls as setpoint programs.
On-line editing of a running schedule is supported through dedicated operator interface displays
Setpoint guarantee
Setpoint guarantee is provided for the master block setpoints with a single symmetrical value for each
setpoint output. Actions for the guarantee soak may be set on a per segment basis for OFF, high setpoint
deviation, low setpoint deviation or both high and low setpoint deviations.
Segments
Each segment of the Setpoint Scheduler allows entry of a next segment recycle location and a number of
recycles up to 998, or infinite. This function allows unlimited recycle nesting and continuous recycle
operation. A jog function allows a single jump to a designated segment number through a digital input to
the State Switch block.
Labels
Eight character labels and four character engineering units are provided for each process variable of the
master and auxiliary setpoint blocks. Labels and on/off descriptions are also provided for the Digital Event
block. [See Setpoint Scheduler Display Configuration (page 119).] Assigning these labels first will aid
you in the setpoint schedule configuration process. These labels will appear in the configuration
dialog boxes.