Figure 5-6 External Ramp Type - Honeywell VPR100 User Manual

Setpoint Profiler
External Ramp Type
This ramp type works with the RAMP INCREMENT discrete input. During a ramp segment, each time
RAMP INCREMENT changes from OFF to ON, the profiler output incrementally changes by the
amount specified in the ramp segment's TIME (in units of the PV). When RAMP INCREMENT
changes from ON to OFF, the profiler output soaks at its present value. This increment-soak repeats
until the profiler output reaches the VALUE of the next soak segment. The ramp segment's VALUE
prompt is not used.
Segment #3
Value
Segment #1
Value
ATTENTION
•
External ramp type's TIME prompt is in engineering units of the PV, not in time units (seconds, minutes, or
hours).
•
To increment toward a lower soak value, enter a positive TIME amount. The Setpoint Profiler "knows" to
increment or decrement this amount toward the next soak value.
190
Ramp segment s
Time = amount profile will change toward next soak Value
when the Ramp Increment discrete switches on.
Value = not used wit h ramp segment
Segment #1
Time
Segment #2
Elapsed time

Figure 5-6 External Ramp Type

VPR & VRX – User Manual
Soak segments
Time = duration of soak
Value = value of soak
Segment #2 Time
Segment #2 Time
Segment #2 Time
Segment #3
Time
Ramp Increment Off-to-On
causes incremental value
change toward next soak
Value
12/00