Honeywell VRX180 user manual Ramp Type = Rate

Setpoint Profiler

Rate Ramp Type

Each ramp segment’s TIME specifies the rate at which the profiler output will reach the next soak segment, where the rate is specified by the prompts TIME/TIME UNITS. The ramp segment’s VALUE prompt is not used.

Segment #3 Value

Segment #1 Value

Ramp Type = Rate

Features of this ramp type

*First and last segments must be soaks

*No consecutive ramps or soaks

Ramp segments

Time = rate at which next soak Value will be reached, in PV units/Time Units. Example: Time = 3. Time Units = Seconds. PV units = degrees F. Therefore, profile will ramp to next soak Value at 3 degrees F per second

Value= not used with ramp segments

Soak segments

Time = duration of soak

Value = value of soak

Segment #1	Segment #2	Segment #3
Time	Time = Rate	Time

Figure 5-5 Rate Ramp Type

ATTENTION

Rate ramp type’s TIME prompt is in engineering units of the PV, not in time units (seconds, minutes, or hours).

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.

180 Video Recorder – User Manual