Honeywell VRX180 Overview of the Setpoint Profiler, Definitions, Profile features, Section

Setpoint Profiler

5. Setpoint Profiler

What’s in this section?

Section 5 explains the functions, configuration, and operation of the Setpoint Profiler. Terminology is defined and all prompts are explained.

Section		Page
Overview of the Setpoint Profiler	175
Components of a profile	178
Parameters that control a profile’s execution	185
How to set up a profiler	189
How to load and run a profiler	197

5.1 Overview of the Setpoint Profiler

Definitions

A profiler is a Setpoint Profiler function block. This function block is what you interact with when you program and run a profile. The profiler is analogous to a compact disk player on a stereo, in that the profiler “plays” a profile. Your instrument contains 1, 2, 3, or 4 profilers, depending on the option ordered.

A profile is a series of ramp and soak segments, along with any parameters associated with those segments, such as segment loops, events, and guaranteed soak enables. The setpoint produced by the profile is used by a control loop’s Setpoint #2. A profile is also known as a curve or recipe. A profile is analogous to a compact disc, in that the profile is “played” by the profiler. Your instrument contains 1, 2, 3, or 4 profiles, depending on the option ordered.

A program is a set of one to four profiles, depending on the instrument. Programs in a single profile instrument contain 1 profile, programs in a two-profile instrument contain 2 profiles, programs in a three- profile instrument contain 3 profiles, and programs in a four-profile instrument contain 4 profiles.

Guaranteed soak is a set of parameters that hold the profiler when the deviation between the generated setpoint and either PV is larger than a configured limit.

Event outputs are discrete output parameters of the Setpoint Profiler function block. They may be tied to other function blocks such as Discrete Outputs.

Profile features

Each profile has the following features:

•A second PV is available. Each PV is monitored for excessive deviation from the profile value, in which case the profiler can be automatically put on Hold.

•Menu or discrete control of profile resetting, starting, holding, advancing, shutting down, or fast forwarding through the profile.

•Discrete input for starting the profiler at the current value of the process variable. Known as “hot start.”

•Discrete input for enabling/disabling guaranteed soak over the entire profile.

Video Recorder – User Manual 175