Primary States (Autocalibration Sequence) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02
Language
English

The module’s AUTOCAL-STATE takes on the following values.

  • Uncalibrated: This is the initial state for the module. If periodic autocalibration is enabled (Days Between Autocals > 0), then the module remains in this state until the initial autocalibration sequence begins. If not enabled, then the module immediately transitions to the Normal state and await a manual request for autocalibration.

  • Waiting to Calibrate: This is the first state in the calibration sequence. The dampers are commanded closed while the module is in this state. The module remains in this state long enough for all of the dampers to close (based on the values of the Stroke Time inputs).

  • Waiting for Damper: This state is a holding pattern for the module if the Damper Percent Cmd indicates that the damper is not responding to the module’s command (for example, Emergency Mode has control via a value other than Normal). The module remains in this state until the damper again is responding. This is done to prevent a new zero offset from being calculated when the damper may not be closed.

  • Autocalibrate: This state indicates that the flow calculation primitives should re-calculate the zero offset point. The module remains in this state for 10 seconds, during which time the flow calculation primitives average the velocity pressure input to determine a smoothed offset.

  • Normal: This state is the typical value for the module. It indicates that no calibration is currently active. If periodic autocalibration is enabled (Days Between Autocals > 0), then the module remains in this state for the time specified by the Days Between Autocals input.