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Temperature Profile Component

Temperature Profile

Section titled “Temperature Profile”

Path: src/modbus/TemperatureProfile.h

Revision History: Initial documentation

The TemperatureProfile component manages interpolated temperature profiles for industrial process control. It defines time-temperature relationships using control points and provides real-time interpolation to create smooth temperature transitions. The component works with a ModbusTCP interface, allowing remote control and status monitoring.

REQUIREMENTS

Section titled “REQUIREMENTS”
  • ESP32 microcontroller
  • Platform.io development environment
  • ModbusTCP server for communication
  • Associated PID controllers for temperature control (optional)
  • Associated SignalPlot for visualization (optional)

PROVIDES

Section titled “PROVIDES”

  • Enumeration Types:

    • TemperatureProfileRegisterOffset: Defines register offsets for Modbus communication
    • TemperatureProfileCommand: Commands to control profile execution
    • TempProfileControlType: Interpolation methods (LINEAR, CUBIC)

  • Structures:

    • TempControlPoint: Structure for control point definition with time (x) and temperature (y) values

  • Classes:

    • TemperatureProfile: Main component class that inherits from PlotBase

FEATURES

Section titled “FEATURES”
  • Create temperature profiles with customizable control points
  • Linear interpolation between control points
  • Modbus interface for monitoring and control
  • Real-time temperature calculation based on elapsed time
  • Integration with SignalPlot for visualization
  • Automatic update of target temperature registers
  • Profile execution control (start, stop, pause, resume)
  • JSON configuration support

DEPENDENCIES

Section titled “DEPENDENCIES”

TemperatureProfile

PlotBase

Component

ModbusTCP

ValueWrapper

ArduinoJson

BEHAVIOUR

Section titled “BEHAVIOUR”

The Temperature Profile component follows a state machine pattern for operation:

Initialization

start()

pause()

resume()

Profile Complete

stop()

stop()

stop()

disable()

enable()

disable()

Idle

Running

Paused

Finished

Disabled

TODOS

Section titled “TODOS”

PERFORMANCE

Section titled “PERFORMANCE”
  • Optimize interpolation calculations for better performance on embedded systems
  • Consider implementing a lookup table approach for frequently used temperature ranges
  • Reduce memory footprint by optimizing control point data structure

SECURITY

Section titled “SECURITY”
  • Implement authentication for Modbus write operations to prevent unauthorized control
  • Add validation for control points to prevent unsafe temperature settings
  • Consider implementing limits or sanity checks on temperature values

COMPLIANCE

Section titled “COMPLIANCE”
  • Verify conformance with industrial temperature control standards
  • Ensure proper error handling and recovery mechanisms
  • Document safety considerations for temperature control applications

RECOMMENDATIONS

Section titled “RECOMMENDATIONS”
  • Use a minimum of 3-5 control points for smooth temperature curves
  • Configure target registers to point to PID setpoint registers for closed-loop control
  • For critical applications, implement additional monitoring and safety systems
  • Associate a SignalPlot component for visual monitoring of temperature profiles
  • When creating profiles, ensure the first point starts at x=0 and the last ends at x=1000 (full scale)