text: <user>
  Create a function block for implementing an Agile product development workflow in TwinCAT Structured Text<|endoftext|>
  <assistant>
  FUNCTION_BLOCK FB_AgileProductDevelopment
  VAR_INPUT
      bStartSprint : BOOL;
      bEndSprint : BOOL;
      nSprintDuration : TIME := T#2W; // Default sprint duration of 2 weeks
  END_VAR
  
  VAR_OUTPUT
      bSprintActive : BOOL;
      nSprintProgress : REAL;
      sCurrentPhase : STRING;
  END_VAR
  
  VAR
      fbSprintTimer : TON;
      nTotalTasks : UINT := 0;
      nCompletedTasks : UINT := 0;
      arrPhases : ARRAY[0..3] OF STRING := ['Planning', 'Development', 'Testing', 'Review'];
      nCurrentPhaseIndex : UINT := 0;
  END_VAR
  
  // Main program
  fbSprintTimer(IN := bSprintActive, PT := nSprintDuration);
  
  // Start new sprint
  IF bStartSprint AND NOT bSprintActive THEN
      bSprintActive := TRUE;
      nSprintProgress := 0;
      nCurrentPhaseIndex := 0;
      nTotalTasks := 0;
      nCompletedTasks := 0;
  END_IF
  
  // Update sprint progress
  IF bSprintActive THEN
      nSprintProgress := REAL_TO_REAL(TIME_TO_REAL(fbSprintTimer.ET) / TIME_TO_REAL(nSprintDuration)) * 100;
      sCurrentPhase := arrPhases[nCurrentPhaseIndex];
      
      // Simulate phase transitions
      IF nSprintProgress >= 25 AND nCurrentPhaseIndex < 1 THEN
          nCurrentPhaseIndex := 1;
      ELSIF nSprintProgress >= 50 AND nCurrentPhaseIndex < 2 THEN
          nCurrentPhaseIndex := 2;
      ELSIF nSprintProgress >= 75 AND nCurrentPhaseIndex < 3 THEN
          nCurrentPhaseIndex := 3;
      END_IF
  END_IF
  
  // End sprint
  IF (bEndSprint AND bSprintActive) OR fbSprintTimer.Q THEN
      bSprintActive := FALSE;
      // Perform sprint retrospective and planning for next sprint here
  END_IF
  
  // Method to add a new task
  METHOD AddTask : BOOL
  VAR_INPUT
      sTaskDescription : STRING;
  END_VAR
      nTotalTasks := nTotalTasks + 1;
      // Logic to add task to a task list would go here
      AddTask := TRUE;
  END_METHOD
  
  // Method to complete a task
  METHOD CompleteTask : BOOL
  VAR_INPUT
      nTaskId : UINT;
  END_VAR
      IF nCompletedTasks < nTotalTasks THEN
          nCompletedTasks := nCompletedTasks + 1;
          // Logic to mark task as complete would go here
          CompleteTask := TRUE;
      ELSE
          CompleteTask := FALSE;
      END_IF
  END_METHOD
  
  (*
  This function block implements a basic Agile product development workflow in TwinCAT Structured Text.
  It simulates sprints with configurable duration, tracks progress, and manages different phases of the development process.
  The block allows starting and ending sprints, adding tasks, and marking tasks as complete.
  
  Potential enhancements:
  1. Integration with TwinCAT HMI for visual representation of the Agile board
  2. Utilization of TwinCAT's persistent variables to maintain sprint and task data across PLC restarts
  3. Implementation of TwinCAT's alarm management for sprint deadlines and important events
  *)<|endoftext|>
  