Beckhoff First Scan Bit Access

bit in Allen-Bradley systems. Instead, you must either access task-specific system information or create a custom flag. Method 1: Using Built-in System Info (Recommended) TwinCAT provides task-specific diagnostics through the array. This contains a FirstCycle boolean that is automatically set to for exactly one scan when the PLC starts or restarts. Structured Text Example:

Supervisor/Task-based initialization