Understanding and Implementing the Beckhoff First Scan Bit in TwinCAT
Version and platform considerations
If you reset the PLC program without a hard power cycle or runtime restart, the behavior depends on whether you have retained the variable. ⚠️ Important Considerations
If you cannot use PlcTaskSystemInfo , you can create a local BOOL variable that is initialized to TRUE .
: Highly accurate; resets every time the PLC transitions from STOP to RUN or after a power cycle. Method 2: Manual Flag (The "Standard" Way)
Scan Bit | Beckhoff First
Understanding and Implementing the Beckhoff First Scan Bit in TwinCAT
Version and platform considerations
If you reset the PLC program without a hard power cycle or runtime restart, the behavior depends on whether you have retained the variable. ⚠️ Important Considerations
If you cannot use PlcTaskSystemInfo , you can create a local BOOL variable that is initialized to TRUE .
: Highly accurate; resets every time the PLC transitions from STOP to RUN or after a power cycle. Method 2: Manual Flag (The "Standard" Way)