1. Issue

Users need to know the size limitation for Ladder Diagram sections to avoid performance issues and ensure proper project design.

2. Product Line

• Software: EcoStruxure™ Control Expert
• Language: Ladder Diagram (LD)
• Standard: IEC 61131-6

3. Environment

• Windows OS (e.g., Windows 10/11)
• Control Expert project with LD sections assigned to tasks (MAST, FAST, AUX).

4. Resolution

• Limit: Each Ladder Diagram section can contain up to 1000 lines.
• Best Practices:
  • Use smaller sections for easier maintenance and better performance during online modifications.
  • Apply conditional execution bits to optimize scan time.
  • Assign each section to only one task.