SFC Array Fault (Suppressible)

What does 4/20 mean?

This is a specific type of array fault encountered during the Sequential Function Chart (SFC) postscan process. When this fault is suppressed, the controller employs an internal fault handler to clear it, causing the postscan process to bypass the instruction that caused the fault and proceed to the next instruction. This behavior is active only when SFC instructions are configured for automatic reset.

• A fault condition is detected within an array during the SFC postscan.
• Incorrect array operations or data access within SFC logic lead to an array fault.
• SFC instructions are configured for automatic reset, which enables the suppression mechanism for this specific fault.

Click steps to track your progress.

1. 1

   Verify that SFC instructions are configured for automatic reset if the suppression of this fault is the desired behavior.

2. 2

   Analyze the SFC logic and associated array operations to identify and correct the specific instruction or data manipulation causing the array fault.

3. 3

   Review the application logic to understand the implications of instructions being skipped when this fault is suppressed.