Framing Error

What does 1508.3 mean?

This status bit, when active (1), indicates that the received data frame did not terminate with a valid stop bit, leading to a loss of synchronization. This is a common issue when the data bits or stop bits settings are mismatched between the communicating devices, or if there is significant line noise causing signal distortion.

• Mismatched settings for data bits (e.g., 7 or 8) or stop bits (e.g., 1 or 2) between the SCU and the Destination Device.
• Noise or interference on the communication line corrupting the start/stop bit sequence.
• Damaged serial communication port on either the SCU or the Destination Device.
• Physical wiring issues causing intermittent signal loss or distortion.

Click steps to track your progress.

1. 1

   Verify that the data bits (e.g., 7 or 8) and stop bits (e.g., 1 or 2) settings are identical on both the SCU and the Destination Device.

2. 2

   Inspect the serial communication cable for proper shielding and secure termination, ensuring it is isolated from electrical noise sources.

3. 3

   Check the physical connection points of the serial cable at both the SCU and Destination Device terminals for looseness or damage.

4. 4

   Swap the serial cable with a known-good cable to rule out cable defects or poor quality.