Overall Transmission Error

What does 1508.15 mean?

This status bit, when active (1), indicates that a general communication transmission error has occurred through the Serial Communication Unit (SCU) port 1. It serves as an umbrella flag for more specific communication issues such as FCS, timeout, overrun, framing, or parity errors, preventing successful data exchange with the destination device.

• FCS check error (indicated by 1508.7 being set to 1).
• Communication timeout error (indicated by 1508.5 being set to 1).
• Data overrun error (indicated by 1508.4 being set to 1).
• Framing error (indicated by 1508.3 being set to 1).
• Parity error (indicated by 1508.2 being set to 1).

Click steps to track your progress.

1. 1

   Check the status of other individual bits within WORD 1508 (e.g., 1508.7 for FCS, 1508.5 for Timeout) to pinpoint the specific communication problem.

2. 2

   Verify the physical serial communication cable connections at both the SCU and the Destination Device terminals.

3. 3

   Ensure all serial communication settings (baud rate, parity, data bits, stop bits) on the SCU and the Destination Device are configured identically.

4. 4

   Inspect the serial cable for damage, proper shielding, and correct routing away from sources of electrical noise.