Temperature Difference Error
Beckhoff · EL2904 TwinSAFE Fail-Safe Output Terminal
What does Diag 2 Flash 9 mean?
A significant temperature difference has been detected between internal components of the terminal, such as between different processor boards or specific microcontrollers. This indicates an imbalance in heat distribution or a localized thermal issue that could affect the stability and longevity of the terminal's electronics. Unresolved, it can lead to unreliable operation or component failure.
Complete Troubleshooting Guide
- 1
Ensure the ambient temperature is within the specified operating range and is stable without significant fluctuations.
- 2
Check for localized heat sources or cooling drafts within the control cabinet that could create temperature gradients across the terminal.
- 3
Verify proper air circulation and heat dissipation mechanisms are functioning correctly within the enclosure.
- 4
Take suitable EMC measures if electromagnetic interference is suspected to be affecting internal temperature sensors or component operation. If the issue persists, replace the terminal.