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.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 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.