6

Environment Error: Internal temperature below minimum

Beckhoff · EL2912 TwinSAFE

What does 6 mean?

When LED Diag 1 is off and LED Diag 2 flashes with code 6 (400ms ON / 400ms OFF), it indicates that the TwinSAFE component's internal temperature has fallen below its minimum safe operating limit. This environment error suggests operation in an excessively cold environment, which might affect component performance, material properties, or lead to condensation issues if cold-soaked.

Source: Beckhoff EL2912 TwinSAFE
Open Manual (Page 49)