BECKHOFF KL6904 - Manual (Page 46)

Operation
44 KL6904
4.3.1.2 Diag 2 (red)
The Diag 2 LED indicates the state of the digital outputs.
Flashing Code Meaning
rapid flickering, alternating with 1 flash pulse Output 1: Open load or
current below minimum value of 20 mA or
current above maximum value of 500 mA
rapid flickering, alternating with 2 flash pulses Output 2: Open load or
current below minimum value of 20 mA or
current above maximum value of 500 mA
rapid flickering, alternating with 3 flash pulses Output 3: Open load or
current below minimum value of 20 mA or
current above maximum value of 500 mA
rapid flickering, alternating with 4 flash pulses Output 4: Open load or
current below minimum value of 20 mA or
current above maximum value of 500 mA
rapid flickering, alternating with 5 flash pulses Field potential too low
rapid flickering, alternating with 6 flash pulses Field potential too high
rapid flickering, alternating with 7 flash pulses Terminal temperature too low
rapid flickering, alternating with 8 flash pulses Terminal temperature too high
rapid flickering, alternating with 9 flash pulses Temperature difference error
rapid flickering, alternating with 10 flash pulses error in output circuit through Open Load,
external supply or cross-circuit
These errors can only be reset by switching the power supply for the TwinSAFE terminal off and back on
again.