Fault 20 Device monitoring

Subfault: 20.1 Description: Supply voltage fault
	Response: Output stage inhibit System state: Fault acknowledgment with CPU reset
	Cause	Measure
	24 V power supply unit overloaded.	Check the project planning for the power demand.
	Internal electronics supply voltage or externally connected DC 24 V supply voltage not within permitted voltage range.	– Check the voltage level of the external DC 24 V supply voltage and ensure that the connection is correct. – Acknowledge fault. – If the fault occurs repeatedly, contact SEW‑EURODRIVE Service.

Subfault: 20.2 Description: Supply voltage overloaded
	Response: Output stage inhibit
Cause	Measure
The current load on the current paths of the DC 24 V standby supply voltage inside the device is too high. The signal outputs of the device were therefore de-energized.	– Remove all external consumers: – At the digital outputs of the basic device – At any options that may be present – At all encoder connections – At other consumers at the DC 24 V output voltage terminals – Acknowledge fault. – Reconnect the consumers with the device, one after the other, until the fault message appears once again. – Connect a consumer with a lower current consumption or eliminate the short circuit.

Subfault: 20.2

Description: Supply voltage overloaded

Response: Output stage inhibit

Cause

Measure

The current load on the current paths of the DC 24 V standby supply voltage inside the device is too high. The signal outputs of the device were therefore de-energized.

– Remove all external consumers:

– At the digital outputs of the basic device

– At any options that may be present

– At all encoder connections

– At other consumers at the DC 24 V output voltage terminals

– Acknowledge fault.

– Reconnect the consumers with the device, one after the other, until the fault message appears once again.

– Connect a consumer with a lower current consumption or eliminate the short circuit.

Subfault: 20.7 Description: Internal hardware fault
	Response: Output stage inhibit System state: Fault acknowledgment with CPU reset
Cause	Measure
Fault in the device hardware.	– Acknowledge fault. – If the fault occurs repeatedly, replace the device.

Subfault: 20.7

Description: Internal hardware fault

Response: Output stage inhibit

System state: Fault acknowledgment with CPU reset

Cause

Measure

Fault in the device hardware.

– Acknowledge fault.

– If the fault occurs repeatedly, replace the device.

Subfault: 20.8 Description: Fan – warning
	Response: Warning with self-reset
Cause	Measure
Fan function impaired.	– Check fans for contamination. – If the warning occurs repeatedly, contact SEW‑EURODRIVE Service.

Subfault: 20.8

Description: Fan – warning

Response: Warning with self-reset

Cause

Measure

Fan function impaired.

– Check fans for contamination.

– If the warning occurs repeatedly, contact SEW‑EURODRIVE Service.

Subfault: 20.9 Description: Fan – fault
	Response: Application stop + output stage inhibit
Cause	Measure
Fan defective.	Contact SEW‑EURODRIVE Service.

Subfault: 20.9

Description: Fan – fault

Response: Application stop + output stage inhibit

Cause

Measure

Fan defective.

Contact SEW‑EURODRIVE Service.

Subfault: 20.10 Description: Fan – supply voltage fault
	Response: Emergency stop + output stage inhibit
Cause	Measure
Supply voltage of fan missing.	Contact SEW‑EURODRIVE Service.

Subfault: 20.10

Description: Fan – supply voltage fault

Response: Emergency stop + output stage inhibit

Cause

Measure

Supply voltage of fan missing.

Contact SEW‑EURODRIVE Service.

Subfault: 20.11 Description: STO – switching delay
	Response: Output stage inhibit
Cause	Measure
Switching delay between STO signals F-STO_P1 and F-STO_P2.	– Check the STO wiring. – Make sure that both STO signals are switched to low level. – Acknowledge fault.

Subfault: 20.11

Description: STO – switching delay

Response: Output stage inhibit

Cause

Measure

Switching delay between STO signals F-STO_P1 and F-STO_P2.

– Check the STO wiring.

– Make sure that both STO signals are switched to low level.

– Acknowledge fault.

Subfault: 20.23 Description: Temperature detection in power section faulty
	Response: Output stage inhibit
Cause	Measure
Fault in the device hardware. Power section does not provide temperature data.	– Acknowledge fault. – Contact SEW‑EURODRIVE Service.

Subfault: 20.23

Description: Temperature detection in power section faulty

Response: Output stage inhibit

Cause

Measure

Fault in the device hardware. Power section does not provide temperature data.

– Acknowledge fault.

– Contact SEW‑EURODRIVE Service.