2
Fault list – safety technology
Fault 27 Encoder system
Manual – Fault Descriptions MOVISAFE
®
CS..A
37
Subfault: 25.100
Description: Device replacement detected
Fault class: Message
Cause
Measure
Current parameter set of safety card differs from
parameter set stored on pluggable memory
module.
No action required. The parameter set of the
pluggable memory module is applied to the safety
card.
Subfault: 25.101
Description: Activation of data of the replaceable safety key during safety card startup
Fault class: Message
Cause
Measure
The data on the replaceable safety key has been
overwritten by an older safety card version.
For information only.
2.7
Fault 27 Encoder system
Subfault: 27.1
Description: Relative position value invalid
Response: FS – encoder fault
Cause
Measure
Error during diagnostics of encoder involved in
calculating the position process value.
Check the exact fault in the fault memory and fol-
low the instructions to remedy the fault.
Subfault: 27.2
Description: Relative speed value invalid
Response: FS – encoder fault
Cause
Measure
Error during diagnostics of encoder involved in
calculating the speed process value.
Check the exact fault in the fault memory and fol-
low the instructions to remedy the fault.
Subfault: 27.4
Description: Failed to start referencing
Response: FS – warning
Cause
Measure
Encoder system not ready.
– Repeat referencing.
– If the fault occurs repeatedly, contact
SEW‑EURODRIVE Service.
27799182/EN – 10/2022