Siemens SIMATIC FM 351 - Meaning of the Error LEDs

Diagnostics
11-3
FM 351 Positioning Module
C79000-G7076-C351-02
11.3 Meaning of the Error LEDs
The status and error LEDs indicate various error states.
SF
CH 1
CH 2
Figure 11-1 Status and Error Indicators of the FM 351
LED
Meaning Explanation
SF (red)
LED – ON
Group error This LED indicates an error on the FM 351.
Diagnostic interrupt (internal or external (channel) error)
To eliminate the error, refer to the error list in the Appendix C.5 (page
C-15).
CH 1 (red)
CH 2 (red)
Channel error 1
Channel error 2
These LEDs indicate channel errors on channel 1 or channel 2.
• Encoder wire break
• Absolute encoder errors
• Incremental encoder missing pulses
• Operating errors
• Parameter assignment error with parameters from the SDB.