Siemens SIMATIC ET 200iSP Operating Instructions Manual page 146

Commissioning and Diagnostics
6.6 Status and error LEDs on the ET 200iSP
Analog electronic modules
SF
Status and error LEDs on the analog electronic modules
Table 6-5 Status and error LEDs on the analog electronic modules
LEDs Meaning
SF
on Wrong module inserted or diagnostic mes‐
sage is present.
Watchdog module
SF
①
146
Group error (red)
1
Group error (red)
Bit 0: Status (green)
Remedy
Analyze the diagnostic data.
Operating Instructions, 11/2017, A5E00247483-07
ET 200iSP