SIMOTION C 
Operating Instructions, 02/2012 
165 
Alarm, error, and system messages 
9
9.1  Diagnosis using the LEDs 
Diagnostic LEDs 
The LEDs are explained in the order in which they are positioned on the SIMOTION C.  
Table 9- 1  Diagnostics LEDs of the SIMOTION C 
Display  Meaning  Explanations 
SF (red)  System fault  This LED indicates a fault on the SIMOTION C. 
LED - ON    An event which can be acknowledged is present (alarm, message, note). 
(see documentation package 
SIMOTION System and Function 
Descriptions
) 
LED - flashing 
(0.5 Hz) 
  No license exists for technology/optional objects under license. 
Technology/option objects under license include, for example: 
  Cam (synchronous axes with connected cam) 
  Ethernet (Ethernet interface) 
  TControl (Temperature Control) 
LED - OFF    SIMOTION C is operating without error. 
5 VDC (green)  Power supply 
for the electronics 
This LED indicates that the power supply is ready. 
LED - ON    The power supply of the SIMOTION C is operating without error. 
LED - OFF    If this is not illuminated, the reason may be: 
  No connected or switched-on network 
  No specified load power supply connected 
  Module not connected correctly 
  Module defective 
RUN (green)  SIMOTION C in RUN 
mode 
This LED indicates that the user program is running. 
LED - ON    See RUN (green) 
LED - flashing 
(2 Hz)  
  The time between selection of "RUN" mode until this mode has been 
attained is indicated by the LED flashing. 
STOPU (yellow)  SIMOTION C in STOP 
user program mode 
This LED indicates that the technology packages are active. A user 
program is not being executed. 
LED - ON    See STOPU (yellow) 
LED - flashing 
(2 Hz) 
  The time from when the "STOPU" operating mode is selected until this 
operating mode has been attained is indicated by the LED flashing. 
LED - "flickering"    Formatting the micro memory card