
Alarm, fault, and system messages
9.2 Diagnostics through LEDs
ET 200pro FC
Operating Instructions, 11/2007, A5E01100763B AA
141
Description of the LEDs
LEDs Description
System failure (SF) The "System failure" LED indicates a general system error in either
the software or hardware.
Ready (RY) The Ready LED indicates whether the converter is ready; a control
word is sent for this purpose. It does not show whether the drive is
running or not.
Final state (FS) The "Final state" LED shows whether the final state of a safety
function that has been triggered has been reached.
Safe torque off (STO) The STO LED indicates the safety function "Safe Torque Off".
Safe Stop 1 (SS1) The SS1 LED indicates the safety function "Safe Stop 1".
Safely Limited Speed (SLS) The SLS LED indicates the safety function "Safely Limited Speed".
You can find safety function information in the Function Manual.
Standard functions
LEDs
SF RY/RDY
Red Green
Description
Ready or running; bus/master connection OK
Installation
General fault
Download from the MMC
No power supply available
In any state where it makes no difference whether the LED is off, on or flashing, it is listed as
"Not relevant".
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