Siemens SINAMICS S120 Commissioning Manual page 250

Diagnostics
3.1 Diagnostics via LEDs
LED Color
COM
-
Green
Red
MOD -
OUT > 5 V -
Orange
Make sure that the encoder connected is designed for a 24 V supply. Connecting a 5 V encoder to a 24 V supply can
1)
result in destruction of the encoder electronics.
248
State Description / cause
Off Cyclic communication has not (yet) taken place.
Note:
PROFIdrive is ready for communication when
the Control Unit is ready (see LED: RDY).
Continuous light Cyclic communication is taking place.
Flashing light Full cyclic communication is not yet taking place.
0.5 Hz
Possible causes:
The controller is not transferring any
•
setpoints.
• During isochronous operation, no GC (Global
Control) or a faulty GC is transferred by the
controller.
Flashing light The PROFIBUS master is sending a faulty
0.5 Hz parameter assignment or the configuration file is
corrupted.
Flashing light Cyclic bus communication has been interrupted
2 Hz or could not be established.
Off -
Off -
Continuous light The voltage of the electronics power supply for
the measuring system is 24 V.
1)
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
Remedy
-
-
-
Modify the
configuration between
master/controller and
control unit.
Rectify the fault in bus
communication.
-
-
Commissioning Manual