
C1120 S5 to II/O Lightbus Interface Beckhoff II/O-Lightbus System
Date 27.06.97 Version 2.1 Page 33 of 52
Status LEDs
3 Status LEDs are shown on the front panel of the C1120 interface:
1. RUN : If this LED shows the C1120 interface is ready to work.
2. CPU-ERR : Intermitting light indicates mismatch of number of modules in
the configuration and II/O-Lightbus ring. Possibly the
EEPROM memory is defect.
Uninterrupted light indicates a general interface error. A cold
start is recommended prior to change of the interface.
3. II/O-ERR : Intermitting light indicates a general II/O-Lightbus error, which
can be analyzed in details or serviced by the special functions.
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