User`s manual

5-2 Series 90™-30 CPU with Embedded PROFIBUS Interface – November 2004 GFK-2334A
5
PROFIBUS CPU366 LEDs
LED Patterns Before and During PROFIBUS CPU366 Configuration
LED Pattern Meaning
SYS off and COM blinking green
PROFIBUS Master and connected slaves are not configured
The following blinking sequence repeats
continually:
SYS off, COM blinking green
SYS off, COM blinking red
SYS red, COM off
PROFIBUS Master configured in PLC but no slaves added
SYS red, COM green
PROFIBUS Master configured and slaves added.
Note: This condition will continue until all the slaves are added
and the configuration of each and every slave matches
the master configuration.
LED Patterns After PROFIBUS CPU366 is Configured
LED Pattern Meaning
Both LEDs solid green
Normal operation; no errors.
COM and SYS LEDs flash alternately
CPU366 is in System Configuration mode (loading firmware)
SYS LED
Red One or more slaves is indicating a fault condition.
Flashing Red/Green alternately
The CPU366 or CPU is in Stop.
Green
The CPU366 is scanning in Run mode.
Flashing Green System startup.
Note: This LED flashes green for two seconds at system
startup
COM LED
Red, flashing at 1-second intervals A network error has occurred.
Green No network errors exist.