System manual CECX / PROFIBUS Master interface module CECX-F-PB-V1
CECX-II 25-4
25.4 Operating elements and displays
25.4.1 Ready LED (RDY)
State Function
Illuminated yellow Device is ready.
Blinking yellow with 5 Hz Firmware download being executed.
Blinking yellow with 1 Hz Device waiting on firmware download.
Blinking yellow
irregularly
Severe hardware or system error detected.
Dark Supply voltage missing or hardware defect.
25.4.2 Communication LED (RUN)
State Function
Illuminated green
Communication running, at least one connection to a con-
figured participant is present.
Blinking green with 5 Hz
(ERR LED off)
No error in the communication, communication stopped.
Blinking green with 5 Hz
(ERR LED illuminated)
Ready for communication but no connection to a participant
present.
Blinking green
irregularly
During start-up:
Missing or faulty configuration, start-up required.
During the operation:
Watchdog time error
Dark No communication
25.4.3 Bus error LED (ERR)
State Function
Illuminated red
(STA LED off)
Short-circuit detected
Illuminated red
(STA LED lights up):
Device has a communication problem to at least one
PROFIBUS DP slave participant
Dark No error
25.4.4 Status LED (STAT)
State Function
Illuminated yellow
Device holds the PROFIBUS token and can transmit tele-
grams
Blinking yellow
irregularly
Device is in PROFIBUS ring and shares the token with other
PROFIBUS master devices
Dark
Device is not configured or has not received the Token and
is thus not in the PROFIBUS network