Led Display And Troubleshooting; Diagnostic Displays For The Power Rail Booster - Siemens 6ES7 972-4AA02-0XA0 User Manual

User´s Guide Power Rail Booster

7 LED Display and Troubleshooting

7.1 Diagnostic Displays for the Power Rail Booster

The front of the Power Rail Booster features 6 LEDs for quick diagnosis of faults and
operating states. The Table below describes the faults and operating states indicated
by the LEDs and their causes.
LED Meaning Display
SF PRB Off
Group error
Red
Yellow
flashing
(2Hz)
ON PRB ready Off
Green
DP Bus activity Off
PROFIBUS
On
Flickers
PR Bus activity Off
Power Rail
On
Flickers
ϑ Temperature Off
Red
Yellow
flashing
(2Hz)
C Reserve Off
Fig. 28: Possible LED displays and their causes
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State
No fault
Group error - Short circuit on Power Rail.
- Line interruption on PROFIBUS (feed
booster only)
- Line interruption on Power Rail (moving
booster only)
- Baud rate not found or invalid baud rate
- Baud rate lost following invalid message
frames (frame collision on the bus)
- Shutdown due to excessively high
temperature
Warning - Warning threshold exceeded for output
temperature
No supply 24V DC supply voltage not connected
voltage
Internal logic PRB defective
not ready
Supply voltage
OK
- No message frames received on
PROFIBUS side
- No message frames received on
PROFIBUS side
- No message frames received on Power
Rail side
- No message frames received on Power
Rail side
Temperature Safe, reliable communication ensured for
within this parameter
permissible
range
Shutdown
- Output temperature too high. Reliable,
due to
safe communication no longer ensured.
overtemperature
Power section shut down following
termination of last message frame
Warning due to - Output temperature just before critical
overtemperature
range. Safe communication is still
possible.
Not currently used
6ES7 972-4AA02-0XA0
Version 12/2005
Cause/Remarks
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