NORD Drivesystems BU0220 - Manual (Page 31)

3 Displays and diagnosis
BU 0220 GB-0912 Subject to technical amendments 31
3.1.2 Signal status LEDs
This manual only describes the LED signal statuses of the PROFIBUS DP modules. Information for the
frequency inverter LEDs (SK 2xxE) can be found in the relevant manual (BU0200).
3.1.2.1 Module-specific displays
The status of the technology unit or the system bus is indicated by the LEDs DS and DE.
LED (green)
DS
 Device State
LED (red)
DE
 Device Error
Meaning
... Slow flashing = 2Hz (0.5s cycle)
… Rapid flashing= 4Hz (0.25s cycle)
OFF OFF Technology unit not ready, no control voltage
ON OFF Technology unit ready, no error, at least one frequency inverter is
communicating via the system bus
ON Flashing 0.25s Technology unit ready, however
 one or more of the connected frequency inverters has a fault status
(see frequency inverter manual)
Flashing 0.5s OFF Technology unit ready and at least one further subscriber is connected
to the system bus, but
 No frequency inverter on the system bus (or connection interrupted)
 Address error for one or more system bus participants
Flashing 0.5s Flashing 0.25s
Flash interval
1 x - 1s pause
System bus is in status "Bus Warning"
 Communication on system bus interrupted or
 No other participant present on the system bus
Flashing 0.5s Flashing 0.25s
Flash interval
2 x - 1s pause
 System bus is in status "Bus off" or
 The system bus 24V power supply was interrupted during operation
Flashing 0.5s Flashing 0.25s
Flash interval
3 x - 1s pause
 No system bus 24V power supply
(system bus is in status "Bus off")
Flashing 0.5s Flashing 0.25s
Flash interval
4 x - 1s pause
 PROFIBUS DP error of the technology unit
Details: LED flashing code:BR and BE
(Section 3.1.2.2 "PROFIBUS DP displays")
OFF Flashing 0.25s
Flash interval
1
…7 x - 1s pause
System error, internal program sequence interrupted
 EMC interference (observe wiring guidelines!)
 Module faulty