Operating instructions

Messages and fault codes
7.1 Status display using LEDs
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA
221
Diagnostics via LEDs
Note
"---" signals that the LED state (on, off or flashing) is not relevant for the corresponding state.
LED status display for standard inverters
Table 7- 1 Status displays on the CU240S
LED displays
SF
(red)
RDY
(green)
Possible operating and fault states
On / Off Flashing
• Commissioning
• Restoring the factory setting
• Parameter download
On Off General fault
Off On Ready
Table 7- 2 Status displays on the CU240S DP
LED displays
SF
(red)
RDY
(green)
BF
(red)
Possible operating and fault states
On / Off Flashing ---
• Commissioning
• Restoring the factory setting
• Parameter download
On Off --- General fault
On / Off On / Off Flashing Bus failure (no data)
On / Off On / Off On Bus failure (searching for baud rate)
Off On --- Ready
Note
Control Unit with PROFIBUS DP interface – operation via terminals
If a Control Unit with a PROFIBUS DP interface is operated via terminals, in the standard
setting the BF-LED indicates a fault (flashes). You can avoid this fault display by setting the
fieldbus shutdown time in parameter P2040 to "0".