Messages and fault codes
7.1 Status display using LEDs
CU240S and CU240E Control Units, FW 3.2
222 Operating Instructions, 03/2009, A5E02440075B AA
Table 7- 3 Status displays on the CU240S PN
LED displays
SF
(red)
RDY
(green)
BF
(red)
LNK
(green)
ACT
(yellow)
Possible operating and fault states
On / Off Flashing --- On / Off On / Off
• Commissioning
• Restoring the factory setting
• Parameter download
On Off --- On / Off On / Off General fault
On / Off On / Off Flashing On OFF Bus failure (no data)
On / Off On / Off On OFF OFF Bus failure (searching for baud rate)
On / Off On / Off OFF On On / Off Connection established
On / Off On / Off On OFF OFF No connection established
On / Off On / Off OFF On On Data transfer active
Off On --- On / Off On / Off Ready
LED status display for fail-safe inverters - CU240S DP-F
Table 7- 4 Display of the general states on the CU240S DP-F
LED displays
SF
(red)
RDY
(green)
BF
(red)
ES
(yellow)
STO
(yellow)
SS1
(yellow)
SLS
(yellow)
Possible operating and fault states
On / Off Flashing --- On / Off --- --- ---
• Commissioning
• Restoring the factory setting
• Manual parameter download
On / Off Flashing --- Flashing Flashing Flashing Flashing
• Safety commissioning
• Resetting the safety parameters
Flashing Flashing --- Flashing Flashing Flashing Flashing Parameter download from the memory
card when switching-on
On OFF --- On / Off --- --- --- General fault
OFF On --- On / Off --- --- --- Ready
Table 7- 5 Display of the communication states on the CU240S DP-F
LED displays
SF
(red)
RDY
(green)
BF
(red)
Possible operating and fault states
On / Off On / Off Flashing Bus failure (no data)
On / Off On / Off On Bus failure (searching for baud rate)
The "ES", "STO" and "SS1" LEDs have no significance for the communication status of the
CU240S DP-F
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