Operating instructions

Messages and fault codes
7.1 Status display using LEDs
CU240S and CU240E Control Units, FW 3.2
224 Operating Instructions, 03/2009, A5E02440075B AA
Table 7- 8 Display of the communication states on the CU240S PN-F
LED displays
SF
(red)
RDY
(green)
BF
(red)
LNK
(green)
ACT
(yellow)
Possible operating and fault states
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 On / Off PROFIsafe failure
On / Off On / Off OFF On On / Off Connection established
On / Off On / Off ON OFF OFF No connection
On / Off On / Off OFF On On Data transfer active
The "ES", "STO" and "SS1" LEDs have no significance for the communication status of the
CU240S PN-F
Table 7- 9 Display of the fail-safe states on the CU240S PN-F
LED displays
SF
(red)
RDY
(green)
ES
(yellow)
STO
(yellow)
SS1
(yellow)
SLS
(yellow)
Possible operating and fault states
On / Off On OFF On On / Off On / Off STO parameterized
On / Off On On Flashing --- ---
• STO initiated
• STO reached
On / Off On OFF On / Off On / Off On SLS parameterized
On / Off On OFF --- --- Flashing SLS initiated
On / Off On On --- --- Flashing SLS reached
On / Off On OFF On / Off On On / Off SS1 parameterized
On / Off On OFF --- Flashing --- SS1 initiated
On / Off On On --- Flashing --- SS1 reached
On OFF On OFF OFF OFF Passivation
The "BF", "LNK" and "ACT" LEDs have no significance for the fail-safe states of the CU240S
PN-F