Led Displays - Siemens NCU 7 0.2 Series Manual

3.4.2

LED displays

Table 3- 1 Meaning of LED states
Name Function
RDY Ready
RUN PLC RUN
STOP PLC STOP
SU/PF PLC FORCE
SF PLC SF
DP1 BUS1 F
DP2 BUS2 F
OPT *) BUS3 F
*) The "OPT" LED is only significant for "PN NCUs".
NOTICE
If all the LEDs are flashing, the PLC must be reset via the mode selector (move switch to
position "3" to reboot).
Note
While the Control Unit is powering up, all LEDs briefly light up orange. You can carry out a
detailed diagnosis using a PG/PC and the operating software.
NCU 7x0.2
Manual, 02/2011, 6FC5397-0AP20-0BA0
Status
Red
Flashing red/orange
(0.5 Hz)
Orange
Flashing orange (0.5 Hz)
Flashing orange (2 Hz)
Green
Flashing green/orange or
red/orange (1 Hz)
Green
Orange
Red
Red
Red
Red
Off
Red
Flashing red
(2 Hz)
3.4 Operating and display elements
Meaning
There is at least one fault (e.g. RESET, watchdog
monitoring etc. ) or the Control Unit is booting up.
Error accessing CompactFlash Card
Accessing CompactFlash Card
Updating the firmware of the connected DRIVE-CLiQ
components
Firmware update is complete for components. Wait for
POWER ON for the components in question.
NC powered up and everything in cyclic mode
LED-supported recognition of connected DRIVE-CLiQ
component is activated: (p0124[0] = 1).
PLC ready to operate
PLC stopped
FORCE activated
PLC group error
PROFIBUS-DP1 group error
PROFIBUS-DP2 group error
The PROFINET system runs correctly; data exchange to all
configured IO devices runs.
Bus fault (no physical connection)

Incorrect transmission rate

Failure of a connected I/O device.

Incorrect or no configuration.

Description
25