Service cases - hardware
4.1 PPU 24x.2/26x.2/28x.2
Hardware and Software
76 Service Manual, 03/2011, 6FC5397-5DP40-0BA0
There are 2 additional LEDs "FAULT" and "SYNC" next to port 1, which apply to both ports:
Name Color State Meaning
OFF For the maximum expansion level of the PLC I/O: The data
exchange to all configured IO devices runs without errors.
Is lit Bus fault:
No physical connection to a subnet/switch
Incorrect transmission rate
Full duplex transmission is not activated.
FAULT Red
Flashing
(2 Hz)
If the PN fault LED flashes red, there is no fault. The maximum
expansion level of the PLC I/O is not being used.
OFF Task system of the SINUMERIK 828D is not synchronized to the
send clock of the PLC I/O interface based on PROFINET IO. An
internal substitute clock of the same size as the send clock will
be generated.
Is lit Task system of the SINUMERIK 828D has synchronized to the
clock of the PLC I/O interface based on PROFINET IO, data is
being exchanged.
SYNC *) Green
Flashing
(0.5 Hz)
Task system of the SINUMERIK 828D has synchronized to the
clock of the PLC I/O interface based on PROFINET IO, data is
being cyclically exchanged.
See also
Additional connections at the rear of the PPU:
● System versions horizonta
l and vertical (Page 15)
● System versions, BASIC T and BASIC M (Page 17)
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