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The following table provides an overview:
Table 4: Overview of ID 40/SLK read/write head displays
Display range Displaying Remark Example
Area 2 System activity The SLK operating system
is active when the bar in
the fourth display seg-
ment rotates.
Area 2 Fieldbus activity The bottom half of the
display segment contains
symbols indicating the
status of the fieldbus.
Their appearance and
meaning depend on the
fieldbus. See Chapters 8
to 10 for more details.
Area 1 Actual link state See Chapter 2.2.1
“SLK operating states”
Area 1 Error state with error
number
See Chapter 12.1
“Troubleshooting guide”
for meaning
Area 1 and
area 2
Fieldbus node number Only shown during boot
up and consists of the
fieldbus code letter and
three-digit node number
Area 1 and
area 2 flashing
Fatal error,
system stopped
See Chapter 12.1.2
“Fatal system errors” for
meaning
PROOF COPY 1 | 20.05.2014 | FOR INTERNAL USE ONLY
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