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02
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172
Appendix
8.5
Expert System Phenomena IDs
6
IO Out of Specifica
-
tion
Any bit in IO_TB.FD_OOS_ACTIVE is
set when IO_TB has a target mode of
"AUTO".
Offspec
7
IO Maintenance
Required
Any bit in IO_TB.FD_MR_ACTIVE is set
when IO_TB has a target mode of
"AUTO".
Maintenance
Required
8
IO Fail
Any bit in IO_TB BINARY_ERRORS or
ANALOG_ERRORS is set when IO_TB
has a target mode of "AUTO".
Fail
9
Block Configura
-
tion error
Any transducer block with target mode
"AUTO" of the device shows a block con
-
figuration error.
Maintenance
Required
10 ... 31 Not used
Bit
Name
Description
Default Mapping
ID
Phenomenon
Cause(s)
Action(s)
101
Signal level is too high,
only host communication
and segment power are
detected
Trunk breakage between
fieldbus power supply and
first device coupler
Check trunk, fieldbus
power supply terminals
and first device coupler
102
Signal level of one or more
devices is too high
Not enough terminators
Check if a terminator is
installed on both ends of
the trunk
Trunk breakage between
device couplers
Check trunk cable and
device coupler terminals
Topology error - installed
topology does not match
configured topology
Check that the topology
settings match the installa
-
tion
103
Signal level of one or more
devices is too low for the
given topology
Too many terminators
Check that one terminator
is installed on each end of
the trunk cable, but no
more than these two in total
Terminal failure: corrosion Check if the resistance of
any terminal is too high
Cable resistance is too
high
Check if the correct cable
is installed and the cable
can be used for the topol
-
ogy
Topology error - installed
topology does not match
configured topology
Check that the topology
settings match the installa
-
tion
104
Segment voltage is mea
-
sured as zero. Segment is
unpowered
Fieldbus power supply
failed
Replace fieldbus power
supply module
Bulk power supply failed
Check bulk power supply
Fieldbus power supply
removed
Install fieldbus power sup
-
ply
Cable breakage, short cir
-
cuit or terminal connection
failure
Check cabling and termi
-
nals
Diagnostic device is
wrongly or not connected
to the segment
Check wiring connection to
the segment
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