Appendix
2
02
0-
11
179
167
Segment voltage is lower
compared to commission
-
ing
Terminal failure: corrosion Check if the resistance of
any terminal is too high
Fieldbus power supply
replaced with incompatible
model
Install correct fieldbus
power supply
Fieldbus power supply
failed
Check and replace fieldbus
power supply
Fieldbus power supply
overload
Check if there is any con
-
nection between fi
and fieldbus - or remove
devices
169
Segment voltage is "Out of
specification"
Fieldbus power supply
failed
Check and replace fieldbus
power supply
171
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
172
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
173
Segment voltage is "Out of
specification"
Fieldbus power supply
failed
Check and replace fieldbus
power supply
174
Segment voltage is too low Fieldbus power supply
failed
Check and replace fieldbus
power supply
Terminal failure: corrosion Check if the resistance of
any terminal is too high
Topology error - non-work
-
ing topology
Check if the topology is
valid according to the field
-
bus specification
175
Segment voltage is too
low: "Out of specification"
Terminal failure: corrosion Check if the resistance of
any terminal is too high
Fieldbus power supply
failed
Check and replace fieldbus
power supply
Fieldbus power supply
replaced with incompatible
model
Install correct fieldbus
power supply
Topology error - non-work
-
ing topology
Check if the topology is
valid according to the field
-
bus specification
Diagnostic device is
wrongly or not connected
to the segment
Check wiring connection to
the segment
ID
Phenomenon
Cause(s)
Action(s)