Signal Level Is Too High; Signal Level Of One Or More Devices Is Too High; Signal Level Of One Or More Devices Is Too Low For The Given Topology; Topology Error - Installed Topology Does Not Match Configured Topology - Pepperl+Fuchs HD2-DM-A Manual

Advanced Diagnostics
Appendix
ID
115
116
117
120
121
122
123
174
Phenomenon
Signal level of one device
is too low for the given
topology, signal level of
others OK
Signal level of one device
is too high for the given
topology
Segment voltage is too low Terminal failure: corrosion

Signal level is too high,

only host is active and seg-
ment is powered
Signal level of one or more
devices is too high
Signal level of one or more
devices is too low for the
given topology
Voltage of Bulk Power Sup-
ply (Primary or Second-
ary) is "Out of
specification"
Cause(s)
Device malfunction: Signal
level is too low
Too many terminators
Measurement executed at
spur
Topology error - non-work-
ing topology
Cable resistance is too
high
Topology error - installed
topology does not match
configured topology
Trunk breakage between
fieldbus power supply and
first device coupler
Not enough terminators
Trunk breakage between
device couplers
Topology error - installed
topology does not match
configured topology
Too many terminators
Terminal failure: corrosion
Cable resistance is too
high
Topology error - installed
topology does not match
configured topology
Bulk power supply voltage
error
Action(s)
Replace device
Check that one terminator
is installed on each end of
the trunk cable, but no
more than these two in total
Connect to proper mea-
surement point
Check if the resistance of
any terminal is too high
Check if the topology is
valid according to the field-
bus specification
Check if the correct cable
is installed and the cable
can be used for the topol-
ogy
Check that the topology
settings match the installa-
tion
Check trunk, fieldbus
power supply terminals
and first device coupler
Check if a terminator is
installed on both ends of
the trunk
Check trunk cable and
device coupler terminals
Check that the topology
settings match the installa-
tion
Check that one terminator
is installed on each end of
the trunk cable, but no
more than these two in total
Check if the resistance of
any terminal is too high
Check if the correct cable
is installed and the cable
can be used for the topol-
ogy
Check that the topology
settings match the installa-
tion
Check and correct voltage
of bulk power supply