Check That The Topology Settings Match The Installa- Tion; Check That One Terminator; Is Installed On Each End Of; The Trunk Cable, But No - Pepperl+Fuchs HD2-DM-A Manual

Advanced Diagnostics
Appendix
ID
292
293
294
295
190
Phenomenon
"Out of specification" alarm
of a device coupler
detected for several
devices
Signal level of one device
is too low for the given
topology, signal level of
others OK
Signal level of one or more
devices is too low for the
given topology
Signal level of one or more
devices is too high
Cause(s)
Spur short circuit
The spurs of missing
devices or an empty spur
shows bad current
changes
The maximum power rating
of the device coupler is
exceeded
An ELS or a surge protec-
tor sends an alarm. Device
coupler LED should blink
three times
ELS sends alarm. The
device coupler LED should
blink three times
An empty spur is short cir-
cuited or shows bad cur-
rent changes
A diagnostic value exceeds
defined value. The device
coupler LED should blink
two times
Device malfunction: Signal
level is too low
Too many terminators
Too many terminators
Terminal failure: corrosion
Cable resistance is too
high
Topology error - installed
topology does not match
configured topology
Device coupler failed
2 devices connected to a
spur
Not enough terminators
Topology error - installed
topology does not match
configured topology
Action(s)
Check spur of the missing
device
Check cable connections
and devices at the affected
spur
Reduce power consump-
tion of devices connected
to the device coupler
Check device sending the
alarm and check any ELS
and surge protectors con-
nected to it
Check ELS of the device
coupler with active alarms
Check empty spurs of the
corresponding device cou-
pler
Check the device coupler
manual for details
Replace device

Check that one terminator

is installed on each end of

the trunk cable, but no

more than these two in total

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 device couplers and
device coupler terminals
Connect only one device to
a spur
Check if a terminator is
installed on both ends of
the trunk
Check that the topology
settings match the installa-
tion