Pepperl+Fuchs HD2-DM-A, Руководство пользователя

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Advanced Diagnostics
Appendix
134 Noise of one device is "Out
of specification", noise is
not "Out of specification"
for other devices
Device injects noise Check noise with the field -
bus oscilloscope. The
device showing high noise
values is not necessarily
the one injecting the noise.
135 Jitter of one device is "Out
of specification", jitter is not
"Out of specification" for
other devices
Device malfunction: jitter of
a device is too high
Replace device
Not enough terminators Check if a terminator is
installed on both ends of
the trunk
Fieldbus impedance fault Check if the fieldbus topol -
ogy is valid. Check noise,
reduce high noise values.
136 Signal level of one device
is too low for the given
topology, signal level of
others is OK
Device malfunction: Signal
level is too low
Replace device
Too many terminators Check that one terminator
is installed on each end of
the trunk cable, but no
more than these two in total
137 Segment powered and OK
but no communication
detected
Host/LAS/master commu -
nication fault
Check host/LAS/master
No host connected Check if the host is
installed and correctly con -
nected to the segment
138 Segment Power Supply
Module (A or B) not
installed
Segment Power Supply
Module (A or B) not
installed
Install Segment Power
Supply Module (A or B) on
the motherboard
140 Noise is "Out of specifica -
tion" for the segment
Shield wiring / grounding
fault
Check fieldbus cable for
correct shielding and
grounding.
Noise injection on the field -
bus
Check fieldbus cable for
correct shielding and
grounding. Check for exter -
nal noise sources.
141 Jitter is "Out of specifica -
tion" for the segment
Fieldbus impedance fault Check if the fieldbus topol -
ogy is valid. Check noise,
reduce high noise values.
Wrong cable type, cable
impedance not correct
Check if the correct cable
is installed and the cable
can be used for the topol -
ogy
Not enough terminators Check if a terminator is
installed on both ends of
the trunk
142 Current is too high for the
fieldbus power supply
Fieldbus power supply
overload
Check if there is any con -
nection between fi
and fieldbus - or remove
devices
144 Signal level is too high,
only host is active and seg -
ment is powered
Trunk breakage between
fieldbus power supply and
first device coupler
Check trunk, fieldbus
power supply terminals
and first device coupler
145 Signal level of one or more
devices is too high and
devices are missing com -
pared to commissioning
Trunk breakage between
device couplers
Check trunk cable and
device coupler terminals
Not enough terminators Check if a terminator is
installed on both ends of
the trunk
ID Phenomenon Cause(s) Action(s)