
D.12 Fieldbus troubleshooting guide
See
table 11
below for suggested solution to possible fieldbus problems.
Table 11: XMT1000 FF troubleshooting guide
Problem
Presumed Cause
Remedy
Communication
between DCS and
XMT1000 FF cannot
be established
Wiring unconnected, broken or shorted
Correct wiring between XMT1000 and spur
device coupler.
The power is off or the power supply
voltage is less than 9 V
Supply proper voltage
The address detection range is not
correctly set in the DCS
Correct address detection range - default
address for XMT1000 is 0x17
Communication with
the XMT1000 FF is
frequently cut off.
The fieldbus is experiencing a large
amount of noise.
Using an oscilloscope or another fieldbus
health monitor to check the waveform on
the fieldbus.
Missing terminators on the bus, incorrect
terminator placement or extra terminators.
Refer to FOUNDATION fieldbus specifications for
a full discussion of terminator requirements.
A value cannot be
written to a parameter
in the XMT1000 FF.
Not in configuration mode.
Enter correct “admin” password in resource
block - verify “S1 - configuration mode”
appears on XMT1000 UI
You have attempted to write a value
outside the valid range.
Check the setting range of parameters.
The present mode does not allow
write access.
Change the target mode.
The jumper is in write protected
configuration.
Contact factory for write protect jumper
configuration
The actual mode
of a function block
differs from the
target mode.
Resource block in OOS.
Change the target mode of the resource block
to auto.
Schedules that define when function blocks
execute are not set correctly.
Set the schedules using a configuration tool.
The transducer block is not in auto mode.
Change the target mode of the transducer
block to auto.
A block’s dynamic
parameters do not
update.
XMT1000 is powered down
Verify the XMT1000 is powered on and
measuring properly
XMT1000 does not recognize the FF PCB
Check Options menu on XMT1000 UI for
fieldbus option - if it appears the meter knows
it is present
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