H.13 Fieldbus troubleshooting guide
See
Table 42
below for suggested solution to possible Fieldbus problems.
Table 42: 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
124
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