Foundation Fieldbus Transmitters - K-TEK AccuTrak AT100 Installation & Operation Manual

6.0 SAFETY, MAINTENANCE, AND TROUBLESHOOTING

6.6 Foundation Fieldbus Transmitters

Foundation Fieldbus transmitters operate using the same level measurement techniques as 4-20mA
transmitters. This troubleshooting section only covers problems specific to Foundation Fieldbus setup and
communications. Troubleshooting of the level indication from the Transducer Block may require the use of the 4-
20mA, HART troubleshooting section.
Symptom
Current output does not Per the Foundation Fieldbus standard, each instrument must have a quiescent current draw. The
change with level quiescent current draw of an AT100 transmitter is 12.5mA. There is not a problem with the transmitter.
change
LCD does not match AI The information displayed on the LCD is supplied by the Transducer Block. This information will be
Block output mapped through the AI Block for use in the network. There is not a problem with the transmitter.
Unable to load a DD Files not in the host
configuration to the system
transmitter
Transmitter does not Terminal Strip Failure
communicate through
FF
AI Block output does Transmitter in Simulate Mode
not correspond to level
change
Faulty AI Block configuration
BLOCK_ERR XD_SCALE does not have a
Block Configuration suitable engineering unit
Error
XD_SCALE does not contain a
valid range
L_TYPE is invalid
Out of Service
AT100-0200-1 Rev L (10-2010) DCN0528
Possible Problem
DD Files for the AT100 transmitter are available for download at
www.fieldbus.org. DD Files must be installed for proper transmitter
operation within the network.
Follow the procedure in Section 6.7 to verify terminal strip failure. If
the terminal strip is faulty, contact the factory for replacement parts
and procedures.
Move the Simulate Mode jumper (front of the module) to the upper
position and cycle the power
Set the value of SIMULATE (AI Block) to "Disable"
Review the AI Block configuration to confirm the required output will
be generated
Ensure the engineering unit used in the XD_SCALE is a valid linear
measurement unit
The range of the XD_SCALE cannot exceed the SENSOR_RANGE.
If it is required to have the XD_SCALE exceed the SENSOR_RANGE,
the values of the scaling can be adjusted to correspond to the
SENSOR_RANGE and the excess will be extrapolated on each end of
the range.
Review the AI Block configuration to confirm the required output will
be generated. To use XD_SCALE the L_TYPE must be set to
INDIRECT
Ensure the MODE_BLK is set to AUTO
Solution
24