1Foundation Fieldbus - Emerson Rosemount Reference Manual

Reference Manual
00809-0100-4021, Rev GC
4.11.1 F
OUNDATION
If a malfunction is suspected despite the absence of a diagnostics message, follow the
procedures described in
are in good working order. Under each of the symptoms, specific suggestions for solving
problems are offered. Always deal with the most likely and easiest-to-check conditions first.
Table 4-12. F
OUNDATION
Symptom
Transmitter does not
Communicate with the
Configuration Interface
High Output
Erratic Output
Low Output or No
Output
Foundation™ fieldbus configuration
fieldbus
Table 4-12
fieldbus Troubleshooting
Potential source Corrective action
Loop Wiring
•Check for adequate voltage to the transmitter. The transmitter requires
between 9.0 and 32.0 V at the terminals to operate and provide
complete functionality
•Check for intermittent wire shorts, open circuits, and multiple grounds.
Network
•See
parameters
Sensor Input
•Enter the transmitter test mode to isolate a sensor failure.
Failure or
•Check for a sensor open circuit.
Connection
•Check the process variable to see if it is out of range.
Loop Wiring
•Check for dirty or defective terminals, interconnecting pins, or
receptacles.
Electronics Module
•Enter the transmitter test mode to isolate a module failure.
•Check the sensor limits to ensure calibration adjustments are within the
sensor range.
Loop Wiring
•Check for adequate voltage to the transmitter. The transmitter requires
between 9.0 and 32.0 V at the terminals to operate and provide
complete functionality.
•Check for intermittent wire shorts, open circuits, and multiple grounds.
Electronics Module
•Enter the transmitter test mode to isolate module failure.
Sensor Element
•Enter the transmitter test mode to isolate a sensor failure.
•Check the process variable to see if it is out of range.
Loop Wiring
•Check for adequate voltage to the transmitter. The transmitter requires
between 9.0 and 32.0 V at the terminals to operate and provide
complete functionality.
•Check for wire shorts and multiple grounds.
•Check the loop impedance.
•Check wire insulation to detect possible shorts to ground.
Electronics Module
•Check the sensor limits to ensure calibration adjustments are within the
sensor range.
•Enter the transmitter test mode to isolate an electronics module failure.
Section 4: F
to verify that transmitter hardware and process connections
"Failure mode switch" on page 188
fieldbus Configuration
OUNDATION
.
April 2014
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