Emerson Rosemount, Reference Manual

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169
Reference Manual
00809-0100-4021, Rev GC
Section 4: F
OUNDATION
fieldbus Configuration
April 2014
Foundation™ fieldbus configuration
Table 4-11. Troubleshooting guide
Symptom
(1)
(1) The corrective actions should be done with consultation of your system integrator.
Cause Recommended actions
Device does not show
up on segment
Unknown Recycle power to device
No power to device 1. Ensure the device is connected to the segment.
2. Check voltage at terminals. There should be 9–32 Vdc.
3. Check to ensure the device is drawing current. There
should be approximately 11 mA.
Segment problems 1. Check wiring (see Figure 2-13 on page 23 ).
Electronics failing 1. Replace device.
Incompatible network settings 1. Change host network parameters (refer to host
documentation for procedure).
Device does not stay
on segment
(2)
(2) Wiring and installation 31.25 kbit/s, voltage mode, wire medium application guide AG-140 available from the F
OUNDATION
fieldbus .
Incorrect signal levels.
Refer to host documentation for
procedure.
1. Check for two terminators.
2. Excess cable length.
3. Bad Power supply or conditioner
Excess noise on segment.
Refer to host documentation for
procedure.
1. Check for incorrect grounding.
2. Check for correct shielded wire.
3. Tighten wire connections.
4. Check for corrosion or moisture on terminals.
5. Check for Bad power supply.
Electronics failing 1. Replace device.
Other 1. Check for water around the transmitter.