Emerson Fisher FIELDVUE DVC6000f Instruction Manual page 281

Instrument Troubleshooting
What to Do First
When a problem occurs, check the following first:
Mounting
D Is the feedback linkage connected correctly? See
the beginning of this section.
Utility Connections
D Are pneumatic connections correct? Are there
any air leaks? See the Installation section.
D Is the air supply pressure sufficient to drive the
valve?
Symptom
1. Instrument will not communicate.
December 2009
Maintenance and Troubleshooting
Table 7-2. Instrument Troubleshooting
Possible Cause
1.a No power to device
1.b Internal device wiring problems.
1.c Incompatible network settings
1.d Defective printed wiring board (PWB) assembly.
1.e Defective terminal box.
1.f Defective Field Communicator or ValveLink
modem cable.
1.g Fieldbus card defective or not compatible with PC.
−Continued−
D Is the digital valve controller correctly connected
to the fieldbus? See the Installation section.
D Is there power to the device? Is the terminal
voltage between 9 and 32 volts? See the Installation
section.
D Is the segment terminated correctly? See host
system documentation.
D Is the host system connected to the segment?
See host system documentation.
If communication or output difficulties are experienced
with the instrument, refer to the troubleshooting
information provided in table 7-2.
Also see the Troubleshooting Checklist found on page
7-20.
1.a1 Ensure device is connected to the segment (see
host system documentation).
1.a2 Measure the terminal voltage. Terminal voltage
should be between 9 and 32 VDC.
1.a3 Check to be sure device is drawing current.
There should be approximately 19 mA.
1.b1 Verify connectors are plugged into the printed
wiring board correctly (see Printed Wiring Board
Assembly on page 7-7).
1.b2 Check continuity of cable between terminal box
and printed wiring board. If necessary, replace the
terminal box assembly (see Replacing the Terminal
Box on page 7-9).
1.b3 Check for damaged printed wiring board lands
and terminals. If necessary, replace the terminal box
assembly (see Replacing the Terminal Box on page
7-9).
1.c Change host parameters. Refer to host
documentation for procedure.
1.d Replace printed wiring board (see Replacing the
PWB Assembly on page 7-7).
1.e Check continuity from each screw terminal to the
corresponding PWB connector pin. If necessary,
replace the terminal box assembly (see Replacing the
Terminal Box on page 7-9).
1.f If necessary, repair or replace cable.
1.g Replace Fieldbus card.
Action
7
7-15