Fisher FIELDVUE DVC6200p Instruction Manual page 57

Instruction Manual
D103563X012
Table 6‐2. Instrument Troubleshooting
Symptom
1 Instrument will not communicate.
2 Device does not stay on segment.
3 A value cannot be written to a
parameter.
4 Function block actual mode does not
change with target mode.
Possible Cause
1a No power to device
1b Internal device wiring problems.
1c Incompatible network settings
1d Defective printed wiring board (PWB) assembly.
1e Defective terminal box.
2a Incorrect signal level.
2b Excess noise on segment.
2c Electronics failing.
3a Physical block parameter Write Lock may be set to
Locked.
3b If a transducer block parameter, the mode may be
incorrect or the parameter may be protected.
3c You have attempted to write a value that is outside
the valid range.
3d Function block or in/out block mode may be
incorrect.
4a Physical block actual mode is Out of Service.
4b Transducer block actual mode is not Auto.
4c Schedules that define when function blocks execute
are not set correctly.
4d Configuration error
Maintenance and Troubleshooting
Action
1a1 Ensure device is connected to the segment (see
host system documentation).
1a2 Measure the terminal voltage. Terminal voltage
should be between 9 and 32 VDC.
1a3 Check to be sure device is drawing current. There
should be approximately 19 mA.
1b1 Verify connectors are plugged into the printed
wiring board correctly (see Printed Wiring Board
Assembly on page 51).
1b2 Check continuity of cable between terminal box
and printed wiring board. If necessary, replace the
terminal box assembly (see page 53).
1b3 Check for damaged printed wiring board lands and
terminals. If necessary, replace the terminal box
assembly (see page 53).
1c Change host parameters. Refer to host
documentation for procedure.
1d Replace printed wiring board (see page 51).
1e Check continuity from each screw terminal to the
corresponding PWB connector pin. If necessary, replace
the terminal box assembly (see page 53).
2a1 Check that segment is properly terminated (see
host system documentation).
2a2 Wrong cable type or segment length too long.
2a3 Bad power supply or conditioner.
2b1 Check integrity of wiring connections. Follow
PROFIBUS PA wiring guidelines.
2b2 Check for corrosion or moisture on terminals in
terminal box (refer to page 53 for terminal box
maintenance information).
2b3 Check for bad power supply.
2c. Replace printed wiring board assembly (see
Replacing the PWB Assembly on page 51).
3a Change Write Lock to Not Locked (refer to page 26).
3b1 Check table C‐3. If necessary change the
transducer block target mode.
3b2 Check table C‐3. If necessary change data
protection.
3c Check the range values listed for the parameter
(refer to the parameter tables in Appendix C).
3.d. Confirm that block is in correct mode for writing to
any given parameter.
4a Change Physical block target mode to Auto (refer to
the Physical Block tab under Manual Setup > Classic
View or to host system documentation).
4b Change transducer block target mode to Auto (see
page 13, Transducer Block Mode, refer to the
Transducer Block tab under Manual Setup > Classic
View or to host system documentation).
4c Set the schedules using host system or
configuration tool. All function blocks must be in a
schedule that is downloaded to the device.
4d Look for configuration error bit in BLOCK_ERR. By
default, all enumerature type parameters are initialized
to 0 (undefined). They must be configured before the
block can be put into service.
June 2017
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