Restart Processor - Fisher FIELDVUE DVC6200 Instruction Manual

Maintenance and Troubleshooting
February 2017
5. Adjust the resistance of the 1 kilohm potentiometer until the voltage read on the voltmeter is 10.0 volts.
6. Record the current shown on the milliammeter.
7. If the current recorded in step 6 is the same as that recorded in step 4 (± 0.08 mA), the voltage available is
adequate.
8. If the voltage available is inadequate, refer to Wiring Practices in the Installation section.

Restart Processor

This is a "soft" reset of the device. This procedure can only be performed while the instrument is out of service. A soft
reset will immediately put into effect changes that have been sent to the instrument. Also, if the device is configured
to shutdown on an alert, the soft reset will clear the shutdown.
Table 6‐3. Instrument Troubleshooting
Symptom
1. Analog input reading at
1a. Control mode not Analog.
instrument does not match
actual current provided.
1b. Low control system compliance voltage.
1c. Instrument shutdown due to self test failure.
1d. Analog input sensor not calibrated.
1e. Current leakage.
2. Instrument will not 2a. Insufficient Voltage Available.
communicate.
2b. Controller output Impedance too low.
2c. Cable capacitance too high.
2d. HART filter improperly adjusted.
2e. Improper field wiring.
2f. Controller output providing less than 4 mA to loop.
2g. Disconnected loop wiring cable at PWB.
2h. PWB DIP switch not set properly.
66
Possible Cause
Instruction Manual
Action
1a. Check the control mode using the Field Communicator. If in
the Digital or Test mode, the instrument receives its set point as
a digital signal. Control is not based on input current. Change
Control Mode to Analog.
1b. Check system compliance voltage (see Wiring Practices in
the Installation section.
1c. Check instrument status using the Field Communicator (see
Viewing Instrument Status in the Viewing Device Information
section).
1d. Calibrate the analog input sensor (see Analog Input
Calibration in the Calibration section).
1e. Excessive moisture in the terminal box can cause current
leakage. Typically the current will vary randomly if this is the
case. Allow the inside of the terminal box to dry, then retest.
2a. Calculate Voltage Available (see Wiring Practices in the
Installation section). Voltage Available should be greater than or
equal to 10 VDC.
2b. Install a HART filter after reviewing Control System
Compliance Voltage requirements (see Wiring Practices in the
Installation section).
2c. Review maximum cable capacitance limits (see Wiring
Practices in the Installation section).
2d. Check filter adjustment (see the appropriate HART filter
instruction manual).
2e. Check polarity of wiring and integrity of connections. Make
sure cable shield is grounded only at the control system.
2f. Check control system minimum output setting, which should
not be less than 3.8 mA.
2g. Verify connectors are plugged in correctly.
2h. Check for incorrect setting or broken DIP switch on the back
of the PWB. Reset switch or replace PWB, if switch is broken. See
table 6‐2 for switch setting information
D103605X012