Specifications

SQ: 1-41
RS3: Service Quick Reference Guide
Troubleshooting
Serial (MPC) I/O Troubleshooting (continued)
Condition Action
Analog output
Feedback check alarm
1. Remove the field wiring from the marshaling panel
for this FIC. Connect a Rosemount 262 Field
Calibrator (or similar device) to the terminals. Put
the AOB in MANUAL and enter an output value of
50.00%. Check the Actual Value reading on the
AOB (it should be 50%) and verify that the
Rosemount 262 meter reading is also 50% (12
mA).
2. If the A ctual Value Reading and the meter reading
are not 50%:
Check all fuses on the output FIC.
Calibrate the point.
Replace the FIC.
Replace the controller.
3. If the A ctual Value and meter readings are 50%
and the alarm clears off the Active Hardware Alarm
List, the problem is an open circuit in the field
wiring or the field device.
(continued on next page)