Emerson Rosemount OCX8800A Manual page 126

F Fieldbus
™
OUNDATION
December 2022
Line Input Out of Range
The Device Alerts AMS tab or the transducer block may display one of the
following alarms:
1. Line Frequency Error
2. Line Voltage Low
3. Line Voltage High
This alert indicates that the line power to the transmitter is outside the proper
operating limits.
Potential cause
The transmitter power supply continuously monitors the line input. Measured
variations in the line input power are used to compensate the sensor heater
control to check for faulty line conditions. Refer to
Recommended action
Check line input power for proper voltage and frequency.
Inter Board Communication Failure
The FF/Device Alerts AMS tab or the transducer block may display the alarm:
Inter Board Communication Failure
failure between the F
Potential cause
There is no communication possible between the Fieldbus output board and the
transmitter's computer board.
Recommended actions
Simulate Active
This alert may display on the FF/Device Alerts AMS tab. This alert occurs when the
PWA simulate mode is active. You can now write the PWA active parameters. You
can also write the resource block detailed status parameters and the internal
alerts in the transducer block where the PWA active alarms originate.
126
2. Replace electronics stack.
OUNDATION
1. Verify the transmitter is powered.
2. Check the installation of the Fieldbus output board on its carrier board.
3. If the above are OK, replace the carrier board and/or Fieldbus output
board.
Diagnostic alarms
. This alert indicates a communication
Fieldbus (FF) board and the transmitter.
™
Manual
00809-0500-4880
for details.
Emerson.com/Rosemount