Siemens SITRANS 7MF03.0 - Page 16

ID Symbols Message Cause/Remedy
bL Device restart due to unex‐
pected program error
Maintenance alarm
Watchdog function of the pressure transmitter has detected an internal de‐
vice error.
Unknown hardware or 󹪝rmware error.
Restart the device.
If the problem persists, replace the transmitter electronics or the sensor elec‐
tronics.
bn Alarm sensor limit excee‐
ded
Process value alarm
Process value has reached the sensor limit.
Review process conditions versus product speci󹪝cations.
bS Event counter 2
Number underruns above
threshold
Maintenance alarm
The number of underruns of the process value (set in parameters "Lower
limit" and "Monitored value") has reached the threshold.
Reset and acknowledge event counter.
Check process conditions.
Check limit monitoring and event counter settings.
CA Simulation mode

The device is in simulation mode and one or more of its device variables are
not representative of the process.
Disable the simulation to return to normal operation.
Cb Diagnostics simulated
Simulation mode

The device is in simulation mode.
Disable the simulation to return to normal operation.
Co Loop current 󹪝xed
Manual operation
The loop current is being held at a 󹪝xed value and is not responding to process
variations.
Enter the loop current output value for simulation.
Disable the simulation to return to normal operation.
CP Loop current in saturation
Process value warning

The loop current has reached its upper (or lower) saturation limit and cannot
increase (or decrease) any further.
Adjust loop current scaling.
CU PV status: uncertain
Process value alarm
The value is outside of the physical sensor range. Accuracy may decrease.
Check for changes in process conditions or obstructions in vessel.
CY PV status: bad
Maintenance alarm
The measured value is 10% higher than the physical sensor range.
Review process conditions versus product speci󹪝cations.
Use a device that ful󹪝lls your process conditions.
Diagnostics and troubleshooting
4.1Diagnostic messages
SITRANS P320/P420
16 Service Manual, 11/2023, A5E44914141-AC