Alarm and System Status Overview
Bits are numbered from right to left, starting with Bit 0 on the far right. A bit value of 1 indicates an active alarm or status. Refer to the table below for system status descriptions.
Alarm - A: Critical Failure
The system classifies this alarm according to the “Failed” severity level as defined in the NAMUR NE107 standard.
This alarm is triggered under the following fault conditions:
Paddlewheel malfunction
Magnetic field interference
Internal chip or sensor error
When Alarm - A is active, the LCD backlight flashes red to indicate a critical system failure.
7
NA
6
NA
5
NA
4
NA
3
NA
2
NA
1
Magnetic field interference
D02
Strong magnetic field detected near the device, interfering with AxleSense sensing.
0
Paddle wheel abnormality
D01
Paddle rotation cannot be detected. Verify the paddlewheel is rotating freely, the pipe is filled with liquid, and the paddlewheel assembly is undamaged.
Alarm - B: Out of Specification
This alarm indicates that the flow meter is operating outside of its designed specification range. The severity level is recommended to follow the “Out of Specification” category as defined in the NAMUR NE107 standard.
This alarm is typically used to signal:
Flow exceeding user-defined thresholds
Other notable operating conditions that require attention
The thresholds and logic can be configured in the D-series parameters.
When Alarm - B is active, the LCD backlight turns solid red, indicating a non-critical but attention-required condition.
Alarm bit
Error Content
Alarm Code
Alarm trigger
7
NA
6
Totalised Flow Exceeds Target
D08
Totalized flow exceeds or falls below the preset target*
5
Value exceeds analog output upper limit
D11
The output value exceeds the analog output upper limit
4
Value exceeds analog output lower limit
D11
The output value falls below the analog output lower limit
3
NA
2
Pulse Overlap
D13
Paddlewheel pulse frequency is too high; consecutive pulse signals overlap.
1
Instantaneous flow above upper limit
D04
Instantaneous flowrate exceeds the upper limit
0
Instantaneous flow below lower limit
D04
Instantaneous flowrate falls below the lower limit
* Configure via D08 Total Ala, D09 Total Trig, and D10 Total Target.
D04 FlowLIM Ala default setting is Off (value = 0). Set D04 to On (1) or Do not disturb (2) to enable flow limit alarm monitoring. Refer to the D Alarm & Info parameter section for full configuration details.
Alarm - C: Maintenance Required
This alarm indicates that the flow meter requires maintenance. The recommended severity level follows the “Maintenance Required” classification as defined in the NAMUR NE107 standard.
When Alarm - C is active, the LCD backlight remains solid red, alerting the user to perform preventive or corrective maintenance.
Alarm bit
Error Content
Alarm Code
Alarm trigger
7
NA
6
NA
5
NA
4
NA
3
NA
2
NA
1
Iout(0/4-20mA) impedance is too large or there is no connection
D14
Analog output (4–20 mA) line resistance is too high, or the wiring is disconnected. Check all analog output wiring connections.
0
NA
D14 IoutStatAla default setting is Off (value = 0). Set D14 to On (1) or Do not disturb (2) to enable analog output line monitoring. This parameter is new in firmware P1002.
Alarm - D: Function Check
This alarm indicates that the device is currently undergoing configuration, simulation, or other manual intervention and is not actively monitoring in real time.
The recommended severity level follows the “Function Check” category as defined in the NAMUR NE107 standard.
When this condition is active, bit 1 of the alarm register is set to 1, indicating the system is not in monitoring mode due to user interaction.
During this state, the LCD backlight will remain solid amber (orange) to indicate the flow meter is in a non-operational configuration mode.
Alarm bit
Error Content
Alarm Code
Alarm trigger
7
NA
6
NA
5
NA
4
NA
3
NA
2
NA
1
NA
0
The host is not on the monitoring screen
NA
System Status
The system status is represented as an 0~7 bit status code, with each bit indicating a specific operating condition or state of the device.
Alarm bit
Error Content
Alarm Code
Alarm trigger
7
NA
6
NA
5
NA
4
NA
3
NA
2
NA
1
NA
0
NPN On State
NPN status:
NC - Normally Closed (allows current flow) shows “1”
NO - Normally Open (no current flow) shows “0”
Not including Paddle Pulse status
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