Alarms and System Status - A

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 main screen LCD backlight flashes red, indicating a critical system failure.

Alarm A Error Code Definition: Bits are defined from MSB (Bit 7) to LSB (Bit 0), with each bit representing the following:

Bit	Alarm Definition	Alarm Code	Trigger Condition
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	Paddlewheel 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.

ⓘ D01 Paddle Ala default is Do Not Disturb (value = 2). In this mode, the alarm bit is recorded in the error code register but the LCD backlight will not change color. Set D01 to On (value = 1) to enable LCD alarm color indication.

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

• Analog output value outside the configured range

• Other abnormal operating conditions requiring attention

Thresholds and logic are configured under the D parameter category.

When Alarm B is active, the main screen LCD backlight turns solid red, indicating a non-critical condition that requires attention.

Alarm B Error Code Definition: Bits are defined from MSB (Bit 7) to LSB (Bit 0), with each bit representing the following:

Bit	Alarm Definition	Alarm Code	Trigger Condition
7	NA
6	Totalized flow alarm	D08	Totalized flow exceeds or falls below the preset target *Note
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

* Note:

D08, D09, D10 Cumulative Alarm Description

Example 1: Positive Flow
Enable the D08 cumulative alarm, and set the D09 cumulative condition to "Greater than target".
Set the D10 cumulative target to a positive number, such as +100.
When the cumulative positive flow exceeds 100, the system will trigger the cumulative alarm.

Example 2: Negative Flow
Enable the D08 cumulative alarm, and set the D09 cumulative condition to "Less than target".
Set the D10 cumulative target to a negative number, such as -500.
When the cumulative negative flow is less than -500, the system will trigger the cumulative alarm.

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 main screen LCD backlight turns solid red, prompting the user to perform preventive or corrective maintenance.

Alarm C Error Code Definition: Bits are defined from MSB (Bit 7) to LSB (Bit 0), with each bit representing the following:

Bit	Alarm Definition	Alarm Code	Trigger Condition
7	NA
6	NA
5	NA
4	NA
3	NA
2	NA
1	Analog Output Line Fault	D14	Analog output (4-20mA) 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 in setup, simulation, or another manual operation and is not in real-time monitoring. The severity level is aligned with the "Function Check" category defined in NAMUR NE107.

When this state is active, Bit 0 of the alarm register is set to 1, indicating the system is not in monitoring mode due to a user operation.

During this state, the LCD backlight will remain solid amber (orange) to indicate the flow meter is in a non-operational configuration mode.

ⓘ Alarm D does not appear as a row on the LCD alarm display screen. The amber backlight is the only on-screen indicator. This state is also readable via Modbus at register address 0x0011 (error code d), Bit 0.

Bit	Alarm Definition	Alarm Code	Trigger Condition
7	NA
6	NA
5	NA
4	NA
3	NA
2	NA
1	NA
0	Main Unit Not on Monitoring Screen	NA	Main unit is in the settings menu, simulation mode, or another manual operation, and is not displaying the main monitoring screen.

System Status

The System Status is represented by an 8-bit status code (Bits 0–7), with each bit independently indicating a specific operating state of the device.

Status codes are defined from MSB (Bit 7) to LSB (Bit 0), with each bit representing the following:

Bit	Alarm Definition	Alarm Code	Trigger Condition
7	NA
6	NA
5	NA
4	NA
3	NA
2	NA
1	NA
0	NPN On State	E01	NPN status: NC - Normally Closed (allows current flow) shows “1”. NO - Normally Open (no current flow) shows “0”. Note: This does not include Paddle Pulse status.