# Alarm and System Status Overview

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{% hint style="info" %}
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.
{% endhint %}

### **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**.

<table><thead><tr><th width="84.08856201171875">Bit</th><th>Alarm Condition</th><th>Alarm Code</th><th>Trigger Condition</th></tr></thead><tbody><tr><td>7</td><td>　NA</td><td></td><td>　</td></tr><tr><td>6</td><td>　NA</td><td></td><td>　</td></tr><tr><td>5</td><td>　NA</td><td></td><td>　</td></tr><tr><td>4</td><td>　NA</td><td></td><td>　</td></tr><tr><td>3</td><td>　NA</td><td></td><td>　</td></tr><tr><td>2</td><td>    NA</td><td></td><td>　</td></tr><tr><td>1</td><td>Magnetic field interference</td><td>D02</td><td>Strong magnetic field detected near the device, interfering with AxleSense sensing. </td></tr><tr><td>0</td><td>Paddle wheel abnormality</td><td>D01</td><td>Paddle rotation cannot be detected. Verify the paddlewheel is rotating freely, the pipe is filled with liquid, and the paddlewheel assembly is undamaged. </td></tr></tbody></table>

### **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.

<table data-header-hidden><thead><tr><th width="107"></th><th></th><th width="123.4000244140625"></th><th></th></tr></thead><tbody><tr><td>Alarm bit</td><td>Error Content</td><td> Alarm Code</td><td>Alarm trigger</td></tr><tr><td>7</td><td>    NA</td><td></td><td>　</td></tr><tr><td>6</td><td>Totalised Flow Exceeds Target </td><td>D08</td><td>Totalized flow exceeds or falls below the preset target<mark style="color:red;">*</mark></td></tr><tr><td>5</td><td>Value exceeds analog output upper limit</td><td>D11</td><td>The output value exceeds the analog output upper limit</td></tr><tr><td>4</td><td>Value exceeds analog output lower limit</td><td>D11</td><td>The output value falls below the analog output lower limit</td></tr><tr><td>3</td><td>　NA</td><td></td><td>　</td></tr><tr><td>2</td><td>Pulse Overlap</td><td>D13</td><td>Paddlewheel pulse frequency is too high; consecutive pulse signals overlap. </td></tr><tr><td>1</td><td>Instantaneous flow above upper limit</td><td>D04</td><td>Instantaneous flowrate exceeds the upper limit</td></tr><tr><td>0</td><td>Instantaneous flow below lower limit</td><td>D04</td><td>Instantaneous flowrate falls below the lower limit</td></tr></tbody></table>

<mark style="color:red;">\*</mark> Configure via **D08 Total Ala**, **D09 Total Trig**, and **D10 Total Target**.

{% hint style="info" %}
**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.
{% endhint %}

### **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**.

<table data-header-hidden><thead><tr><th width="118.20001220703125"></th><th width="171.4000244140625"></th><th width="154.59991455078125"></th><th width="170.199951171875"></th></tr></thead><tbody><tr><td>Alarm bit</td><td>Error Content</td><td>Alarm Code</td><td>Alarm trigger</td></tr><tr><td>7</td><td>　NA</td><td></td><td>　</td></tr><tr><td>6</td><td>　NA</td><td></td><td>　</td></tr><tr><td>5</td><td>　NA</td><td></td><td>　</td></tr><tr><td>4</td><td>　NA</td><td></td><td>　</td></tr><tr><td>3</td><td>　NA</td><td></td><td>　</td></tr><tr><td>2</td><td>    NA</td><td></td><td>　</td></tr><tr><td>1</td><td>Iout(0/4-20mA) impedance is too large or there is no connection</td><td>D14</td><td>Analog output (4–20 mA) line resistance is too high, or the wiring is disconnected. Check all analog output wiring connections. </td></tr><tr><td>0</td><td>　NA</td><td></td><td>　</td></tr></tbody></table>

{% hint style="info" %}
**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.
{% endhint %}

### **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**.

<table data-header-hidden><thead><tr><th width="119"></th><th width="177"></th><th width="146.79998779296875"></th><th width="154.79998779296875"></th></tr></thead><tbody><tr><td>Alarm bit</td><td>Error Content</td><td>Alarm Code</td><td>Alarm trigger</td></tr><tr><td>7</td><td>　NA</td><td></td><td>　</td></tr><tr><td>6</td><td>　NA</td><td></td><td>　</td></tr><tr><td>5</td><td>　NA</td><td></td><td>　</td></tr><tr><td>4</td><td>　NA</td><td></td><td>　</td></tr><tr><td>3</td><td>　NA</td><td></td><td>　</td></tr><tr><td>2</td><td>　NA</td><td></td><td>　</td></tr><tr><td>1</td><td>    NA</td><td></td><td>　</td></tr><tr><td>0</td><td>The host is not on the monitoring screen</td><td>NA</td><td>　</td></tr></tbody></table>

### **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.

<table data-header-hidden><thead><tr><th width="96.6875"></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>Alarm bit</td><td>Error Content</td><td>Alarm Code</td><td>Alarm trigger </td></tr><tr><td>7</td><td>　NA</td><td></td><td>　</td></tr><tr><td>6</td><td>　NA</td><td></td><td>　</td></tr><tr><td>5</td><td>　NA</td><td></td><td>　</td></tr><tr><td>4</td><td>　NA</td><td></td><td>　</td></tr><tr><td>3</td><td>　NA</td><td></td><td>　</td></tr><tr><td>2</td><td>　NA</td><td></td><td>　</td></tr><tr><td>1</td><td>    NA</td><td></td><td>　</td></tr><tr><td>0</td><td>　NPN On State</td><td></td><td><p>NPN status: </p><ul><li>NC - Normally Closed (allows current flow) shows “1”</li><li>NO - Normally Open (no current flow) shows “0”</li></ul><p><br>Not including Paddle Pulse status</p></td></tr></tbody></table>