> For the complete documentation index, see [llms.txt](https://docs.lorric.com/qr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lorric.com/qr/fp-as310-english-v5/user-interface/alarm-priority-and-display-method.md).

# Alarms and System Status - A

{% 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 %}

<figure><img src="/files/mQDCD59ElmuWOFgUbTxN" alt=""><figcaption></figcaption></figure>

### **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:

<figure><img src="/files/hJwHlW52U8Zn99p5FiM1" alt=""><figcaption></figcaption></figure>

<table><thead><tr><th width="84.08856201171875">Bit</th><th>Alarm Definition</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>Paddlewheel 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>

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

### **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.

<figure><img src="/files/nJ7P5OagtkhITWSJQ2Pi" alt=""><figcaption></figcaption></figure>

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

<table><thead><tr><th width="107">Bit</th><th>Alarm Definition</th><th width="123.4000244140625">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>Totalized flow alarm </td><td>D08</td><td>Totalized flow exceeds or falls below the preset target <mark style="color:red;">*Note</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;">\* Note:</mark>&#x20;

```
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.
```

{% 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 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:

<figure><img src="/files/dnfu5FdpBshxHjFeynDK" alt=""><figcaption></figcaption></figure>

<table><thead><tr><th width="118.20001220703125">Bit</th><th width="171.4000244140625">Alarm Definition</th><th width="154.59991455078125">Alarm Code</th><th width="170.199951171875">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>Analog Output Line Fault</td><td>D14</td><td>Analog output (4-20mA) 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 **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.

<table><thead><tr><th width="119">Bit</th><th width="177">Alarm Definition</th><th width="146.79998779296875">Alarm Code</th><th width="154.79998779296875">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>NA</td><td></td><td>　</td></tr><tr><td>0</td><td>Main Unit Not on Monitoring Screen</td><td>NA</td><td>Main unit is in the settings menu, simulation mode, or another manual operation, and is not displaying the main monitoring screen.</td></tr></tbody></table>

### **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.

<figure><img src="/files/vHf5oQzzfRDLeGDJQSdI" alt=""><figcaption></figcaption></figure>

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

<table><thead><tr><th width="96.6875">Bit</th><th>Alarm Definition</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>NA</td><td></td><td>　</td></tr><tr><td>0</td><td>NPN On State</td><td>E01</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>Note: This does not include Paddle Pulse status.</p></td></tr></tbody></table>


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