# Read/Write Memory – Read List

{% hint style="info" %}
When reading large values with different data formats (e.g., **Float32** or **Int64**), tiny differences may occur due to internal calculations, typically **less than 1/10,000**, which is normal.

**Read commands** must not exceed **20 registers**; longer requests will be **ignored**. See the register list for details.
{% endhint %}

### How to Use the Read/Write Memory List

<table data-header-hidden><thead><tr><th width="186">Field Name</th><th>Function</th></tr></thead><tbody><tr><td>Field Name</td><td>Function</td></tr><tr><td>Register Address</td><td>Addresses for read/write memory, not shared with read-only memory.</td></tr><tr><td>Register Length</td><td>Length of the register variable.</td></tr><tr><td>Memory Content Name</td><td>Describes the name or purpose of the memory content.</td></tr><tr><td>Data Type</td><td>Specifies the format of transmitted or received data.</td></tr><tr><td>Read Command</td><td>Indicates the available read commands.</td></tr><tr><td>Write Command</td><td>Indicates the available write commands. A value of X in this column means remote writing is not supported for that register.</td></tr><tr><td>Category Option List Link</td><td>Links to detailed items in each category.</td></tr></tbody></table>

***

## Memory List

<table><thead><tr><th width="130.9912109375">Reg Address</th><th width="82.830078125">Reg  Length</th><th width="216.91796875">Memory Content Name</th><th width="80.2568359375">Data Type</th><th width="103.6904296875">Read Command</th><th width="115.109375">Write Command</th><th data-hidden></th></tr></thead><tbody><tr><td><p>Reg</p><p>Address</p></td><td>Reg  Length</td><td>Memory Content Name</td><td>Data Type</td><td>Read Command</td><td>Write Command</td><td></td></tr><tr><td><a href="../../../parameters/a-measurement-setup"><strong>A Parameters</strong></a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>00 00</td><td>1</td><td>A02 Preset Pipe Spec</td><td>int16</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 01</td><td>1</td><td>A03 Pipe Geo Unit</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>00 02</td><td>2</td><td>A04 Pipe Outer Diameter</td><td>float32</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 04</td><td>2</td><td>A05 Pipe Perimeter</td><td>float32</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 06</td><td>2</td><td>A06 Pipe Thickness</td><td>float32</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 08</td><td>2</td><td>A07 Pipe Inner Diameter</td><td>float32</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 0A</td><td>1</td><td>A08 Pipe Material</td><td>int16</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 0B</td><td>2</td><td>A09 Pipe Soundspeed</td><td>float32</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 0D</td><td>1</td><td>A10 Liquid Type</td><td>int16</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 0E</td><td>2</td><td>A12 Liquid Soundspeed</td><td>float32</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 10</td><td>2</td><td>A13 K Viscosity cst</td><td>float32</td><td>03</td><td>Ｘ</td><td></td></tr><tr><td>00 12</td><td>1</td><td>A15 Damping</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>00 13</td><td>1</td><td>A16 Direction</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>00 14</td><td>1</td><td>A17 Neg Flow</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>00 15</td><td>2</td><td>A18 Low Flow Cutoff</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>00 17</td><td>1</td><td>A19 Fast Update</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>00 18</td><td>1</td><td>A20 Anti Noise</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>00 19</td><td>2</td><td>A23 Zero Offset</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>00 1D</td><td>1</td><td>A26 Beta Mode</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td><a href="../../../parameters/b-unit-setup"><strong>B Parameters</strong></a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>01 00</td><td>1</td><td>B01 Vol Unit</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>01 01</td><td>1</td><td>B02 Time Unit</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>01 02</td><td>1</td><td>B03 Total Unit</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>01 03</td><td>1</td><td>B04 VelocityUnit</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>01 04</td><td>1</td><td>B05 Dec Place</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>01 05</td><td>1</td><td>B06 Pipe Geo Unit</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td><a href="../../../parameters/k-calibration"><strong>K Parameters</strong></a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0A 00</td><td>1</td><td>K02 Calibra Mode</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>0A 01</td><td>2</td><td>K03 Scale Factor</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>0A 03</td><td>2</td><td>K04 Manual Offset</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>0A 05</td><td>2</td><td>K05 Totalizer Scale</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td><a href="../../../parameters/c-total"><strong>C Parameters</strong></a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>02 00</td><td>1</td><td>C01 Total Method</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>02 01</td><td>1</td><td>C02 Del Total</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>02 02</td><td>1</td><td>C03 Dosing Mode</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>02 03</td><td>2</td><td>C04 Dosing Target</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>02 05</td><td>1</td><td>C05 Dosing Reset Time</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>02 83</td><td>4</td><td>C04 Dosing Target(64)</td><td>int64</td><td>03</td><td>31</td><td></td></tr><tr><td><a href="../../../parameters/d-alarm-and-info"><strong>D Parameters</strong></a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>03 00</td><td>1</td><td>D01 BoardComm Ala</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 01</td><td>1</td><td>D02 Pipe Sensor Alarm</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 02</td><td>1</td><td>D03 Bad UltraS Signal</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 03</td><td>1</td><td>D04 Off Pipe Alarm</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 04</td><td>1</td><td>D05 FlowLIM Ala</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 05</td><td>2</td><td>D06 Up LIM</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>03 07</td><td>2</td><td>D07 Low LIM</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>03 09</td><td>1</td><td>D08 Hysteresis%</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 0A</td><td>1</td><td>D09 Total Ala</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 0B</td><td>1</td><td>D10 Total Trig</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 0C</td><td>2</td><td>D11 Total Target</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>03 0E</td><td>1</td><td>D12 Iout Alarm</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 0F</td><td>1</td><td>D13 Speed Alarm</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 10</td><td>1</td><td>D14 PulseOverlap</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 11</td><td>1</td><td>D15 IoutStatAla</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 12</td><td>1</td><td>D16 Dosing Alarm</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>03 8C</td><td>4</td><td>D11 Total Target(64)</td><td>int64</td><td>03</td><td>31</td><td></td></tr><tr><td><a href="../../../parameters/e-commute"><strong>E Parameters</strong></a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>04 00</td><td>1</td><td>E01 NC/NO</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>04 01</td><td>1</td><td>E02 OCT Info</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>04 02</td><td>1</td><td>E03 Pulse Width</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>04 03</td><td>1</td><td>E06 Iout Def</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>04 04</td><td>2</td><td>E07 4mA Value</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>04 06</td><td>2</td><td>E08 20mA Value</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>04 08</td><td>1</td><td>E09 Iout Error</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>04 09</td><td>2</td><td>E11 4mA Adj uA</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>04 0B</td><td>2</td><td>E12 20mA Adj uA</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>04 0D</td><td>1</td><td>E13 Iout Range</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>04 0E</td><td>1</td><td>E14 PulseV2 Unit</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>04 0F</td><td>1</td><td>E17 Endianness</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td><a href="../../../parameters/f-simulate"><strong>F Parameters</strong></a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>05 00</td><td>2</td><td>F01 Sim Volume</td><td>float32</td><td>03</td><td>30</td><td></td></tr><tr><td>05 02</td><td>1</td><td>F02 Sim Mode</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td><a href="../../../parameters/h-system"><strong>H Parameters</strong></a></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>07 01</td><td>1</td><td>H02 LCD Bri</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>07 02</td><td>1</td><td>H03 Green Light</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>07 03</td><td>1</td><td>H04 Language</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>07 04</td><td>1</td><td>H06 Reset</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>07 05</td><td>1</td><td>H07 Lock Device</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>07 06</td><td>1</td><td>H08 Password</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>07 07</td><td>1</td><td>H09 Home Page</td><td>int16</td><td>03</td><td>06</td><td></td></tr><tr><td>07 08</td><td>1</td><td>H10 Debug Page</td><td>int16</td><td>03</td><td>06</td><td></td></tr></tbody></table>