> 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-as510-paddle-wheel-flowmeter-manual-en-v2/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-list.md). # Read/Write Memory – Read List {% hint style="info" %} When reading large values with different data formats (e.g., **Float32**), 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 | Field Name | Function | | ------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------- | | Register Address | Addresses for read/write memory, not shared with read-only memory. | | Register Length | Length of the register variable. | | Memory Content Name | Describes the name or purpose of the memory content. Linked names go to that parameter's own page for full option values, ranges, and setup steps. | | Data Type | Specifies the format of transmitted or received data. | | Read Command | Indicates the available read commands. | | Write Command | Indicates the available write commands. A value of X in this column means remote writing is not supported for that register. | ## Read-Write Memory List
Register AddressDecimalMaster AddressReg LengthMemory Content NameData TypeRead CommandWrite Command
A Parameter Category
0x00000400011A01 Pipe Typeunsigned int 160306
0x00011400022A02 Scale Factorfloat 320330
0x00033400041A03 Anti-Noiseunsigned int 160306
0x00044400051A04 Dampingunsigned int 160306
0x00055400061A05 Directionunsigned int 160306
0x00066400071A06 Neg Flowunsigned int 160306
0x00077400081A07 Ext. Mode (Extension Mode)unsigned int 160306
0x00088400091A08 Fast Updateunsigned int 160306
B Parameter Category
0x0100256402571B01 Vol. Unitunsigned int 160306
0x0101257402581B02 Time Unitunsigned int 160306
0x0102258402591B03 Total Unitunsigned int 160306
0x0103259402601B04 Velocity Unitunsigned int 160306
0x0104260402611B05 Dec. Placeunsigned int 160306
C Parameter Category
0x0200512405131C01 Total Methodunsigned int 160306
0x0201513405141C02 Del. Totalunsigned int 16X06
0x0202514405151C03 History Functionunsigned int 160306
0x0203515405161C04 Del. Historyunsigned int 16X06
D Parameter Category
0x0300768407691D01 Paddle Alarmunsigned int 160306
0x0301769407701D02 Mag. Alarmunsigned int 160306
0x0302770407711D03 Bat. Alarmunsigned int 160306
0x0303771407721D04 FlowLIM Alarmunsigned int 160306
0x0304772407732D05 Up LIMfloat 320330
0x0306774407752D06 Low LIMfloat 320330
0x0308776407771D07 Hysteresis%unsigned int 160306
0x0309777407781D08 Total Alarmunsigned int 160306
0x030A778407791D09 Total Trig.unsigned int 160306
0x030B779407802D10 Total Targetfloat 320330
0x030D781407821D11 Iout Alarmunsigned int 160306
0x030E782407831D12 Speed Alarmunsigned int 160306
0x030F783407841D13 PulseOverlapunsigned int 160306
E Parameter Category
0x04001024410251E01 NC/NOunsigned int 160306
0x04011025410261E02 OCT Infounsigned int 160306
0x04021026410271E03 Pulse Widthunsigned int 160306
0x04031027410281E04 Modbus IDunsigned int 160306
0x04041028410291E05 Baudunsigned int 160306
0x04051029410301E06 Iout Def.unsigned int 160306
0x04061030410312E07 4mA Valuefloat 320330
0x04081032410332E08 20mA Valuefloat 320330
0x040A1034410351E09 Iout Errorunsigned int 160306
0x040B1035410362E11 4mA Adj. uAfloat 320330
0x040D1037410382E12 20mA Adj. uAfloat 320330
0x040F1039410401E13 Iout Rangeunsigned int 160306
0x04101040410411E14 PulseV2 Unitunsigned int 160306
F Parameter Category
0x05001280412812F01 Sim. Volumefloat 320330
0x05021282412831sim on – reservedconst03X
0x05031283412841sim pulse – reservedconst03X
G Parameter Category
0x06001536415371G01 Set Yearunsigned int 160306
0x06011537415381G02 Set Monthunsigned int 160306
0x06021538415391G03 Set Dayunsigned int 160306
0x06031539415401G04 Set Timeunsigned int 160306
0x06041540415411G05 Date Formatunsigned int 160306
H Parameter Category
0x07001792417931H01 LED Bri.unsigned int 160306
0x07011793417941H02 LCD Bri.unsigned int 160306
0x07021794417951H03 Green Lightunsigned int 160306
0x07031795417961H04 Languageunsigned int 160306
0x07041796417971H05 Paddle Init.unsigned int 16X06
0x07051797417981H06 Resetunsigned int 16X06
0x07061798417991H07 Lock Deviceunsigned int 160306
0x07071799418001H08 Passwordunsigned int 160306
### **Example: C02 Del. Total (clear/reset totalized flow)** | Step | Value | | ------------------------------------------ | ------------------------ | | Table Register Address (Hex) | 0x0201 | | Converted to decimal | 0x0201 = 2×256 + 1 = 513 | | Master address to enter (4xxxx convention) | 40001 + 513 = 40514 | | Address bytes in the frame | 02 01 | | Full write frame (station 01) | 01 06 02 01 00 01 18 72 | If `40201` is entered by mistake, the master sends decimal `200` (`0x00C8`) — an address that doesn't exist. The flow meter won't respond, or may return exception code 02; on the PLC side this appears as "no response to write." ### Self-verification tip If you're not sure which address convention your master uses, first use function code 03 to read the register that corresponds to Modbus ID. If the value read back matches the device's own station number, the address base is correct and you can safely apply the same convention to the other addresses. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.lorric.com/qr/fp-as510-paddle-wheel-flowmeter-manual-en-v2/communication/modbus-rtu-protocol/read-write-memory-ram/read-write-memory-list.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.