# RS485

## **SPEC**

Please see the page of [mechanical and electrical installation.](/qr/fp-as510-paddle-wheel-flowmeter-manual-en-v1/install-and-set-up/mechanical-and-electrical-installation.md#mechanical-and-electrical-spec-of-device)

## **Cable** wiring

Please see the page of [mechanical and electrical installation.](/qr/fp-as510-paddle-wheel-flowmeter-manual-en-v1/install-and-set-up/mechanical-and-electrical-installation.md#mechanical-and-electrical-spec-of-device)

## **Parameter setup**

Please refer to [parameter set-up page](/qr/fp-as510-paddle-wheel-flowmeter-manual-en-v1/parameters-table.md).

Set-up steps as below:

1. Connect cable according to the cable wiring section on this page.
2. This machine uses Modbus RTU protocol, communication parameter set-up as below.：
   1. Set E04 for RS485 address, and please make sure there is no other device using the same address.
   2. Set E05 for specifying communication Baud, this machine supports 9600, 19200, 38400 and 57600.
3. Please go back to the monitoring screen. RS485 only responses on monitoring screens.
4. If needed, please use F01 and F02 to set up the machine to do communication test under simulation mode.
5. Please refer to the [Modbus RTU protocol page](/qr/fp-as510-paddle-wheel-flowmeter-manual-en-v1/communication/modbus-rtu-protocol.md) for testing the memory with read and write instruction.
6. Turn off F02 simulation mode.
7. Finish.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.lorric.com/qr/fp-as510-paddle-wheel-flowmeter-manual-en-v1/communication/rs485.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.