modbus

package module

v0.1.4 Latest Latest Go to latest Published: Oct 12, 2025 License: MIT Imports: 6 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
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Repository

github.com/wgbbiao/modbus

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Documentation ¶

Index ¶

Constants
type Client
- func NewClient(c *serial.Config) (*Client, error)
type ProtocolDataUnit

Constants ¶

View Source

const (
	FuncCodeReadCoils              = 1
	FuncCodeReadDiscreteInputs     = 2
	FuncCodeReadHoldingRegisters   = 3
	FuncCodeReadInputRegisters     = 4
	FuncCodeWriteSingleCoil        = 5
	FuncCodeWriteSingleRegister    = 6
	FuncCodeWriteMultipleCoils     = 15
	FuncCodeWriteMultipleRegisters = 16
)

View Source

const (
	AddressBroadCast = 0
	AddressMin       = 1
	AddressMax       = 247

	// Bits
	WriteRegQuantityMin = 1   // 1
	WriteRegQuantityMax = 123 // 0x007b
)

proto address limit.

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type Client ¶

type Client struct {

	//发送前延迟 默认 100ms
	DelayRtsBeforeSend time.Duration

	BaudRate int

	// 默认延时倍数
	DefaultDelayReadTimes int64
	// 读操作每一个地址的延时倍数
	DelayReadTimes map[uint]int64
	// contains filtered or unexported fields
}

func NewClient ¶

func NewClient(c *serial.Config) (*Client, error)

func (*Client) Close ¶

func (c *Client) Close()

func (*Client) EnableLog ¶

func (c *Client) EnableLog()

开启log

func (*Client) GetDelayTimes ¶ added in v0.0.9

func (c *Client) GetDelayTimes(address uint) int64

func (*Client) Printf ¶ added in v0.0.6

func (c *Client) Printf(format string, v ...interface{})

日志打印

func (*Client) ReadCoils ¶

func (c *Client) ReadCoils(slaveID byte, address, quantity uint16) (results []byte, err error)

ReadCoils读取远程设备中线圈的1到2000个连续状态，并返回线圈状态。

func (*Client) ReadDiscreteInputs ¶

func (c *Client) ReadDiscreteInputs(slaveID byte, address, quantity uint16) (results []byte, err error)

ReadDiscreteInputs 读取从1到2000连续状态的远程设备中的离散输入，并返回输入状态.

func (*Client) ReadHoldingRegisters ¶

func (c *Client) ReadHoldingRegisters(slaveID byte, address, quantity uint16) (results []uint16, err error)

ReadHoldingRegisters 读取远程设备中连续的保持寄存器块的内容，并返回寄存器值。

func (*Client) ReadInputRegisters ¶ added in v0.1.2

func (c *Client) ReadInputRegisters(slaveID byte, address, quantity uint16) (results []uint16, err error)

Request:

Function code         : 1 byte (0x04)
Starting address      : 2 bytes
Quantity of registers : 2 bytes

Response:

Function code         : 1 byte (0x04)
Byte count            : 1 byte
Input registers       : N bytes

func (*Client) Reconnect ¶

func (c *Client) Reconnect() error

重新连接

func (*Client) Send ¶

func (c *Client) Send(data []byte) ([]byte, error)

发送

func (*Client) WriteMultipleRegistersBytes ¶ added in v0.0.7

func (c *Client) WriteMultipleRegistersBytes(slaveID byte, address, quantity uint16, value []byte) error

Request:

Slave Id              : 1 byte
Function code         : 1 byte (0x10)
Starting address      : 2 bytes
Quantity of outputs   : 2 bytes
Byte count            : 1 byte
Registers value       : N* bytes

Response:

Function code         : 1 byte (0x10)
Starting address      : 2 bytes
Quantity of registers : 2 bytes

func (*Client) WriteSingleCoil ¶

func (c *Client) WriteSingleCoil(slaveID byte, address uint16, isOn bool) error

WriteSingleCoil 在远程设备中将单个输出写入ON或OFF，并返回成功或失败。

func (*Client) WriteSingleRegister ¶

func (c *Client) WriteSingleRegister(slaveID byte, address, value uint16) error

WriteSingleRegister 在远程设备中写入单个保留寄存器，并返回成功或失败。

type ProtocolDataUnit ¶ added in v0.0.7

type ProtocolDataUnit struct {
	FuncCode byte
	Data     []byte
}

ProtocolDataUnit (PDU) is independent of underlying communication layers.

Source Files ¶

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