Enum MbusError 

pub enum MbusError {
    ParseError,
    BasicParseError,
    Timeout,
    ModbusException(u8),
    IoError,
    Unexpected,
    ConnectionLost,
    UnsupportedFunction(u8),
    ReservedSubFunction(u16),
    InvalidPduLength,
    InvalidAduLength,
    ConnectionFailed,
    ConnectionClosed,
    BufferTooSmall,
    BufferLenMissmatch,
    SendFailed,
    InvalidAddress,
    InvalidOffset,
    TooManyRequests,
    InvalidFunctionCode,
    NoRetriesLeft,
    TooManyFileReadSubRequests,
    FileReadPduOverflow,
    UnexpectedResponse,
    InvalidTransport,
    InvalidSlaveAddress,
    ChecksumError,
    InvalidConfiguration,
    InvalidNumOfExpectedRsps,
    InvalidDataLen,
    InvalidQuantity,
    InvalidValue,
    InvalidAndMask,
    InvalidOrMask,
    InvalidByteCount,
    InvalidDeviceIdentification,
    InvalidDeviceIdCode,
    InvalidMeiType,
    InvalidBroadcastAddress,
    BroadcastNotAllowed,
}

Represents a Modbus error.

Variants

ParseError

An error occurred while parsing the Modbus ADU.

BasicParseError

This is used for receieved frame is fundamentally malformed

Timeout

The transaction timed out waiting for a response.

ModbusException(u8)

The server responded with a Modbus exception code.

IoError

An I/O error occurred during TCP communication.

Unexpected

An unexpected error occurred.

ConnectionLost

The connection was lost during an active transaction.

UnsupportedFunction(u8)

The function code is not supported

ReservedSubFunction(u16)

The sub-function code is not available

InvalidPduLength

The PDU length is invalid

InvalidAduLength

The ADU length is invalid

ConnectionFailed

Connection failed

ConnectionClosed

Connection closed

BufferTooSmall

The data was too large for the buffer

BufferLenMissmatch

Buffer length is not matching

SendFailed

Failed to send data

InvalidAddress

Invalid address

InvalidOffset

Invalid offset

TooManyRequests

Too many requests in flight, expected responses buffer is full

InvalidFunctionCode

Invalid function code

NoRetriesLeft

No retries left for the transaction

TooManyFileReadSubRequests

Too many sub-requests in a PDU, Max allowed is 35

FileReadPduOverflow

File read PDU overflow, total length of file read sub-requests exceeds maximum allowed bytes per PDU

UnexpectedResponse

An unexpected response was received that does not match the expected response type for the transaction.

InvalidTransport

The transport is invalid for the requested operation

InvalidSlaveAddress

Invalid slave address

ChecksumError

Checksum error

InvalidConfiguration

Invalid configuration

InvalidNumOfExpectedRsps

Invalid number of expected responses.

For Modbus Serial transports, only one request may be in flight at a time, so the expected-response queue size must be exactly 1.

InvalidDataLen

Invalid data length

InvalidQuantity

Invalid Quantity

InvalidValue

Invalid Value

InvalidAndMask

Invalid Masking value

InvalidOrMask

Invalid Masking value

InvalidByteCount

Invalid byte count

InvalidDeviceIdentification

Invalid device identification

InvalidDeviceIdCode

Invalid device id code

InvalidMeiType

Invalid MEI type

InvalidBroadcastAddress

Invalid broadcast address (0): Broadcast must be created explicitly. Use UnitIdOrSlaveAddr::new_broadcast_address() to signal broadcast intent.

BroadcastNotAllowed

Broadcast not allowed.

Note: This variant name contains a historical typo and is kept for compatibility with existing code.

Implementations

impl MbusError

pub const fn broadcast_not_allowed() -> Self

Returns the canonical “broadcast not allowed” error.

This helper exists to provide a correctly spelled API path while preserving the legacy enum variant name for compatibility.

Trait Implementations

impl Clone for MbusError

fn clone(&self) -> MbusError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MbusError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for MbusError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for MbusError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<TransportError> for MbusError

fn from(err: TransportError) -> Self

Converts to this type from the input type.

impl PartialEq for MbusError

fn eq(&self, other: &MbusError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for MbusError

impl Eq for MbusError

impl StructuralPartialEq for MbusError