Enum ModbusError 

pub enum ModbusError {
    FrameTooShort,
    FrameTooLong,
    CrcMismatch {
        expected: u16,
        found: u16,
    },
    InvalidValueCount,
    MalformedResponse,
}

What can go wrong building or reading a Modbus RTU frame.

Variants

FrameTooShort

A frame is shorter than the smallest valid RTU ADU (address, function, CRC).

FrameTooLong

A frame or PDU is longer than the 256-byte RTU maximum allows.

CrcMismatch

A received frame’s CRC does not match its contents, so the frame is corrupt.

Fields

expected: u16

The CRC computed over the frame’s contents.

found: u16

The CRC the frame carried.

InvalidValueCount

A write request named a number of values a single request cannot carry (it must be between one and the function’s maximum).

MalformedResponse

A response PDU is truncated or its declared byte count does not match its data.

Trait Implementations

impl Clone for ModbusError

fn clone(&self) -> ModbusError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ModbusError

impl Debug for ModbusError

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

Formats the value using the given formatter.

impl Display for ModbusError

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

Formats the value using the given formatter.

impl Eq for ModbusError

impl Error for ModbusError

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 PartialEq for ModbusError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ModbusError