Enum rodbus::ExceptionCode

pub enum ExceptionCode {
    IllegalFunction,
    IllegalDataAddress,
    IllegalDataValue,
    ServerDeviceFailure,
    Acknowledge,
    ServerDeviceBusy,
    MemoryParityError,
    GatewayPathUnavailable,
    GatewayTargetDeviceFailedToRespond,
    Unknown(u8),
}

Exception codes defined in the Modbus specification

Variants

IllegalFunction

The function code received in the query is not an allowable action for the server

IllegalDataAddress

The data address received in the query is not an allowable address for the server

IllegalDataValue

A value contained in the request is not an allowable value for server

ServerDeviceFailure

An unrecoverable error occurred while the server was attempting to perform the requested action

Acknowledge

Specialized use in conjunction with programming commands

The server has accepted the request and is processing it

ServerDeviceBusy

Specialized use in conjunction with programming commands

The server is engaged in processing a long–duration program command, try again later

MemoryParityError

Specialized use in conjunction with function codes 20 and 21 and reference type 6, to indicate that the extended file area failed to pass a consistency check.

The server attempted to read a record file, but detected a parity error in the memory

GatewayPathUnavailable

Specialized use in conjunction with gateways.

Indicates that the gateway was unable to allocate an internal communication path from the input port to the output port for processing the request. Usually means that the gateway is mis-configured or overloaded

GatewayTargetDeviceFailedToRespond

Specialized use in conjunction with gateways.

Indicates that no response was obtained from the target device. Usually means that the device is not present on the network.

Unknown(u8)

The exception code received is not defined in the standard

Trait Implementations

impl Clone for ExceptionCode

fn clone(&self) -> ExceptionCode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ExceptionCode

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

Formats the value using the given formatter.

impl Display for ExceptionCode

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

Formats the value using the given formatter.

impl Error for ExceptionCode

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

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, demand: &mut Demand<'a>)

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

Provides type based access to context intended for error reports.

impl From<ExceptionCode> for RequestError

fn from(err: ExceptionCode) -> Self

Converts to this type from the input type.

impl From<ExceptionCode> for u8

fn from(ex: ExceptionCode) -> Self

Converts to this type from the input type.

impl From<u8> for ExceptionCode

fn from(value: u8) -> Self

Converts to this type from the input type.

impl Ord for ExceptionCode

fn cmp(&self, other: &ExceptionCode) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<ExceptionCode> for ExceptionCode

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd<ExceptionCode> for ExceptionCode

fn partial_cmp(&self, other: &ExceptionCode) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for ExceptionCode

impl Eq for ExceptionCode

impl StructuralEq for ExceptionCode

impl StructuralPartialEq for ExceptionCode