Enum ExceptionCode 

#[non_exhaustive]
pub enum ExceptionCode {
    IllegalFunction,
    IllegalDataAddress,
    IllegalDataValue,
    ServerDeviceFailure,
    Acknowledge,
    ServerDeviceBusy,
    MemoryParityError,
    GatewayPathUnavailable,
    GatewayTargetFailedToRespond,
    Unknown(u8),
}

Modbus exception codes returned by a device to indicate an error.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

IllegalFunction

0x01 — The function code is not supported.

IllegalDataAddress

0x02 — The data address is not valid.

IllegalDataValue

0x03 — The data value is not valid.

ServerDeviceFailure

0x04 — An unrecoverable error occurred on the server.

Acknowledge

0x05 — The request has been accepted but will take time to process.

ServerDeviceBusy

0x06 — The server is busy processing another request.

MemoryParityError

0x08 — Memory parity error detected.

GatewayPathUnavailable

0x0A — The gateway path is not available.

GatewayTargetFailedToRespond

0x0B — The gateway target device failed to respond.

Unknown(u8)

An exception code not defined in the standard.

Implementations

impl ExceptionCode

pub const fn from_u8(value: u8) -> Self

Parse an exception code from its wire byte value.

impl ExceptionCode

pub const fn as_u8(self) -> u8

Return the wire byte value for this exception code.

Trait Implementations

impl Clone for ExceptionCode

fn clone(&self) -> ExceptionCode

Returns a duplicate 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

Formats the value using the given formatter.

impl PartialEq for ExceptionCode

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

impl Eq for ExceptionCode

impl StructuralPartialEq for ExceptionCode