Enum libmodbus::Exception

pub enum Exception {
    IllegalFunction,
    IllegalDataAddress,
    IllegalDataValue,
    SlaveOrServerFailure,
    Acknowledge,
    SlaveDeviceBusy,
    NegativeAcknowledge,
    MemoryParity,
    NotDefined,
    GatewayPath,
    GatewayTarget,
}

Modbus protocol exceptions

Documentation source: https://en.wikipedia.org/wiki/Modbus#Main_Modbus_exception_codes

Variants

IllegalFunction

(1) Illegal Function - Function code received in the query is not recognized or allowed by slave

IllegalDataAddress

(2) Illegal Data Address - Data address of some or all the required entities are not allowed or do not exist in slave

IllegalDataValue

(3) Illegal Data Value - Value is not accepted by slave

SlaveOrServerFailure

(4) Slave Device Failure - Unrecoverable error occurred while slave was attempting to perform requested action

Acknowledge

(5) Acknowledge - Slave has accepted request and is processing it, but a long duration of time is required. This response is returned to prevent a timeout error from occurring in the master. Master can next issue a Poll Program Complete message to determine whether processing is completed

SlaveDeviceBusy

(6) Slave Device Busy - Slave is engaged in processing a long-duration command. Master should retry later

NegativeAcknowledge

(7) Negative Acknowledge - Slave cannot perform the programming functions. Master should request diagnostic or error information from slave

MemoryParity

(8) Memory Parity Error - Slave detected a parity error in memory. Master can retry the request, but service may be required on the slave device

NotDefined

(9) Not defined

GatewayPath

(10) Gateway Path Unavailable - Specialized for Modbus gateways. Indicates a misconfigured gateway

GatewayTarget

(11) Gateway Target Device Failed to Respond - Specialized for Modbus gateways. Sent when slave fails to respond

Trait Implementations

impl Clone for Exception

fn clone(&self) -> Exception

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Exception

impl Debug for Exception

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

Formats the value using the given formatter.

impl Eq for Exception

impl Hash for Exception

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl PartialEq<Exception> for Exception

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

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

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl StructuralEq for Exception

impl StructuralPartialEq for Exception