ModbusRequest class abstract

The base Modbus request

For each Modbus request, a PDU response function code + 0x80 means the request has an exception. The ModbusResponseCode defines possible modbus Exception.

Exception response PDU

BYTE - Function Code + 0x80 BYTE - Exception Code

Implementers

• ModbusElementRequest
• ModbusFileRecordsReadRequest
• ModbusFileRecordsWriteRequest

Constructors

ModbusRequest({int? unitId, Duration? responseTimeout, ModbusEndianness endianness = ModbusEndianness.ABCD})

Properties

endianness ↔ ModbusEndianness

getter/setter pair

functionCode → FunctionCode

no setter

hashCode → int

The hash code for this object.

no setter, inherited

protocolDataUnit → Uint8List

no setter

responseCode → Future<ModbusResponseCode>

no setter

responsePduLength → int

no setter

responseTimeout → Duration?

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

unitId → int?

final

Methods

internalSetFromPduResponse(Uint8List pdu) → ModbusResponseCode

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

reset() → void

setFromPduResponse(Uint8List pdu) → void

setResponseCode(ModbusResponseCode code) → void

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited