FieldTalk Modbus Slave Library for .NET

MbusAsciiSlaveProtocol Class

This class realises the server side of the Modbus ASCII slave protocol.

Inheritance Hierarchy

SystemObject
  FieldTalk.Modbus.SlaveMbusSlaveServer
    FieldTalk.Modbus.SlaveMbusSerialServerBase
      FieldTalk.Modbus.SlaveMbusAsciiSlaveProtocol

Namespace: FieldTalk.Modbus.Slave
Assembly: FieldTalk.Modbus.Slave (in FieldTalk.Modbus.Slave.dll) Version: 2.11.0-eval+eb1ecbe71c969eff5d7c05d58da16dade0474678

Syntax

C++

Copy

public class MbusAsciiSlaveProtocol : MbusSerialServerBase

Public Class MbusAsciiSlaveProtocol
	Inherits MbusSerialServerBase

public ref class MbusAsciiSlaveProtocol : public MbusSerialServerBase

The MbusAsciiSlaveProtocol type exposes the following members.

Constructors

	Name	Description
	MbusAsciiSlaveProtocol	Instantiates a Modbus ASCII protocol server object.

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Properties

	Name	Description
	baudRate	Baud rate property in bps (Inherited from MbusSerialServerBase.)
	dataBits	Data bits property (Inherited from MbusSerialServerBase.)
	parity	Parity property (Inherited from MbusSerialServerBase.)
	portName	Serial port identifier property (Inherited from MbusSerialServerBase.)
	stopBits	Stop bits property (Inherited from MbusSerialServerBase.)
	timeout	Time-out port property (Inherited from MbusSlaveServer.)

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Methods

	Name	Description
	addDataTable	Associates a protocol object with a Data Provider and a Modbus slave ID. (Inherited from MbusSlaveServer.)
	Dispose	Implement IDisposable. (Inherited from MbusSlaveServer.)
	enableRs485Mode	Enables RS485 mode. (Inherited from MbusSerialServerBase.)
	Finalize	Destructor. (Inherited from MbusSlaveServer.)
	getConnectionStatus	Checks if a Modbus master is polling periodically. (Inherited from MbusSlaveServer.)
	getSuccessCounter	Returns how often a message transfer was successful. (Inherited from MbusSlaveServer.)
	getTimeout	Returns the currently set master time-out supervision value. (Inherited from MbusSlaveServer.)
	getTotalCounter	Returns how often a message transfer has been executed. (Inherited from MbusSlaveServer.)
	isStarted	Returns whether server has been started up. (Inherited from MbusSlaveServer.)
	resetSuccessCounter	Resets successful message transfer counter. (Inherited from MbusSlaveServer.)
	resetTotalCounter	Resets total message transfer counter. (Inherited from MbusSlaveServer.)
	serverLoop	Modbus slave server loop (Inherited from MbusSlaveServer.)
	setTimeout	Configures master transmit time-out supervision. (Inherited from MbusSlaveServer.)
	shutdownServer	Shuts down the Modbus Server. (Inherited from MbusSlaveServer.)
	startupServer	Opens a serial Modbus protocol and the associated serial port with the port parameters configured via properties (Inherited from MbusSerialServerBase.)
	startupServer(String, Int32, Int32, Int32, Int32)	Opens a serial Modbus protocol and the associated serial port with the port parameters configured via properties (Inherited from MbusSerialServerBase.)

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Remarks

This class provides functions to start-up and to execute the Modbus ASCII server engine which includes opening and closing of the serial port. Upon receipt of a valid master query the server engine calls Data Provider methods to exchange data with the user application.

For a more detailed description which Modbus data and control functions have been implemented in the server engine see section Server Functions common to all Protocol Flavours.

It is possible to instantiate multiple instances for establishing multiple connections on different serial ports, however they must be executed in separate threads.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Reference

FieldTalk.Modbus.Slave Namespace

FieldTalk.Modbus.SlaveMbusDataTableInterface

Other Resources

Server Functions common to all Protocol Flavours

Serial Protocols

FieldTalk Modbus Slave Library for .NET
Library version 2.11.0