求 基于java的ModbusTCP协议 源代码

public static void TestModbus() throws Exception{

IpParameters params = new IpParameters()

params.setHost("localhost")//地址

params.setPort(502)//端口

ModbusFactory factory = new ModbusFactory()

ModbusMaster master = factory.createTcpMaster(params, true)

// 初始化

try {

master.init()

readHoldingRegistersTest(master,1,0,3)

} catch (ModbusInitException e) {

e.printStackTrace()

} finally {

master.destroy()

}

}

public static void main(String[] args) {

try {

TestModbus()

} catch (Exception e) {

// TODO: handle exception

e.printStackTrace()

}

}

private static void readHoldingRegistersTest(ModbusMaster master,

int slaveId, int start, int len) {

try {

//ReadInputRegistersRequest request = new ReadInputRegistersRequest(

//slaveId, start, len)

//ReadInputRegistersResponse response = (ReadInputRegistersResponse) master

//.send(request)

ReadHoldingRegistersRequest request = new ReadHoldingRegistersRequest(

slaveId, start, len)

ReadHoldingRegistersResponse response = (ReadHoldingRegistersResponse) master

.send(request)

if (response.isException()) {

System.out.println("Exception response: message="

+ response.getExceptionMessage())

} else {

ByteQueue byteQueue= new ByteQueue(12)

response.write(byteQueue)

System.out.println(byteQueue)

System.out.println(Arrays.toString(response.getShortData()))

short[] list = response.getShortData()

for(int i = 0i <list.lengthi++){

System.out.print(list[i] + " ")

}

}

} catch (ModbusTransportException e) {

e.printStackTrace()

}

}

其实任何数制都是一回事，大多协议相关资料在解释协议的时候，多采用十六进制表达MODBUS协议码，但这只是一种习惯而已，十进制表达也没有错的，只是大家不这样表达而已。无论什么协议数据，在进行信道上进行传输时都是以二进制码串的方式进行的。

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