使用modbus4j通过串口解析modbus协议(java)
java使用modbus4j示例如下,特别注意:
如果想轮询去读数据,需要for循环调readHoldingRegistersTest(master,SLAVE_ADDRESS,0,100); 并且serialParameters.setStopBits(1); 修改为serialParameters.setStopBits(2);
如果想轮询去读数据,需要for循环调readHoldingRegistersTest(master,SLAVE_ADDRESS,0,100); 并且serialParameters.setStopBits(1); 修改为serialParameters.setStopBits(2);
import java.util.Arrays; import com.serotonin.io.serial.SerialParameters; import com.serotonin.modbus4j.ModbusFactory; import com.serotonin.modbus4j.ModbusMaster; import com.serotonin.modbus4j.exception.ModbusInitException; import com.serotonin.modbus4j.exception.ModbusTransportException; import com.serotonin.modbus4j.msg.ReadDiscreteInputsRequest; import com.serotonin.modbus4j.msg.ReadDiscreteInputsResponse; import com.serotonin.modbus4j.msg.ReadHoldingRegistersRequest; import com.serotonin.modbus4j.msg.ReadHoldingRegistersResponse; import com.serotonin.modbus4j.msg.WriteRegistersRequest; import com.serotonin.modbus4j.msg.WriteRegistersResponse; /** * 通过串口解析MODBUS协议 */ public class TestModbusDemo { /* * 设定MODBUS网络上从站地址 SLAVE_ADDRESS = 1; * 串行波特率 BAUD_RATE = 9600; */ private final static int SLAVE_ADDRESS = 1; private final static int BAUD_RATE = 9600; public static void main(String[] args) { SerialParameters serialParameters = new SerialParameters(); /* 设定MODBUS通讯的串行口 */ serialParameters.setCommPortId("COM3"); /* 设定成无奇偶校验 */ serialParameters.setParity(0); /* 设定成数据位是8位 */ serialParameters.setDataBits(8); /* 设定为1个停止位 */ serialParameters.setStopBits(1); /* 设定端口名称 */ serialParameters.setPortOwnerName("COM3"); /* 设定端口波特率 */ serialParameters.setBaudRate(BAUD_RATE); /* 创建ModbusFactory工厂实例 */ ModbusFactory modbusFactory = new ModbusFactory(); /* 创建ModbusMaster实例 */ ModbusMaster master = modbusFactory.createRtuMaster(serialParameters); /* 初始化 */ try { master.init(); readHoldingRegistersTest(master, SLAVE_ADDRESS, 0, 100); } catch (ModbusInitException e) { e.printStackTrace(); } finally { master.destroy(); } } /** * 读开关量型的输入信号 * * @param master 主站 * @param slaveId 从站地址 * @param start 起始偏移量 * @param len 待读的开关量的个数 */ private static void readDiscreteInputTest(ModbusMaster master, int slaveId, int start, int len) { try { ReadDiscreteInputsRequest request = new ReadDiscreteInputsRequest(slaveId, start, len); ReadDiscreteInputsResponse response = (ReadDiscreteInputsResponse) master.send(request); if (response.isException()) { System.out.println("异常消息:" + response.getExceptionMessage()); } else { System.out.println(Arrays.toString(response.getBooleanData())); } } catch (ModbusTransportException e) { e.printStackTrace(); } } /** * 读保持寄存器上的内容 * * @param master 主站 * @param slaveId 从站地址 * @param start 起始地址的偏移量 * @param len 待读寄存器的个数 */ private static void readHoldingRegistersTest(ModbusMaster master, int slaveId, int start, int len) { try { ReadHoldingRegistersRequest request = new ReadHoldingRegistersRequest(slaveId, start, len); ReadHoldingRegistersResponse response = (ReadHoldingRegistersResponse) master.send(request); if (response.isException()) { System.out.println("异常消息:" + response.getExceptionMessage()); } else { System.out.println(Arrays.toString(response.getShortData())); short[] list = response.getShortData(); for (int i = 0; i < list.length; i++) { System.out.print(list[i] + " "); } } } catch (ModbusTransportException e) { e.printStackTrace(); } } /** * 批量写数据到保持寄存器 * * @param master 主站 * @param slaveId 从站地址 * @param start 起始地址的偏移量 * @param values 待写数据 */ public static void writeRegistersTest(ModbusMaster master, int slaveId, int start, short[] values) { try { WriteRegistersRequest request = new WriteRegistersRequest(slaveId, start, values); WriteRegistersResponse response = (WriteRegistersResponse) master.send(request); if (response.isException()) { System.out.println("异常消息:" + response.getExceptionMessage()); } else { System.out.println("写入成功"); } } catch (ModbusTransportException e) { e.printStackTrace(); } } }
modbus4J.jar 下载
链接:https://pan.baidu.com/s/19ogm2_hA2zUgX-afQVgJZg
提取码:ea9s
seroUtils.jar 下载
链接:https://pan.baidu.com/s/1sbjR9w4JWe5ctBcLZwb8UA
提取码:c9sv
Java串口通信依赖的jar包RXTXcomm.jar 32位与64位版本 下载
链接:https://pan.baidu.com/s/1ZH1nv9Xm90TLqEuta-g8BA
提取码:fwcd