java 对接施耐德plc示例

Java可以通过Modbus协议对接施耐德PLC，以下是一个示例代码：

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;

import com.serotonin.modbus4j.BatchRead;
import com.serotonin.modbus4j.BatchResults;
import com.serotonin.modbus4j.Modbus;
import com.serotonin.modbus4j.ModbusFactory;
import com.serotonin.modbus4j.ModbusMaster;
import com.serotonin.modbus4j.code.DataType;
import com.serotonin.modbus4j.exception.ErrorResponseException;
import com.serotonin.modbus4j.exception.ModbusInitException;
import com.serotonin.modbus4j.exception.ModbusTransportException;
import com.serotonin.modbus4j.locator.BaseLocator;

public class SchneiderPLC {

    public static void main(String[] args) throws UnknownHostException, ModbusTransportException, ErrorResponseException, ModbusInitException {
        ModbusFactory modbusFactory = new ModbusFactory();
        InetAddress address = InetAddress.getByName("192.168.0.1");
        ModbusMaster master = modbusFactory.createTcpMaster(Modbus.tcp(address.getHostAddress(), 502));
        master.init();

        // 读取线圈状态
        BaseLocator<Boolean> coilLocator = BaseLocator.coilStatus(1, 0);
        Boolean coilValue = master.getValue(coilLocator);
        System.out.println("线圈状态：" + coilValue);

        // 读取离散输入状态
        BaseLocator<Boolean> discLocator = BaseLocator.inputStatus(1, 0);
        Boolean discValue = master.getValue(discLocator);
        System.out.println("离散输入状态：" + discValue);

        // 读取寄存器
        BaseLocator<Number> regLocator = BaseLocator.holdingRegister(1, 0, DataType.TWO_BYTE_INT_SIGNED);
        Number regValue = master.getValue(regLocator);
        System.out.println("寄存器值：" + regValue);

        // 批量读取
        BatchRead<Integer> batch = new BatchRead<>();
        batch.addLocator(1, BaseLocator.holdingRegister(0, 0, DataType.TWO_BYTE_INT_SIGNED));
        batch.addLocator(1, BaseLocator.inputStatus(0, 0));
        BatchResults<Integer> results = master.send(batch);
        System.out.println("批量读取结果：" + Arrays.toString(results.getValues()));
    }

}

需要注意的是，以上示例代码需要使用Modbus4J库，请务必引入相关依赖。同时，需要根据实际情况修改PLC的IP地址和读取的寄存器地址等参数。