Java 与 西门子PLC通信
package com.siemens.simatic;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
/***
* SIMATIC S7-200 SMART CPU SR60
* 西门子PLC通信案例
*
* @author 何智潮
* 微信: QQ11527773
* 邮箱: [email protected]
*
*/
public class SimaticClient {
protected final byte[] header = { 0x03, 0x00, 0x00, 0x16, 0x11, (byte) 0xE0, 0x00, 0x00, 0x00, 0x01, 0x00, (byte) 0xC1, 0x02, 0x01, 0x00, (byte) 0xC2, 0x02, 0x01, 0x01, (byte) 0xC0, 0x01, 0x09 };
protected final byte[] header2 = { 0x03, 0x00, 0x00, 0x19, 0x02, (byte) 0xF0, (byte) 0x80, 0x32, 0x01, 0x00, 0x00, (byte) 0xCC, (byte) 0xC1, 0x00, 0x08, 0x00, 0x00, (byte) 0xF0, 0x00, 0x00, 0x01, 0x00, 0x01, 0x03, (byte) 0xC0 };
protected final byte[] READ = { 0x03, 0x00, 0x00, 0x1F, 0x02, (byte) 0xF0, (byte) 0x80, 0x32, 0x01, 0x00, 0x00, 0x00, 0x1C, 0x00, 0x0E, 0x00, 0x00, 0x04, 0x01, 0x12, 0x0A, 0x10, 0x02, 0x00, 0x03, 0x00, 0x01, (byte) 0x84, 0x00, 0x00,
0x08 };
protected final byte[] WRITE = { 0x03, 0x00, 0x00, 0x24, 0x02, (byte) 0xF0, (byte) 0x80, 0x32, 0x01, 0x00, 0x00, 0x00, 0x05, 0x00, 0x0E, 0x00, 0x05, 0x05, 0x01, 0x12, 0x0A, 0x10, 0x02, 0x00, 0x01, 0x00, 0x01, (byte) 0x84, 0x00, 0x00,
0x50, 0x00, 0x04, 0x00, 0x08 };// length=35
protected String host = "192.168.31.253";
protected int port = 102;
protected Socket socket;
protected InputStream inputStream;
protected OutputStream outputStream;
public SimaticClient(String host, int port) {
super();
this.host = host;
this.port = port;
}
protected void connect() {
try {
if (socket != null && socket.isConnected())
return;
socket = new Socket(host, port);
outputStream = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));
inputStream = new DataInputStream(new BufferedInputStream(socket.getInputStream()));
send(header);
send(header2);
} catch (Exception e) {
e.printStackTrace();
}
}
/***
* 发送报文
*
* @param messages
* 报文
* @return 返回响应的结果
*/
public byte[] send(byte[] messages) {
connect();
byte[] result = null;
try {
outputStream.write(messages);
outputStream.flush();
byte[] first = new byte[4];
int size = 0;
int count = -1;
byte[] b = new byte[1];
while (true) {
count++;
if (size > 4 && count >= size)
break;
if (inputStream.read(b) == -1)
break;
if (count < 4)
first[count] = b[0];
if (count == 3) {
size = ((0 | first[2]) << 8) | first[3];
result = new byte[size];
result[0] = first[0];
result[1] = first[1];
result[2] = first[2];
result[3] = first[3];
}
if (count > 3) {
if (result != null && result.length > count)
result[count] = b[0];
}
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
private byte[] readNative(int first, int count) {
if (count > 102)
System.out.println("SimaticClient.read(): count不能大于102 !!!!!");
int value = 0;
// 起始位置：
byte[] posistion = new byte[3];
value = first * 8;
posistion[0] = (byte) ((value << 8) >> 24);
value = first * 8;
posistion[1] = (byte) ((value << 16) >> 24);
value = first * 8;
posistion[2] = (byte) ((value << 24) >> 24);
READ[28] = posistion[0];
READ[29] = posistion[1];
READ[30] = posistion[2];
// 读取数量：
byte[] length = new byte[2];
value = count;
length[0] = (byte) ((value << 16) >> 24);
value = count;
length[1] = (byte) ((value << 24) >> 24);
READ[23] = length[0];
READ[24] = length[1];
byte[] result = send(READ);
return result;
}
/***
* 读取VB区的数据
*
* @param first
* 起始字节
* @param count
* 返回的字节数量
* @return 返回目标数据
*/
public byte[] read(int first, int count) {
int origin = 25;
byte[] nativeResult = readNative(first, count);
int size = nativeResult.length - origin;
byte[] result = new byte[size];
for (int i = 0; i < size; i++) {
result[i] = nativeResult[i + origin];
}
return result;
}
/***
* 向VB区写入数据
*
* @param first
* 起始字节
* @param values
* 要写入的数据
* @return 返回PLC响应的信息
*/
public byte[] write(int first, byte[] values) {
if (values == null)
return null;
int origin = WRITE.length;// 报文基本长度
int length = origin + values.length;
byte[] messages = new byte[length];
for (int i = 0; i < length; i++) {
if (i < origin)
messages[i] = WRITE[i];
else
messages[i] = values[i - origin];
}
int value = 0;// 临时操作值
// 【2】【3】报文长度：
value = length;
messages[2] = (byte) ((value << 16) >> 24);
value = length;
messages[3] = (byte) ((value << 24) >> 24);
// 【15】【16】写入长度：
value = values.length + 4;
messages[15] = (byte) ((value << 16) >> 24);
value = values.length + 4;
messages[16] = (byte) ((value << 24) >> 24);
// 【23】【24】写入的数据个数：
value = values.length;
messages[23] = (byte) ((value << 16) >> 24);
value = values.length;
messages[24] = (byte) ((value << 24) >> 24);
// 【28】【29】【30】偏移量（起始位置）：
value = first * 8;
messages[28] = (byte) ((value << 8) >> 24);
value = first * 8;
messages[29] = (byte) ((value << 16) >> 24);
value = first * 8;
messages[30] = (byte) ((value << 24) >> 24);
// 位个数：
value = 8 * values.length;
messages[33] = (byte) ((value << 16) >> 24);
value = 8 * values.length;
messages[34] = (byte) ((value << 24) >> 24);
byte[] result = send(messages);
return result;
}
/***
* 打印数据
*
* @param title
* 标题
* @param messages
* 要打印的数据
*/
public static void print(String title, byte[] messages) {
if (messages == null) {
System.out.println("\n SimaticClient.class: 无结果可打印 ");
return;
}
System.out.println("\n" + title);
// System.out.println("\n 编号：");
for (int i = 0; i < messages.length; i++) {
System.out.print(" " + i);
}
System.out.println();
// System.out.println("\n 10 进制：");
for (byte m : messages) {
System.out.print(" " + (m & 0xFF));
}
System.out.println();
// System.out.println("\n 16 进制：");
for (byte m : messages) {
System.out.print(" " + Integer.toHexString(m & 0xFF).toUpperCase());
}
System.out.println("\n");
}
}
package com.siemens.simatic;
public class Demo {
public static void main(String[] args) {
try {
SimaticClient client = new SimaticClient("192.168.31.253", 102);
int count = 16;
byte[] values = createValues(1, count);
// client.send(messages); // 发送自定义报文
client.write(0, values); // 从VB0 开始写入 values
byte[] result =client.read(0, count); // 从VB0 开始读取 count个数据
//打印：第一行为下标，第二行以10进制显示结果，第三行以16进制显示结果
SimaticClient.print("返回读取VB区的数据【25】起：", result);
} catch (Exception e) {
e.printStackTrace();
}
}
//生成简单的测试数据：
public static byte[] createValues(int min, int count) {
byte[] values = new byte[count];
for (int i = 0; i < count; i++) {
values[i] = (byte) (i + min);// 注意：大于127时，数据溢出错误
}
return values;
}
}