完善 。S7 ，不在引用第三方依赖。

src/main/java/com/qgs/dc/s7/controller/S7DemoController.java

@@ -88,6 +88,12 @@ public class S7DemoController {
 
         return R.ok().put("l",(l1-l)).put("c",(c2-c1));
     }
+    @PostMapping("/testFor1200")
+    public R testFor1200() throws UnsupportedEncodingException, ParseException {
+        Object subs = s7Service.read(PlcVarActual.INT1200, S7Client.S7_1200);
+
+        return R.ok();
+    }
 
     //demo3
     @PostMapping("/writeTest")

src/main/java/com/qgs/dc/s7/my/s7connector/api/utils/ByteUtil.java

@@ -0,0 +1,328 @@
+package com.qgs.dc.s7.my.s7connector.api.utils;
+
+import java.nio.ByteOrder;
+
+/**
+ * @Desc: ""
+ * @Author: caixiang
+ * @DATE: 2022/4/1 17:32
+ */
+//对数字和字节进行转换。 假设数据存储是以大端模式存储的：
+//        byte: 字节类型 占8位二进制 00000000
+//        char: 字符类型 占2个字节 16位二进制 byte[0] byte[1]
+//        int : 整数类型 占4个字节 32位二进制 byte[0] byte[1] byte[2] byte[3]
+//        long: 长整数类型 占8个字节 64位二进制 byte[0] byte[1] byte[2] byte[3] byte[4] byte[5]
+//        long: 长整数类型 占8个字节 64位二进制 byte[0] byte[1] byte[2] byte[3] byte[4] byte[5] byte[6] byte[7]
+//        float: 浮点数(小数) 占4个字节 32位二进制 byte[0] byte[1] byte[2] byte[3]
+//        double: 双精度浮点数(小数) 占8个字节 64位二进制 byte[0] byte[1] byte[2] byte[3] byte[4]byte[5] byte[6] byte[7]
+
+public class ByteUtil {
+
+    /**
+     * int转byte
+     *
+     * @param intValue int值
+     * @return byte值
+     */
+    public static byte intToByte(int intValue) {
+        return (byte) intValue;
+    }
+
+    /**
+     * byte转无符号int
+     *
+     * @param byteValue byte值
+     * @return 无符号int值
+     * @since 3.2.0
+     */
+    public static int byteToUnsignedInt(byte byteValue) {
+        // Java 总是把 byte 当做有符处理；我们可以通过将其和 0xFF 进行二进制与得到它的无符值
+        return byteValue & 0xFF;
+    }
+
+    /**
+     * byte数组转short<br>
+     * 默认以小端序转换
+     *
+     * @param bytes byte数组
+     * @return short值
+     */
+    public static short bytesToShort(byte[] bytes) {
+        return bytesToShort(bytes, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * byte数组转short<br>
+     * 自定义端序
+     *
+     * @param bytes     byte数组
+     * @param byteOrder 端序
+     * @return short值
+     */
+    public static short bytesToShort(byte[] bytes, ByteOrder byteOrder) {
+        if (ByteOrder.LITTLE_ENDIAN == byteOrder) {
+            //小端模式，数据的高字节保存在内存的高地址中，而数据的低字节保存在内存的低地址中
+            return (short) (bytes[0] & 0xff | (bytes[1] & 0xff) << Byte.SIZE);
+        } else {
+            return (short) (bytes[1] & 0xff | (bytes[0] & 0xff) << Byte.SIZE);
+        }
+    }
+
+    /**
+     * short转byte数组<br>
+     * 默认以小端序转换
+     *
+     * @param shortValue short值
+     * @return byte数组
+     */
+    public static byte[] shortToBytes(short shortValue) {
+        return shortToBytes(shortValue, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * short转byte数组<br>
+     * 自定义端序
+     *
+     * @param shortValue short值
+     * @param byteOrder  端序
+     * @return byte数组
+     */
+    public static byte[] shortToBytes(short shortValue, ByteOrder byteOrder) {
+        byte[] b = new byte[Short.BYTES];
+        if (ByteOrder.LITTLE_ENDIAN == byteOrder) {
+            b[0] = (byte) (shortValue & 0xff);
+            b[1] = (byte) ((shortValue >> Byte.SIZE) & 0xff);
+        } else {
+            b[1] = (byte) (shortValue & 0xff);
+            b[0] = (byte) ((shortValue >> Byte.SIZE) & 0xff);
+        }
+        return b;
+    }
+
+    /**
+     * byte[]转int值<br>
+     * 默认以小端序转换
+     *
+     * @param bytes byte数组
+     * @return int值
+     */
+    public static int bytesToInt(byte[] bytes) {
+        return bytesToInt(bytes, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * byte[]转int值<br>
+     * 自定义端序
+     *
+     * @param bytes     byte数组
+     * @param byteOrder 端序
+     * @return int值
+     */
+    public static int bytesToInt(byte[] bytes, ByteOrder byteOrder) {
+        if (ByteOrder.LITTLE_ENDIAN == byteOrder) {
+            return bytes[0] & 0xFF | //
+                    (bytes[1] & 0xFF) << 8 | //
+                    (bytes[2] & 0xFF) << 16 | //
+                    (bytes[3] & 0xFF) << 24; //
+        } else {
+            return bytes[3] & 0xFF | //
+                    (bytes[2] & 0xFF) << 8 | //
+                    (bytes[1] & 0xFF) << 16 | //
+                    (bytes[0] & 0xFF) << 24; //
+        }
+
+    }
+
+    /**
+     * int转byte数组<br>
+     * 默认以小端序转换
+     *
+     * @param intValue int值
+     * @return byte数组
+     */
+    public static byte[] intToBytes(int intValue) {
+        return intToBytes(intValue, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * int转byte数组<br>
+     * 自定义端序
+     *
+     * @param intValue  int值
+     * @param byteOrder 端序
+     * @return byte数组
+     */
+    public static byte[] intToBytes(int intValue, ByteOrder byteOrder) {
+
+        if (ByteOrder.LITTLE_ENDIAN == byteOrder) {
+            return new byte[]{ //
+                    (byte) (intValue & 0xFF), //
+                    (byte) ((intValue >> 8) & 0xFF), //
+                    (byte) ((intValue >> 16) & 0xFF), //
+                    (byte) ((intValue >> 24) & 0xFF) //
+            };
+
+        } else {
+            return new byte[]{ //
+                    (byte) ((intValue >> 24) & 0xFF), //
+                    (byte) ((intValue >> 16) & 0xFF), //
+                    (byte) ((intValue >> 8) & 0xFF), //
+                    (byte) (intValue & 0xFF) //
+            };
+        }
+
+    }
+
+    /**
+     * long转byte数组<br>
+     * 默认以小端序转换<br>
+     * from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
+     *
+     * @param longValue long值
+     * @return byte数组
+     */
+    public static byte[] longToBytes(long longValue) {
+        return longToBytes(longValue, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * long转byte数组<br>
+     * 自定义端序<br>
+     * from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
+     *
+     * @param longValue long值
+     * @param byteOrder 端序
+     * @return byte数组
+     */
+    public static byte[] longToBytes(long longValue, ByteOrder byteOrder) {
+        byte[] result = new byte[Long.BYTES];
+        if (ByteOrder.LITTLE_ENDIAN == byteOrder) {
+            for (int i = 0; i < result.length; i++) {
+                result[i] = (byte) (longValue & 0xFF);
+                longValue >>= Byte.SIZE;
+            }
+        } else {
+            for (int i = (result.length - 1); i >= 0; i--) {
+                result[i] = (byte) (longValue & 0xFF);
+                longValue >>= Byte.SIZE;
+            }
+        }
+        return result;
+    }
+
+    /**
+     * byte数组转long<br>
+     * 默认以小端序转换<br>
+     * from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
+     *
+     * @param bytes byte数组
+     * @return long值
+     */
+    public static long bytesToLong(byte[] bytes) {
+        return bytesToLong(bytes, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * byte数组转long<br>
+     * 自定义端序<br>
+     * from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
+     *
+     * @param bytes     byte数组
+     * @param byteOrder 端序
+     * @return long值
+     */
+    public static long bytesToLong(byte[] bytes, ByteOrder byteOrder) {
+        long values = 0;
+        if (ByteOrder.LITTLE_ENDIAN == byteOrder) {
+            for (int i = (Long.BYTES - 1); i >= 0; i--) {
+                values <<= Byte.SIZE;
+                values |= (bytes[i] & 0xff);
+            }
+        } else {
+            for (int i = 0; i < Long.BYTES; i++) {
+                values <<= Byte.SIZE;
+                values |= (bytes[i] & 0xff);
+            }
+        }
+
+        return values;
+    }
+
+    /**
+     * double转byte数组<br>
+     * 默认以小端序转换<br>
+     *
+     * @param doubleValue double值
+     * @return byte数组
+     */
+    public static byte[] doubleToBytes(double doubleValue) {
+        return doubleToBytes(doubleValue, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * double转byte数组<br>
+     * 自定义端序<br>
+     * from: https://stackoverflow.com/questions/4485128/how-do-i-convert-long-to-byte-and-back-in-java
+     *
+     * @param doubleValue double值
+     * @param byteOrder   端序
+     * @return byte数组
+     */
+    public static byte[] doubleToBytes(double doubleValue, ByteOrder byteOrder) {
+        return longToBytes(Double.doubleToLongBits(doubleValue), byteOrder);
+    }
+
+    /**
+     * byte数组转Double<br>
+     * 默认以小端序转换<br>
+     *
+     * @param bytes byte数组
+     * @return long值
+     */
+    public static double bytesToDouble(byte[] bytes) {
+        return bytesToDouble(bytes, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * byte数组转double<br>
+     * 自定义端序<br>
+     *
+     * @param bytes     byte数组
+     * @param byteOrder 端序
+     * @return long值
+     */
+    public static double bytesToDouble(byte[] bytes, ByteOrder byteOrder) {
+        return Double.longBitsToDouble(bytesToLong(bytes, byteOrder));
+    }
+
+    /**
+     * 将{@link Number}转换为
+     *
+     * @param number 数字
+     * @return bytes
+     */
+    public static byte[] numberToBytes(Number number) {
+        return numberToBytes(number, ByteOrder.LITTLE_ENDIAN);
+    }
+
+    /**
+     * 将{@link Number}转换为
+     *
+     * @param number    数字
+     * @param byteOrder 端序
+     * @return bytes
+     */
+    public static byte[] numberToBytes(Number number, ByteOrder byteOrder) {
+        if (number instanceof Double) {
+            return doubleToBytes((Double) number, byteOrder);
+        } else if (number instanceof Long) {
+            return longToBytes((Long) number, byteOrder);
+        } else if (number instanceof Integer) {
+            return intToBytes((Integer) number, byteOrder);
+        } else if (number instanceof Short) {
+            return shortToBytes((Short) number, byteOrder);
+        } else {
+            return doubleToBytes(number.doubleValue(), byteOrder);
+        }
+    }
+}

src/main/java/com/qgs/dc/s7/my/s7connector/api/utils/ByteUtils.java

@@ -6,8 +6,6 @@ package com.qgs.dc.s7.my.s7connector.api.utils;
  * @DATE: 2021/12/16 9:08
  */
 
-import cn.hutool.core.util.ByteUtil;
-
 import java.io.UnsupportedEncodingException;
 import java.nio.ByteOrder;
 import java.nio.charset.StandardCharsets;

src/main/java/com/qgs/dc/s7/my/s7connector/enmuc/PlcVarActual.java

@@ -21,12 +21,13 @@ public enum PlcVarActual {
     DTL("DTL",PlcVar.DTL,1,DaveArea.DB,3,44,0),
     STRING1("STRING",PlcVar.STRING,1,DaveArea.DB,3,62,0,20),
     SUBID0("SUBID0",PlcVar.STRING,1,DaveArea.DB,3,3270,0),
+    INT1200("INT1200",PlcVar.INT,1,DaveArea.DB,1,2,0),
 
     //数组变量
     CharArrays("CharArrays",PlcVar.CHAR_Array,2,DaveArea.DB,3,834,0),
     BooleanArrays("BooleanArrays",PlcVar.BOOL_Array,2,DaveArea.DB,3,830,0),
-    SubIdArrays("SubIdArrays",PlcVar.STRING_Array,60,DaveArea.DB,3,3270,0,18)
+    SubIdArrays("SubIdArrays",PlcVar.STRING_Array,60,DaveArea.DB,3,3270,0,18),
-
+    SubIdArrays1200("SubIdArrays1200",PlcVar.STRING_Array,60,DaveArea.DB,1,20,0,18)
 
 
 

src/main/java/com/qgs/dc/s7/my/s7connector/service/S7Service.java

@@ -115,6 +115,56 @@ public class S7Service {
             return plcVarActual.getType().toObject(read);
         }
     }
+    public Object read(DaveArea area, Integer areaNumber, Integer byteOffset, Integer bitOffset, Integer length, Integer strSizes, PlcVar type,S7Client s7Client) throws UnsupportedEncodingException, ParseException {
+        S7Connector connector = s7Client.getConnector();
+        //String 类型比较特殊。 String[] 也是同理，Sring数组里面的子项 也是有两个字节的 readBytes。
+        if(type.equals(PlcVar.STRING)){
+            Integer readBytes = 2;
+            byte[] read = connector.read(
+                    area,
+                    areaNumber,
+                    readBytes,
+                    byteOffset,
+                    bitOffset,
+                    type.getTransportSize()
+            );
+
+            Integer allLength = Integer.valueOf(read[1])+2;
+            byte[] readF = connector.read(
+                    area,
+                    areaNumber,
+                    allLength,
+                    byteOffset,
+                    bitOffset,
+                    type.getTransportSize()
+            );
+            return type.toObject(readF);
+        }else if(type.equals(PlcVar.STRING_Array)){
+            Integer arrayLength =  length;
+            Integer strSize =  strSizes;
+
+            byte[] read = connector.read(
+                    area,
+                    areaNumber,
+                    arrayLength*(strSize+2),
+                    byteOffset,
+                    bitOffset,
+                    type.getTransportSize()
+            );
+            return ByteUtils.toStrArray(read, arrayLength, strSize);
+        }else {
+            Integer readBytes = type.getTransportSize().getSizeInBytes() * length;
+            byte[] read = connector.read(
+                    area,
+                    areaNumber,
+                    readBytes,
+                    byteOffset,
+                    bitOffset,
+                    type.getTransportSize()
+            );
+            return type.toObject(read);
+        }
+    }
 
     /**
      *
@@ -194,9 +244,41 @@ public class S7Service {
                     plcVarActual.getType()
             );
         }
+    }
+    public void write(DaveArea area, Integer areaNumber, Integer byteOffset, Integer bitOffset,Integer strSize, PlcVar type, Object newValue, S7Client s7Client){
+        S7Connector connector = s7Client.getConnector();
 
-
+        //String 类型比较特殊。 String[] 也是同理，Sring数组里面的子项 也是有两个字节的 readBytes。
-
+        if(type.equals(PlcVar.STRING)){
+            connector.write(
+                    area,
+                    areaNumber,
+                    byteOffset,
+                    bitOffset,
+                    ByteUtils.strToBytes(newValue.toString(), strSize),
+                    type
+            );
+        }else if(type.equals(PlcVar.STRING_Array)){
+            //todo here 检查 read write service
+            connector.write(
+                    area,
+                    areaNumber,
+                    byteOffset,
+                    bitOffset,
+                    ByteUtils.strArrayToBytes((String[])newValue, strSize),
+                    type
+            );
+        }else {
+            byte[] bytes = type.toBytes(newValue);
+            connector.write(
+                    area,
+                    areaNumber,
+                    byteOffset,
+                    bitOffset,
+                    bytes,
+                    type
+            );
+        }
     }
 
 }