C#使用TCP-S7协议读写西门子PLC(四)

接上一篇，我们连接PLC并握手成功，并且封装生成读写PLC的命令

C#使用TCP-S7协议读写西门子PLC(三)-CSDN博客

这里我们进行读写基础数据类型、读取DB块的字符串、宽字符串、以及一系列连续数组。

新建部分类文件SiemensS7ProtocolUtil.Integrated.cs

主要方法

读取任意连续字节数据, 任意多个Byte读取--每次最多读取200个字节，如果超过200，自动分多次读取

public OperateResult ReadSerialData(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber, int readByteCount) 

写入任意连续的字节数组，每次写入400个字节，如果多于400个，分多次写入

public OperateResult WriteSerialData(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber, byte[] data)

读取一种基础数据类型

public OperateResult ReadData(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber) 

写入一种基础数据类型

public OperateResult WriteData(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber, T data)

读取连续Real【Float】数组

public OperateResult ReadSerialRealArray(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber, int realDataCount) 

写连续Real数组

public OperateResult WriteSerialRealArray(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber, float[] realArray) 

写入字符串

public OperateResult DB_WriteString(ushort dbNumber, ushort offsetAddress, int maxLength, string writeString)

读取字符串

public OperateResult DB_ReadString(ushort dbNumber, ushort offsetAddress, byte maxLength)

部分类SiemensS7ProtocolUtil.Integrated.cs相关源程序如下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PlcSiemesS7Demo
{
    /// 

    /// 综合读写S7协议操作，
    /// 所有读操作都统一使用方法:ReadSerialData(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber, int readByteCount) 
    /// 所有写操作都统一使用方法:WriteSerialData(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber, byte[] data)
    /// 
    public partial class SiemensS7ProtocolUtil
    {
        /// 

        /// 读取任意连续字节数据,因西门子PLC的每个DB块的最大偏移量是65535，因此最多读取65536个字节数据
        /// 任意多个Byte读取--每次最多读取200个字节，如果超过200，自动分多次读取
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        public OperateResult ReadSerialData(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber, int readByteCount) 
        {
            byte[] destArray = new byte[readByteCount];
            int pageSize = (readByteCount + 199) / 200;
            for (int i = 0; i < pageSize; i++)
            {
                int byteCount = 200;//每次读取200个字节
                if (i + 1 == pageSize) //最后一次读取剩余字节
                {
                    byteCount = readByteCount - 200 * i;
                }
                OperateResult resultAddress = AnalysisAddress(plcRegisterCategory, offsetAddress, dbNumber);
                OperateResult operateResult = Read(new OperateResult[] { resultAddress }, new ushort[] { (ushort)byteCount });
                if (!operateResult.IsSuccess) 
                {
                    return operateResult;
                }
                Array.Copy(operateResult.Content, 0, destArray, 200 * i, byteCount);
                offsetAddress += 200;
            }
            return OperateResult.CreateSuccessResult(destArray);
        }

        /// 

        /// 写入任意连续的字节数组，每次写入400个字节，如果多于400个，分多次写入
        /// 因西门子PLC的每个DB块的最大偏移量是65535，因此最多写入65536个字节数据
        /// 
        /// 
        /// 
        ///