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C#使用TCP-S7协议读写西门子PLC(四)

news 来源：原创 2024/9/22 3:43:49

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<byte[]> 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<T> ReadData<T>(PlcRegisterCategory plcRegisterCategory, ushort offsetAddress, ushort dbNumber)

写入一种基础数据类型

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

读取连续Real【Float】数组

public OperateResult<float[]> 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<string> 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
{/// <summary>/// 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)/// </summary>public partial class SiemensS7ProtocolUtil{/// <summary>/// 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/// </summary>/// <param name="plcRegisterCategory"></param>/// <param name="offsetAddress"></param>/// <param name="dbNumber"></param>/// <param name="readByteCount"></param>/// <returns></returns>public OperateResult<byte[]> 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<byte, int, ushort> resultAddress = AnalysisAddress(plcRegisterCategory, offsetAddress, dbNumber);OperateResult<byte[]> operateResult = Read(new OperateResult<byte, int, ushort>[] { 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);}/// <summary>/// 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/// </summary>/// <param name="plcRegisterCategory"></param>/// <param name="offsetAddress"></param>/// <param name="dbNumber"