modbus 服务端（从站）C++小项目源码

#include<stdlib.h> #include<stdio.h> #include<string.h> #include<Windows.h> #include "MODBUS_SHARE.h" #include "MODBUS_SERVER.h" #include "PORT.h" #include<iostream> unsigned char buff[256]; using namespace std; //////////////////////////////////////////////////////////////////////////////////////////////////// /*1.对单个PLC操作*/ /*读一个或多个模拟量 参数：站号，开始地址， 读的数量， 返回数据变量指针 返回：－1表示CRC校验失败，－2表示无应答， 大于零表示接收数据成功*/ /*40000*/ int MODBUS_S_ReadMultiRegD(unsigned char rtu, short int *list, int len) { unsigned short int crc16; unsigned short int crctmp; short int vartmp; //1 word = 2 byte ,一个寄存器存一个word，即 16 bit, 若一次读了32bits，则表示一次连续读了两个寄存器 memset(buff, 0x00, 255); //发送数据 unsigned long strlen; if (IsOpen()) { //接受x03查询请求 8 bytes, strlen = ReadChar(8, (char *)buff, 1000); if (strlen == 8 && buff[0] == rtu && buff[1] == 0x03) { cout << "成功接收请求并处理" << endl; //发送响应报文3+reg_count*2+2（打包） memset(buff, 0x00, 255); Sleep(10); //响应帧 buff[0] = rtu; //从设备地址 buff[1] = 0x03;//功能码 buff[2] = (unsigned char)(2*len);//数据域字节数 for ( int i = 0;i < len; i++) { buff[3 + i * 2] = (unsigned char)list[i] >> 8; buff[4 + i * 2] = (unsigned char)list[i]; } crc16 = CRC16(buff, 3+len*2); buff[len*2+3] = (unsigned char)(crc16 >> 8);//差错校验 buff[len*2+4] = (unsigned char)crc16; strlen = WriteChar(len*2+5, (char *)buff); cout <<"发送"<< strlen<< "字节" << endl; } else { cout << "未接到请求" << endl; } } return 0; } /*读一个或多个开关量 参数：站号，开始地址， 读的数量， 返回数据变量指针 返回：－1表示CRC校验失败，－2表示无应答， 大于零表示接收数据成功*/ /*00000*/ char MODBUS_S_ReadMultiRegM(unsigned char rtu, unsigned short int RegAdd, unsigned short int RegCount, bool *list) { unsigned short int crc16; unsigned short int crctmp; memset(buff, 0x00, 255); buff[0] = rtu; buff[1] = 0x01; buff[2] = (unsigned char)(RegAdd >> 8); buff[3] = (unsigned char)RegAdd; buff[4] = (unsigned char)(RegCount >> 8); buff[5] = (unsigned char)RegCount; crc16 = CRC16(buff, 6); buff[6] = (unsigned char)(crc16 >> 8); buff[7] = (unsigned char)crc16; //发送数据 unsigned long strlen; if (IsOpen()) { //发送数据 strlen = WriteChar(8, (char *)buff); if (strlen == 8) { //读数据 memset(buff, 0x00, 255); Sleep(50); strlen = ReadChar(255, (char *)buff, 1000); if (strlen == 0) { //无返回 return(-2); } else { //返回长度有效,解析接收缓冲区 if (strlen == (3 + ((RegCount + 7) / 8) + 2) && buff[0] == rtu && buff[1] == 0x01) { crc16 = CRC16(buff, 3 + ((RegCount + 7) / 8)); crctmp = buff[strlen - 2]; crctmp = crctmp << 8 | buff[strlen - 1]; if (crc16 == crctmp) { unsigned char row = 0, col = 0; for (int i = 0; i<RegCount; i++) { row = i / 8; col = i % 8; list[i] = buff[3 + row] >> col & 0x01; } } else { return(-1); } } else { return(-1); } } } else { return(-2); } } else { return(-2); } return(1); } /*读一个或多个开关量 参数：站号，开始地址， 读的数量， 返回数据变量指针 返回：－1表示CRC校验失败，－2表示无应答， 大于零表示接收数据成功*/ /*10000*/ char MODBUS_S_ReadMultiRegM_1x(unsigned char rtu, unsigned short int RegAdd, unsigned short int RegCount, bool *list) { unsigned short int crc16; unsigned short int crctmp; memset(buff, 0x00, 255); buff[0] = rtu; buff[1] = 0x02; buff[2] = (unsigned char)((RegAdd - 10001) >> 8); buff[3] = (unsigned char)(RegAdd - 10001); buff[4] = (unsigned char)(RegCount >> 8); buff[5] = (unsigned char)RegCount; crc16 = CRC16(buff, 6); buff[6] = (unsigned char)(crc16 >> 8); buff[7] = (unsigned char)crc16; //发送数据 unsigned long strlen; if (IsOpen()) { //发送数据 strlen = WriteChar(8, (char *)buff); if (strlen == 8) { //读数据 memset(buff, 0x00, 255); Sleep(50); strlen = ReadChar(255, (char *)buff, 1000); if (strlen == 0) { //无返回 return(-2); } else { //返回长度有效,解析接收缓冲区 if (strlen == (3 + ((RegCount + 7) / 8) + 2) && buff[0] == rtu && buff[1] == 0x02) { crc16 = CRC16(buff, 3 + ((RegCount + 7) / 8)); crctmp = buff[strlen - 2]; crctmp = crctmp << 8 | buff[strlen - 1]; if (crc16 == crctmp) { unsigned char row = 0, col = 0; for (int i = 0; i<RegCount; i++) { row = i / 8; col = i % 8; list[i] = buff[3 + row] >> col & 0x01; } } else { return(-1); } } else { return(-1); } } } else { return(-2); } } else { return(-2); } return(1); } /*写一个模拟量 参数：设备号，写地址， 返回数据变量指针 返回：小于零失败，大于零表示成功*/ /*40000*/ char MODBUS_S_WriteSingRegD(unsigned char rtu, unsigned short int RegAdd, short int var) { unsigned short int crc16; memset(buff, 0x00, 255); buff[0] = rtu; buff[1] = 0x03; buff[2] = (unsigned char)((RegAdd - 40001) >> 8); buff[3] = (unsigned char)(RegAdd - 40001); buff[4] = (unsigned char)(var >> 8); buff[5] = (unsigned char)var; crc16 = CRC16(buff, 6); buff[6] = (unsigned char)(crc16 >> 8); buff[7] = (unsigned char)crc16; //发送数据 unsigned long strlen; if (IsOpen()) { //发送数据 strlen = WriteChar(8, (char *)buff); if (strlen == 8) { Sleep(50); strlen = ReadChar(255, (char *)buff, 1000); //返回长度有效,解析接收缓冲区 if (!(strlen == 8 && buff[0] == rtu && buff[1] == 0x06)) { return(-1); } } else { return(-1); } } else { return(-1); } return(1); } /*写一个模拟量 参数：站号，写地址， 返回数据变量指针 返回：小于零失败，大于零表示成功*/ char MODBUS_S_WriteSingRegM(unsigned char rtu, unsigned short int RegAdd, bool var) { unsigned short int crc16; memset(buff, 0x00, 255); buff[0] = rtu; buff[1] = 0x05; buff[2] = (unsigned char)(RegAdd >> 8); buff[3] = (unsigned char)RegAdd; if (var) { buff[4] = 0xff; buff[5] = 0x00; } else { buff[4] = 0x00; buff[5] = 0x00; } crc16 = CRC16(buff, 6); buff[6] = (unsigned char)(crc16 >> 8); buff[7] = (unsigned char)crc16; //发送数据 unsigned long strlen; if (IsOpen()) { //发送数据 Sleep(50); strlen = WriteChar(8, (char *)buff); if (strlen == 8) { Sleep(50); strlen = ReadChar(255, (char *)buff, 1000); //返回长度有效,解析接收缓冲区 if (!(strlen == 8 && buff[0] == rtu && buff[1] == 0x05)) { return(-1); } } else { return(-1); } } else { return(-1); } return(1); } ////////////////////////////////////////////////////////////////////////////////////////////////////////////// /*2.对全部PLC操作*/ char MODBUS_S_A_WriteSingRegD(unsigned short int RegAdd, short int var) { unsigned short int crc16; memset(buff, 0x00, 255); buff[0] = 0xff; buff[1] = 0x06; buff[2] = (unsigned char)((RegAdd - 40001) >> 8); buff[3] = (unsigned char)(RegAdd - 40001); buff[4] = (unsigned char)(var >> 8); buff[5] = (unsigned char)var; crc16 = CRC16(buff, 6); buff[6] = (unsigned char)(crc16 >> 8); buff[7] = (unsigned char)crc16; //发送数据 unsigned long strlen; if (IsOpen()) { //发送数据 strlen = WriteChar(8, (char *)buff); if (strlen != 8) { return(-1); } } else { return(-1); } return(1); } char MODBUS_S_A_WriteSingRegM(unsigned short int RegAdd, bool var) { unsigned short int crc16; memset(buff, 0x00, 255); buff[0] = 0xff; buff[1] = 0x05; buff[2] = (unsigned char)(RegAdd >> 8); buff[3]