- 项目名称：siemens_plc_s7_net
- 开发语言：C语言
- 支持操作系统：windows/linux
- 测试设备：S1200
目前实现功能，实现西门子PLC通讯类，采用S7协议实现，需要在PLC侧先的以太网模块先进行配置。
#include "siemens_s7.h" //协议提供方法接口
#include "typedef.h" //部分类型宏定义- port 端口号，通常为102
- plc_type plc型号，S200、S200Smart、S300、S400、S1200、S1500
类型的代号值（软元件代码，用于区分软元件类型，如：D，R）
| 序号 | 描述 | 地址类型 |
|---|---|---|
| 1 | 中间继电器 | M |
| 2 | 输入继电器 | I |
| 3 | 输出继电器Q | Q |
| 4 | DB块寄存器DB | DB |
| 5 | V寄存器 | V |
| 6 | 定时器的值 | T |
| 7 | 计数器的值 | C |
| 8 | 智能输入寄存器 | AI |
| 9 | 智能输出寄存器 | AQ |
bool s7_connect(char* ip_addr, int port, siemens_plc_types_e plc, int* fd);
bool s7_disconnect(int fd);
byte get_plc_slot();
void set_plc_slot(byte slot);
byte get_plc_rack();
void set_plc_rack(byte rack);
byte get_plc_connection_type();
void set_plc_connection_type(byte rack);
int get_plc_local_TSAP();
void set_plc_local_TSAP(int tasp);
int get_plc_dest_TSAP();
void set_plc_dest_TSAP(int tasp);
int get_plc_PDU_length();s7_error_code_e s7_read_bool(int fd, const char* address, bool* val);
s7_error_code_e s7_read_byte(int fd, const char* address, byte* val);
s7_error_code_e s7_read_short(int fd, const char* address, short* val);
s7_error_code_e s7_read_ushort(int fd, const char* address, ushort* val);
s7_error_code_e s7_read_int32(int fd, const char* address, int32* val);
s7_error_code_e s7_read_uint32(int fd, const char* address, uint32* val);
s7_error_code_e s7_read_int64(int fd, const char* address, int64* val);
s7_error_code_e s7_read_uint64(int fd, const char* address, uint64* val);
s7_error_code_e s7_read_float(int fd, const char* address, float* val);
s7_error_code_e s7_read_double(int fd, const char* address, double* val);
s7_error_code_e s7_read_string(int fd, const char* address, int length, char** val); //need free vals7_error_code_e s7_write_bool(int fd, const char* address, bool val);
s7_error_code_e s7_write_byte(int fd, const char* address, byte val);
s7_error_code_e s7_write_short(int fd, const char* address, short val);
s7_error_code_e s7_write_ushort(int fd, const char* address, ushort val);
s7_error_code_e s7_write_int32(int fd, const char* address, int32 val);
s7_error_code_e s7_write_uint32(int fd, const char* address, uint32 val);
s7_error_code_e s7_write_int64(int fd, const char* address, int64 val);
s7_error_code_e s7_write_uint64(int fd, const char* address, uint64 val);
s7_error_code_e s7_write_float(int fd, const char* address, float val);
s7_error_code_e s7_write_double(int fd, const char* address, double val);
s7_error_code_e s7_write_string(int fd, const char* address, int length, const char* val);完整样例参见代码中main.c文件，如下提供主要代码和使用方法：
*读取地址，格式为"M100","DB100"
#ifdef _WIN32
#include <WinSock2.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#pragma warning( disable : 4996)
#define GET_RESULT(ret){ if(!ret) faild_count++; }
#include "siemens_s7.h"
int main(int argc, char** argv)
{
#ifdef _WIN32
WSADATA wsa;
if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0)
{
return -1;
}
#endif
char* plc_ip = "192.168.123.170";
int plc_port = 102;
if (argc > 1)
{
plc_ip = argv[1];
plc_port = atoi(argv[2]);
}
int fd = -1;
bool ret = s7_connect(plc_ip, plc_port, S1200, &fd);
if (ret && fd > 0)
{
s7_error_code_e ret = S7_ERROR_CODE_FAILED;
char* type = s7_read_plc_type(fd);
printf("plc type: %s\n", type);
free(type);
const int TEST_COUNT = 5000;
const int TEST_SLEEP_TIME = 1000;
int faild_count = 0;
char address[50] = { 0 };
int i = 0;
for (i = 0; i < TEST_COUNT; i++)
{
printf("==============Test count: %d==============\n", i + 1);
bool all_success = false;
//////////////////////////////////////////////////////////////////////////
bool val = true;
strcpy(address, "MX100");
ret = s7_write_bool(fd, address, val);
printf("Write\t %s \tbool:\t %d, \tret: %d\n", address, val, ret);
GET_RESULT(ret);
val = false;
ret = s7_read_bool(fd, address, &val);
printf("Read\t %s \tbool:\t %d\n", address, val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
short w_s_val = 23;
strcpy(address, "MW100");
ret = s7_write_short(fd, address, w_s_val);
printf("Write\t %s \tshort:\t %d, \tret: %d\n", address, w_s_val, ret);
GET_RESULT(ret);
short s_val = 0;
ret = s7_read_short(fd, address, &s_val);
printf("Read\t %s \tshort:\t %d\n", address, s_val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
ushort w_us_val = 255;
strcpy(address, "MW100");
ret = s7_write_ushort(fd, address, w_us_val);
printf("Write\t %s \tushort:\t %d, \tret: %d\n", address, w_us_val, ret);
GET_RESULT(ret);
ushort us_val = 0;
ret = s7_read_ushort(fd, address, &us_val);
printf("Read\t %s \tushort:\t %d\n", address, us_val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
int32 w_i_val = 12345;
strcpy(address, "DB1.70");
ret = s7_write_int32(fd, address, w_i_val);
printf("Write\t %s \tint32:\t %d, \tret: %d\n", address, w_i_val, ret);
GET_RESULT(ret);
int i_val = 0;
ret = s7_read_int32(fd, address, &i_val);
printf("Read\t %s \tint32:\t %d\n", address, i_val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
uint32 w_ui_val = 22345;
ret = s7_write_uint32(fd, address, w_ui_val);
printf("Write\t %s \tuint32:\t %d, \tret: %d\n", address, w_ui_val, ret);
GET_RESULT(ret);
uint32 ui_val = 0;
ret = s7_read_uint32(fd, address, &ui_val);
printf("Read\t %s \tuint32:\t %d\n", address, ui_val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
int64 w_i64_val = 333334554;
strcpy(address, "DB1.DBW70");
ret = s7_write_int64(fd, address, w_i64_val);
printf("Write\t %s \tuint64:\t %lld, \tret: %d\n", address, w_i64_val, ret);
GET_RESULT(ret);
int64 i64_val = 0;
ret = s7_read_int64(fd, address, &i64_val);
printf("Read\t %s \tint64:\t %lld\n", address, i64_val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
uint64 w_ui64_val = 4333334554;
strcpy(address, "DB1.DBW70");
ret = s7_write_uint64(fd, address, w_ui64_val);
printf("Write\t %s \tuint64:\t %lld, \tret: %d\n", address, w_ui64_val, ret);
GET_RESULT(ret);
int64 ui64_val = 0;
ret = s7_read_uint64(fd, address, &ui64_val);
printf("Read\t %s \tuint64:\t %lld\n", address, ui64_val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
float w_f_val = 32.454f;
strcpy(address, "DB1.DBW70");
ret = s7_write_float(fd, address, w_f_val);
printf("Write\t %s \tfloat:\t %f, \tret: %d\n", address, w_f_val, ret);
GET_RESULT(ret);
float f_val = 0;
ret = s7_read_float(fd, address, &f_val);
printf("Read\t %s \tfloat:\t %f\n", address, f_val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
double w_d_val = 12345.6789;
ret = s7_write_double(fd, address, w_d_val);
printf("Write\t %s \tdouble:\t %lf, \tret: %d\n", address, w_d_val, ret);
GET_RESULT(ret);
double d_val = 0;
ret = s7_read_double(fd, address, &d_val);
printf("Read\t %s \tdouble:\t %lf\n", address, d_val);
GET_RESULT(ret);
//////////////////////////////////////////////////////////////////////////
const char sz_write[] = "wqliceman@gmail.com";
int length = sizeof(sz_write) / sizeof(sz_write[0]);
ret = s7_write_string(fd, address, length, sz_write);
printf("Write\t %s \tstring:\t %s, \tret: %d\n", address, sz_write, ret);
GET_RESULT(ret);
char* str_val = NULL;
ret = s7_read_string(fd, address, length, &str_val);
printf("Read\t %s \tstring:\t %s\n", address, str_val);
free(str_val);
GET_RESULT(ret);
#ifdef _WIN32
Sleep(TEST_SLEEP_TIME);
#else
usleep(TEST_SLEEP_TIME* 1000);
#endif
}
printf("All Failed count: %d\n", faild_count);
//mc_remote_run(fd);
//mc_remote_stop(fd);
//mc_remote_reset(fd);
s7_disconnect(fd);
system("pause");
}
#ifdef _WIN32
WSACleanup();
#endif
}