modbus tcp写多个线圈按位解析C语言代码示例
时间: 2024-10-09 11:01:58 浏览: 40
Windows下基于ModbusTcp的Server端开发(C语言版)
Modbus TCP是一种工业标准通信协议,用于设备间的远程数据交换。如果你想通过C语言实现写入多个线圈( coils)的操作,并对这些线圈地址进行按位解析,这里是一个简单的示例。请注意,这只是一个基础框架,实际应用中需要连接到Modbus服务器并处理错误处理:
```c
#include <stdio.h>
#include <string.h>
#include "modbus_tcp_client.h" // 假设这是包含Modbus客户端函数的库
// 定义线圈数据结构和地址列表
typedef struct {
uint16_t coil_address; // 线圈地址
bool value; // 线圈状态
} CoilData;
CoilData coils[] = { {0x0001, true}, {0x0002, false}, {0x0004, true} }; // 示例线圈地址和值
void write_coils(uint16_t slave_id, uint16_t start_address, CoilData* data, int num_of_coils) {
ModbusTcpClient client;
uint16_t* coil_values = (uint16_t*)malloc(num_of_coils * sizeof(uint16_t));
// 按位解析并将状态转换为二进制值
for (int i = 0; i < num_of_coils; i++) {
coil_values[i] = (data[i].value ? 1 : 0) << (start_address + i);
}
if (client.connect_to_slave(slave_id)) {
if (client.write_multiple_coils(start_address, coil_values, num_of_coils)) {
printf("Successfully wrote to coils %d-%d\n", start_address, start_address + num_of_coils - 1);
} else {
printf("Failed to write to coils.\n");
}
free(coil_values);
} else {
printf("Failed to connect to slave.\n");
}
}
// 使用示例
int main() {
write_coils(SLAVE_ID, 0x0000, coils, sizeof(coils) / sizeof(CoilData)); // 替换 SLAVE_ID 为你的设备ID
return 0;
}
```
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