}//释放空间关闭连接free(tab_rp_bits); modbus_close(ctx); modbus_free(ctx); MODBUS_API int modbus_read_input_bits (modbus_t * ctx, int addr, int nb,uint8_t * dest); 此函数对应于功能码 02(0x02) 读取离散量输入值(Read Input Status/DIs),各参数的意义与用法,类似于函数 modbus_read_b...
//读取离散量输入值(功能码 0x2) MODBUS_API int modbus_read_input_bits(modbus_t *ctx, int addr, int nb, uint8_t *dest); //读取保持寄存器(功能码 0x3) MODBUS_API int modbus_read_registers(modbus_t *ctx, int addr, int nb, uint16_t *dest); //读取输入寄存器(功能码 0x4) MODBUS_...
MODBUS_API int modbus_read_input_bits (modbus_t * ctx, int addr, int nb,uint8_t * dest); 此函数对应于功能码 02(0x02) 读取离散量输入值(Read Input Status/DIs),各参数的意义与用法,类似于函数 modbus_read_bits() 。 MODBUS_API int modbus_read_registers (modbus_t * ctx, int addr, in...
MODBUS_API int modbus_read_input_bits (modbus_t * ctx, int addr, int nb,uint8_t * dest); 此函数对应于功能码 02(0x02) 读取离散量输入值(Read Input Status/DIs),各参数的意义与用法,类似于函数 modbus_read_bits() 。 MODBUS_API int modbus_read_registers (modbus_t * ctx, int addr, in...
The Modbus protocol defines different data types and functions to read and write them from/to remote devices. The following functions are used by the clients to send Modbus requests: 读数据 modbus_read_bits(); modbus_read_input_bits(); ...
LOG << "Failed to modbus_read_registers, ret =" << ret; return false; } LOG << "Succeed to modbus_read_input_registers, ret =" << ret; // 步骤十一:打印返回 for(int index = 0; index < 10; index++) { LOG << QString("%1").arg(buffer16t[index]); ...
读取位(读取线圈状态) int modbus_read_bits(modbus_t *ctx, int addr, int nb, uint8_t *dest); 读取输入位(读取输入状态) int modbus_read_input_bits(modbus_t *ctx, int addr, int nb, uint8_t *dest); 读取保持寄存器 int modbus_read_registers(modbus_t *ctx, int addr, int nb, uint16...
*/intmodbus_read_bits(modbus_t*ctx,intaddr,intnb,uint8_t*dest);/* 读取输入状态,可读取多个连续输入的状态 modbus_t *ctx:Modbus实例 int addr:输入地址 int nb:读取输入的个数 uint8_t *dest:传出的状态值 */intmodbus_read_input_bits(modbus_t*ctx,intaddr,intnb,uint8_t*dest);/* ...
uint8_t *dest: 传出的状态值 */int modbus_read_bits(modbus_t *ctx, int addr, int nb, uint8_t *dest);/* 读取输入状态，可读取多个连续输入的状态 modbus_t *ctx：Modbus实例 int addr：输入地址 int nb：读取输入的个数 uint8_t *dest：传出的状态值 */int modbus_read_input_bits(modbus_...
The set slave function returns 0 (success) and then I call modbus_read_input_bits() with appropriate values. But the poll message is not going out rather I am getting error as "Error: Connection timed out: Select". Even though the poll message for read inputs returned with an error I...