modbus_get_response_timeout - Man Page

get timeout for response


int modbus_get_response_timeout(modbus_t *ctx, uint32_t *to_sec, uint32_t *to_usec);


The modbus_get_response_timeout() function shall return the timeout interval used to wait for a response in the to_sec and to_usec arguments.

Return Value

The function shall return 0 if successful. Otherwise it shall return -1 and set errno.


uint32_t old_response_to_sec;
uint32_t old_response_to_usec;

/* Save original timeout */
modbus_get_response_timeout(ctx, &old_response_to_sec, &old_response_to_usec);

/* Define a new and too short timeout! */
modbus_set_response_timeout(ctx, 0, 0);

See Also

modbus_set_response_timeout(3) modbus_get_byte_timeout(3) modbus_set_byte_timeout(3)


The libmodbus documentation was written by Stéphane Raimbault <>

Referenced By

libmodbus(7), modbus_get_byte_timeout(3), modbus_get_indication_timeout(3), modbus_set_byte_timeout(3), modbus_set_indication_timeout(3), modbus_set_response_timeout(3).

01/25/2024 libmodbus v3.1.7 libmodbus Manual