modbus_set_indication_timeout - Man Page

set timeout between indications


void modbus_set_indication_timeout(modbus_t *ctx, uint32_t to_sec, uint32_t to_usec);


The modbus_set_indication_timeout() function shall set the timeout interval used by a server to wait for a request from a client.

The value of to_usec argument must be in the range 0 to 999999.

If both to_sec and to_usec are zero, this timeout will not be used at all. In this case, the server will wait forever.

Return Value

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



The argument ctx is NULL or to_usec is larger than 1000000.

See Also

modbus_get_indication_timeout(3) modbus_get_response_timeout(3) modbus_set_response_timeout(3)


The libmodbus documentation was written by Stéphane Raimbault <>

Referenced By


05/25/2023 libmodbus v3.1.7 libmodbus Manual