table of contents
other versions
- buster 3.1.4-2
- buster-backports 3.1.6-2~bpo10+2
- testing 3.1.6-2
- unstable 3.1.6-2
MODBUS_SET_RESPONSE_(3) | libmodbus Manual | MODBUS_SET_RESPONSE_(3) |
NAME¶
modbus_set_response_timeout - set timeout for responseSYNOPSIS¶
int modbus_set_response_timeout(modbus_t *ctx, uint32_t to_sec, uint32_t to_usec);DESCRIPTION¶
The modbus_set_response_timeout() function shall set the timeout interval used to wait for a response. When a byte timeout is set, if elapsed time for the first byte of response is longer than the given timeout, an ETIMEDOUT error will be raised by the function waiting for a response. When byte timeout is disabled, the full confirmation response must be received before expiration of the response timeout.The value of to_usec argument must be in the range 0 to 999999.
RETURN VALUE¶
The function shall return 0 if successful. Otherwise it shall return -1 and set errno.ERRORS¶
EINVALThe argument ctx is NULL, or both to_sec
and to_usec are zero, or to_usec is larger than 1000000.
EXAMPLE¶
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 timeout of 200ms */ modbus_set_response_timeout(ctx, 0, 200000);
SEE ALSO¶
modbus_get_response_timeout(3) modbus_get_byte_timeout(3) modbus_set_byte_timeout(3)AUTHORS¶
The libmodbus documentation was written by Stéphane Raimbault <stephane.raimbault@gmail.com>02/28/2020 | libmodbus v3.1.6 |