1 modbus_set_byte_timeout(3)
2 ==========================
7 modbus_set_byte_timeout - set timeout between bytes
12 *void modbus_set_byte_timeout(modbus_t *'ctx', uint32_t 'to_sec', uint32_t 'to_usec');*
17 The *modbus_set_byte_timeout()* function shall set the timeout interval between
18 two consecutive bytes of the same message. The timeout is an upper bound on the
19 amount of time elapsed before *select()* returns, if the time elapsed is longer
20 than the defined timeout, an `ETIMEDOUT` error will be raised by the
21 function waiting for a response.
23 The value of _to_usec_ argument must be in the range 0 to 999999.
25 If both _to_sec_ and _to_usec_ are zero, this timeout will not be used at all.
26 In this case, *modbus_set_response_timeout()* governs the entire handling of the
27 response, the full confirmation response must be received before expiration of
28 the response timeout. When a byte timeout is set, the response timeout is only
29 used to wait for until the first byte of the response.
34 The function shall return 0 if successful. Otherwise it shall return -1 and set
41 The argument _ctx_ is NULL or _to_usec_ is larger than 1000000.
46 linkmb:modbus_get_byte_timeout[3]
47 linkmb:modbus_get_response_timeout[3]
48 linkmb:modbus_set_response_timeout[3]
53 The libmodbus documentation was written by Stéphane Raimbault
54 <stephane.raimbault@gmail.com>