Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
MODBUS_READ_INPUT_BI(3)	       libmodbus Manual	       MODBUS_READ_INPUT_BI(3)

NAME
       modbus_read_input_bits -	read many input	bits

SYNOPSIS
       int modbus_read_input_bits(modbus_t *ctx, int addr, int nb, uint8_t
       *dest);

DESCRIPTION
       The modbus_read_input_bits() function shall read	the content of the nb
       input bits to the address addr of the remote device. The	result of
       reading is stored in dest array as unsigned bytes (8 bits) set to TRUE
       or FALSE.

       You must	take care to allocate enough memory to store the results in
       dest (at	least nb * sizeof(uint8_t)).

       The function uses the Modbus function code 0x02 (read input status).

RETURN VALUE
       The function shall return the number of read input status if
       successful. Otherwise it	shall return -1	and set	errno.

ERRORS
       EMBMDATA
	   Too many discrete inputs requested

SEE ALSO
       modbus_read_input_registers(3)

AUTHORS
       The libmodbus documentation was written by StA(C)phane Raimbault
       <stephane.raimbault@gmail.com>

libmodbus v3.1.6		  08/10/2020	       MODBUS_READ_INPUT_BI(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO | AUTHORS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=modbus_read_input_bits&sektion=3&manpath=FreeBSD+12.2-RELEASE+and+Ports>

home | help