modbus_read_input_bits(3) debian man page | unix.com

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 modbus_read_input_status() 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 Stephane Raimbault <stephane.raimbault@gmail.com[1]>

NOTES
	1. stephane.raimbault@gmail.com
	   mailto:stephane.raimbault@gmail.com

libmodbus 3.0.3 						    05/26/2012						   MODBUS_READ_INPUT_BI(3)