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MODBUS_READ_INPUT_RE(3)	       libmodbus Manual	       MODBUS_READ_INPUT_RE(3)

NAME
       modbus_read_input_registers - read many input registers

SYNOPSIS
       int modbus_read_input_registers(modbus_t	*ctx, int addr,	int nb,
       uint16_t	*dest);

DESCRIPTION
       The modbus_read_input_registers() function shall	read the content of
       the nb input registers to address addr of the remote device. The	result
       of the reading is stored	in dest	array as word values (16 bits).

       You must	take care to allocate enough memory to store the results in
       dest (at	least nb * sizeof(uint16_t)).

       The function uses the Modbus function code 0x04 (read input registers).
       The holding registers and input registers have different	historical
       meaning,	but nowadays it's more common to use holding registers only.

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

ERRORS
       EMBMDATA
	   Too many bits requested

SEE ALSO
       modbus_read_input_bits(3) modbus_write_register(3)
       modbus_write_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_RE(3)

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

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