MODBUS_READ_INPUT_BI(3) Libmodbus Manual MODBUS_READ_INPUT_BI(3)NAMEmodbus_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 ALSOmodbus_read_input_registers(3)AUTHORS
The libmodbus documentation was written by Stéphane Raimbault
<stephane.raimbault@gmail.com[1]>
NOTES
1. stephane.raimbault@gmail.com
mailto:stephane.raimbault@gmail.com
libmodbus 3.1.0 10/06/2013 MODBUS_READ_INPUT_BI(3)