table of contents
MODBUS_READ_BITS(3) | Libmodbus Manual | MODBUS_READ_BITS(3) |
NAME¶
modbus_read_bits - read many bitsSYNOPSIS¶
int modbus_read_bits(modbus_t *ctx, int addr , int nb, uint8_t *dest);DESCRIPTION¶
The modbus_read_bits() function shall read the status of the nb bits (coils) 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.RETURN VALUE¶
The modbus_read_bits() function shall return the number of read bits if successful. Otherwise it shall return -1 and set errno.ERRORS¶
EMBMDATAToo many bits requested
SEE ALSO¶
modbus_write_bit(3) modbus_write_bits(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
05/26/2012 | libmodbus 3.0.3 |