DragonFly On-Line Manual Pages

Search: Section:  

MODBUS_MASK_WRITE_RE(3)        Libmodbus Manual        MODBUS_MASK_WRITE_RE(3)


NAME

       modbus_mask_write_register - mask a single register


SYNOPSIS

       int modbus_mask_write_register(modbus_t *ctx, int addr, uint16_t and,
       uint16_t or);


DESCRIPTION

       The modbus_mask_write_register() function shall modify the value of the
       holding register at the address addr of the remote device using the
       algorithm:

           new value = (current value AND 'and') OR ('or' AND (NOT 'and'))

       The function uses the Modbus function code 0x16 (mask single register).


RETURN VALUE

       The modbus_mask_write_register() function shall return 1 if successful.
       Otherwise it shall return -1 and set errno.


SEE ALSO

       modbus_read_registers(3) modbus_write_registers(3)


AUTHORS

       Martijn de Gouw <martijn.de.gouw@prodrive.nl[1]> The libmodbus
       documentation was written by Stephane Raimbault
       <stephane.raimbault@gmail.com[2]>


NOTES

        1. martijn.de.gouw@prodrive.nl
           mailto:martijn.de.gouw@prodrive.nl

        2. stephane.raimbault@gmail.com
           mailto:stephane.raimbault@gmail.com

libmodbus 3.1.0                   10/06/2013           MODBUS_MASK_WRITE_RE(3)

Search: Section: