modbus_mask_write_register - mask a single register
int modbus_mask_write_register(modbus_t *ctx, int
addr, uint16_t and, uint16_t
or);
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).
The function shall return 1 if successful. Otherwise it shall return -1 and set
errno.
modbus_read_registers(3) modbus_write_registers(3)
Martijn de Gouw <martijn.de.gouw@prodrive.nl> The libmodbus documentation
was written by Stéphane Raimbault <stephane.raimbault@gmail.com>