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modbus_mask_write_register()			  modbus_mask_write_register()

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 function shall return 1 if successful. Otherwise it shall return -1
       and set errno.

See also
       • modbus_read_registers <modbus_read_registers.md>

       • modbus_write_registers	<modbus_write_registers.md>

						  modbus_mask_write_register()

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