Permalink
d2b288b Jan 16, 2014
@stephane @prodrive-ci
42 lines (27 sloc) 917 Bytes
modbus_mask_write_register(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 function shall return 1 if successful. Otherwise it shall return -1 and set
errno.
SEE ALSO
--------
linkmb:modbus_read_registers[3]
linkmb:modbus_write_registers[3]
AUTHORS
-------
Martijn de Gouw <martijn.de.gouw@prodrive.nl>
The libmodbus documentation was written by Stéphane Raimbault
<stephane.raimbault@gmail.com>