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| MODBUS_MASK_WRITE_RE(3) | libmodbus Manual | MODBUS_MASK_WRITE_RE(3) |
NAME
modbus_mask_write_register - mask a single registerSYNOPSIS
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(3) 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>| 04/09/2022 | libmodbus v3.1.6 |
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