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 _modbus_mask_write_register()_ 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 The libmodbus documentation was written by Stéphane Raimbault