boolean ModBus_WriteRegisterDWord (int $InstanceID, int $Wert)
ID of the device to be switched
If the command succeeds, it returns TRUE, otherwise FALSE.
Sets address with ID InstanceID to Value
Due to a limitation of 32-bit integers within PHP, the area can only be used to 2147483647.
//Writes 123 into the register of the instance with the ID 12345 ModBus_WriteRegisterDWord(12345, 123);