RIEVTECH STUDIO SOFTWARE MANUAL In addition, you can use the System Register in the Standard Bit Address Input window. When you click the System Register button, the System Special Function Register window will pop up. There are many system special function register addresses in this window, as shown as follows. You can quickly select one to use. Certainly,the screen is connected with multiple slaves at sometime.The station number is varied.At this moment, you need to use the Index function.This function uses a word address to provide a variable station number. The setting process is shown as follows. 481