When you start ModSlaveSim the main dialog is displayed - this has a display area available for the registers of the slave.

At the bottom of the window is a status bar, which is used to display error and information messages.

To obtain a demonstration of a Modbus device simulation in operation, go to the File menu and choose a simulation from Simulation Examples... (see Running Example Simulations).

A quick guide to setting up ModSlaveSim is given in the section Setting up ModSlaveSim.

To exit from ModSlaveSim, select the File → Exit menu item or type Ctrl-Q.