The method for connecting GT SoftGOT3000 with GX Simulator3 is as follows. 
* Use GX Works3 Version 1.105K or later.

◆ For GT SoftGOT3000 Version 1
1. Display the [Specify a project] dialog and select the project to monitor. 
* Deselect [Monitoring starts when [OK] is clicked] in [Monitoring settings]. 
2. Configure the GT SoftGOT3000 communication settings. 
(1) Display the [Settings] dialog. Select [System Settings] → [Connection] → [Controller] then select the channel to use from [CH1] to [CH4]. 
(2) Select the following. 
 [Device]
  I/F: MELSOFT Simulator
  Simulator: GX Simulator3
 [GX Simulator3 setting]
  Project name: The GX Works3 project file name.

3. Start the GT SoftGOT3000 monitor. 
(1) Select [Start monitoring]. 
  The GT SoftGOT3000 monitor will start then GX Simulator3 will launch.

For information on GX Simulator3, refer to the GX Works3 manual. 
For details on how to connect GT SoftGOT3000 with GX Simulator3, refer to the GT SoftGOT3000 manual.