DOT Emulator

The Control Unit Emulator, also known as the DOT Emulator, is a virtual control panel designed to help users simulate various scales, inputs, and outputs. It will be used to check automation for DOT inspections, which are required for certain state projects at batch plants.

Hardware

Cables

1. Two Serial-to-USB cables (Libra Part# LP5922).
2. A Female to female Null Modem cable (Libra Part# LP72031).

Setup Instructions

1. Connect the adapters – Attach a Serial-to-USB adapter to each end of the Null Modem cable.
2. Connect to the PC – Plug both USB ends into the computer.
3. Assign COM ports – In the loopback setup:
• One port will act as the receiver—use the same port assigned to the actual Control Unit and designate it as COM1.
4. Identify the emulator port – Open Device Manager to check which COM port is recognized. That port corresponds to the emulator and sends data to Libra.

 

Software

The Libra Control Unit Emulator is installed automatically when Libra connected is installed.

1. Navigate to Services, and restart the Libra Communication Service along with the Libra Plant Control service.
2. Access C:\Libra\Deploy\Tools\ControlUnitEmulator, where you will find the application ControlUnitEmulator.exe
3. Create a desktop shortcut for ControlUnitEmulator.exe
4. Open it and configure the COM port listed in the Device Manager, which will serve as the Control Unit. (Refer to the image below)
5. Close and reopen the CU Emulator.
6. Conduct a test with Libra Connected.