AH500 Hardware and Operation Manual
A-10
Open the Device Manager window after the installation is finished. If the name of the USB
device connected is under Ports (COM&LPT), the installation of the driver is successful. The
operating system assigns a communication port number to the USB device.
Additional remark
If the PLC is connected to another USB port on the computer, the system may ask users to
install the driver again. The users can follow the steps above, and install the driver again. After
the driver is installed, the communication port number that the operating system assigns to the
USB device may be different.
A.3 Installing the USB Driver for an AH500 Series CPU
module in Windows 8
Windows 8 driver signature enforcement provides a way to improve the security of the operating
system by validating the integrity of a driver or system file each time it is loaded into memory.
However since Delta PLC USB driver does not include the driver signature, this section will help
users to disable driver signature enforcement functionality in Windows 8 to ensure a success Delta
PLC USB installation. This act is only valid for a single time. The setting will return to its original
state after restarting.
Steps to disable driver signature enforcement in Windows 8:
1. Press the button
【WIN】+【I】 on the keyboard to see the Setting interface. Click “Change
PC settings”.
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