: If your application requires a serial COM port but you are connected via USB, you may also need to install the USB Virtual COM Port Driver specifically for the CT-S280/310 series. Key Technical Specifications
Citizen provides a dedicated Windows Driver package that supports Windows 7 (both 32-bit and 64-bit versions). Installation Steps for Windows 7 Drivers & Tools | CT-E351 - Citizen Systems citizen tz30m01 driver windows 7 hot
When prompted by the installer, to the computer and power it on. : If your application requires a serial COM