Notes On Utilizing Usb Communication - Delta AS Series Operation Manual

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A.5 Notes on Utilizing USB Communication

Suggested to use USB communication in the following occasions: PLC program upload / download,
PLC parameters monitoring, and firmware upgrade.

Suggested NOT to use USB communication for applications that require long time communication and
without any connection drop.

When experiencing connection lost, you can unplug the USB cable and then plug it back in and try the
communication again.

For the first time USB communication user, you need to install the USB driver for the AS Series PLC
CPU.

If the communication is still not working after unplugging and plugging, you need to open the Devices
(Windows settings -> Devices) to see if the USB driver is still valid. The USB driver may be lost due to
Windows updates. If your USB driver is invalid, install the USB driver again.
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