While accessing the USB device, do not reset the display unit or remove the USB storage device.
Data on the USB storage device may be corrupted. |
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To remove the USB storage device safely, design the system to remove the device only after turning ON a system variable "#H_Control_USBDetachTrigger" and confirming "#H_Status_USBUsing" is OFF. |
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![](/otasuke/qa/gp4000/images/usb_storage02_02_e.jpg) |
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1. |
When you connect a USB storage device to the display unit, "#H_Status_USBUsing" is turned ON. |
2. |
Turn on "#H_Control_USBDetachTrigger" When you remove a USB storage device.
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3. |
"#H_Status_USBUsing" turns OFF automatically when a USB storage device can be removed. |
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