Hardware Auto Flow Control - Newland HR3250 Marlin User Manual

Hardware Auto Flow Control

If this feature is enabled, the scanner determines whether to transmit data based on CTS signal level. When CTS signal is
at a low level which means the serial port's cache memory of receiving device (such as PC) is full, the scanner sends data
through RS-232 port until CTS signal is set to high level by receiving device. When the scanner is not ready for receiving, it
will set RTS signal to low level. When sending device (such as PC) detects it, it will not send data to the scanner any more
to prevent data loss.
If this feature is disabled, reception/transmission of serial data will not be influenced by RTS/CTS signal.
**【Disable Hardware Auto Flow Control】
Before enabling this feature, make sure that RTS/CTS signal line is contained in RS-232 cable.
Without the signal line, RS-232 communication errors will occur.
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【Enable Hardware Auto Flow Control】
【Enter Setup】
**【Exit Setup】