Hardware Auto Flow Control - Newland NLS-HR3260 Series User Manual

Hardware Auto Flow Control

If CTS flow control is enabled, the scanner determines whether to transmit data based on CTS signal
level. When CTS signal is at low level which means the serial port's cache memory of receiving device
(such as PC) is full, the scanner stops sending data through serial port until CTS signal is set to high level
by receiving device. If RTS flow control is enabled, whether the scanner receives data or not is dependent
on RTS signal level. If 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 No Flow Control is selected, reception/transmission of serial data will not be influenced by RTS/CTS
signal.
**【No Flow Control】
【CTS Flow Control】
Before enabling hardware flow control, 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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【Enter Setup】
【RTS Flow Control】
【CTS/RTS Flow Control】
**【Exit Setup】