Chapter 2 — Configuring Interface Settings
SR60 Scanner Programmer’s Reference Manual 35
Handshaking
Review your system documentation to identify handshaking
requirements, and scan the following bar codes to change the
settings if required. The following descriptions briefly explain
each selection.
Hardware Handshaking
You can choose either CTS/RTS Flow Control or CTS Scan
Control:
• CTS/RTS Flow Control is a type of hardware handshaking.
The scanner activates the RTS (Request to Send) line when it
is ready to send data to the host. The scanner waits for an
active Clear to Send (CTS) signal from the host before
transmitting data. If hardware control is disabled, CTS/RTS
communication does not take place. If the host deactivates the
CTS line during data transmission, the host receives
additional characters for no more than 2 ms. (The timing
varies slightly, depending on the baud rate you select.)
CTS/RTS Flow Control Illustration
• CTS Scan Control is a type of hardware handshaking. When
scan control is enabled, label scanning is disabled until CTS is
asserted and de-asserted, as shown in the next illustration.
CTS Scan Control Illustration
Handshaking controls are mutually exclusive. You cannot enable
more than one of these features at a time, because enabling
multiple controls produces unpredictable results.
Label Transmission Label TransmissionXmission
CTS
Data
Active
Disabled
Inactive
Label 1 Label 2Label 1
CTS
Data
Assert
Will not scan again
until toggled
De-assert
Disabled until
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