Handshaking - Datalogic PowerScan RF Programming Manual

Handshaking

Hardware
Handshaking
RF Programming Manual
Review your system documentation to identify handshaking require-
ments, and use these labels to change the settings if required. The fol-
lowing brief descriptions explain each selection.
CTS/RTS Flow Control - is hardware handshaking. The scanner acti-
vates 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 will not take place. If the host deactivates the CTS
line during data transmission, the host will receive additional charac-
ters for no more than 2ms
Data Label Transmission
Active
CTS
CTS Scan Control - is also a hardware handshaking. When scan con-
trol is enabled, label scanning is disabled until CTS is asserted and de-
asserted as illustrated below.
Data
Label 1
Disabled until
CTS
De-assert
1. Timing varies slightly depending upon the baud rate selected.
1
.
CTS/RTS Flow Control
Disabled
Xmission
Inactive
CTS Scan Control
Label 1
Assert
Label Transmission
Will not scan again
until toggled
Label 2
31