PSC Scanners Programming Manual page 23

CTS
Like XON/XOFF protocol, CTS protocol is a mechanism used to con-
trol data flow out. The CTS input is used to inform the scanner that
the host terminal is ready to accept scanned data. When CTS (+) pro-
tocol is selected, the scanner waits for a low level on its CTS input
before transmitting data. When CTS (-) is selected, the signal polari-
ties are reversed and a high level indicates data may be transmitted.
The CTS protocol may be programmed independently of the RTS pro-
tocol; however, the signal polarities must be the same. You may not
select CTS (+) and RTS (-).
RTS
The RTS output from the scanner may be programmed to operate in
one of three different modes. In the default mode RTS signals when
the scanner is ready to receive commands or data. In the second
mode, RTS is in a fixed state. In the third mode, RTS signals when the
scanner has data to transmit. The RTS modes are independent of the
CTS protocol. However, you must select the same active state for RTS
as for CTS. You may not select CTS (-) and RTS fixed low. If CTS (-) is
selected, then the active state for RTS will be high.
NOTE
HA
HB
HC
06656
The specified levels are at the modular connector and are
inverted when using an RS232 converter pod.
CTS Protocol = None*
RTS low indicates scanner ready to
receive data
Protocol = XON/XOFF
Protocol = CTS (-)
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