Unitech MS837 - Software Handshaking

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Copyright 2012 unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of unitech Electronics Co., Ltd.
Invert CTS Polarity (RSV2)
-12V = Active, +12V = Inactive,
OK to send Do not send
Standard CTS Polarity
-12V = Inactive, +12V = Active,
Do not send OK to send
Activate RTS, Do Not Wait for CTS (RSV3) – Activate RTS for
transmission but do not wait for CTS to send.
Activate RTS, Wait for CTS – Wait for CTS after activating RTS.
Test CTS Not Present Before RTS (RSV4) – Do not activate RTS if
CTS is already present.
Do Not Test for CTS Present Before RTS
Enable DTR Support – The scanner will stop scanning when the Data
Terminal Ready (DTR) signal goes inactive.
Disable DTR Support
Enable RTS Counter Toggle – The scanner will toggle the RTS line on
a good decode.
Disable RTS Counter Toggle
Enable XON/XOFF Handshaking – The scanner will stop transmission
whenever on XOFF (ASCII 13H) is received. Transmission will resume
after an XON (ASCII 11H) is received.
Disable XON/XOFF Handshaking.
Software Handshaking
Enable ACK/NAK – After transmitting data, wait for an ACK (06H) or a
NAK (15H) response from the host. If ACK is received, complete the
communications cycle and look for more bar codes. If NAK is received,
retransmit the last set of bar code data and wait for ACK/NAK again.
Disable ACK/NAK
Support BEL/CAN in ACK/NAK – When BEL (07H) is received, the
scanner beeps 3 times and exits the communications loop. If a CAN
(18H) is received, then the scanner will exit the communications loop,
silently.
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