
To set parity
1. Ensure that the host computer is in command mode.
2. Enter command
#102N
and press
ENTER
.
Communications Protocol
Use the following procedures to set communications protocol. Consult sections
Communication Protocol (Factory Default)” on page 7–114
“612NN Select Error Correcting
Protocol Timeout” on page 7–114
for more information.
Caution
Do not switch to ECP (command
#611
) unless the host is prepared to acknowledge each
reader transmission.
To select a communications protocol
1. Ensure that the host computer is in command mode.
2. Enter command
#610
to select basic protocol (factory default) or command
#611
to select ECP and
press
ENTER
.
Software Flow Control
Two modes of flow control are supported — software (XON/XOFF) and hardware (CTS – clear to send).
The host can enable or disable flow control with command
#
614N Select Flow Control Option.
The host can use software control characters (XON/XOFF) or the hardware CTS handshake line to
interrupt reader transmissions. When the reader is configured for software flow control, it stops transmitting
if it receives the XOFF character from the host (host software command
13H
). It resumes transmitting
only when it receives the XON character (host software command
11H
) from the host. Likewise, when
the reader is configured for hardware flow control, it stops transmitting if it detects that the CTS line is no
longer asserted. It resumes transmitting when this line is asserted. If flow control is not needed, the reader
should be configured for no flow control (
#6140 Disable Flow Control
).
Note:
TransCore recommends that XON/XOFF flow control be disabled while using the error
correcting protocol.
Use the following procedure to set flow control parameters using the terminal emulation program. See
section
“614N Select Flow Control Option” on page 7–115
To select flow control
1. Ensure that the host computer is in command mode.
2. Enter command
#6140
to disable flow control, command
#6141
to enable software flow control
(factory default), or command
#6142
to enable hardware flow control and press
ENTER
.
Chapter 8 Configuring the Encompass 4 Reader
TransCore Proprietary
8–145
Содержание encompass 4
Страница 207: ......