TransCore 05531 User Manual
Configuring the Encompass 4/4800 Multiprotocol Reader
8-19
To set baud rate
1.
Ensure that the host computer is in command mode.
2.
Enter command #100N and press ENTER.
To set stop bits
1.
Ensure that the host computer is in command mode.
2.
Enter command #101N and press ENTER.
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
through
Caution
Do not switch to ECP (command #611) unless the host is prepared to acknowledge
each reader transmission.
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
#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
(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).
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.
the error correcting protocol.