TransCore 05716 Manuel D’Utilisation

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).

Use the following procedure to set flow control parameters using the terminal emula-
tion program. See section 

. 

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.

If the read zone is too wide or too deep for your application, it can be fine-tuned by 
physically adjusting the MPRR or external antenna mounting orientation, reprogram-
ming the actual RF power output (#644NN Set RF Attenuation), and/or reprogram-
ming the RF sensitivity range (#643NN Set ATA Operating Range and #645NN Set 
SeGo Protocol Tag Operating Range). The combination of these adjustments allows 
you to confine the read zone to the area where tagged vehicles pass.

See sections 

“643NN Select ATA Operating Range (Distance)” on page 7-26, “645NN 

Set SeGo Protocol Operating Range (Distance)” on page 7-27, and “644NN Set RF 
Attenuation” on page 7-26 

for more information.

, marking the read pat-