TransCore 0596465PT15 Manuel D’Utilisation

In Figure 8-8

, Option B shows the host controlling the RF transmitter. 

If the vehicle detector is connected to the host computer, as shown in Option B, com-
mands #6400 RF Off and #6401 RF On sent from the host computer turn on and off 
the Encompass 4H Reader RF transmitter. 

, Option C shows the test configuration controlling the RF transmitter. To 

test the Encompass 4H Reader, as described in 

, you can turn on the Encompass 4H 

Reader RF transmitter continuously by issuing command #6401.

Both the RS

–

232 and RS

–

422 configurations used by the Encompass 4H Reader have 

two sense inputs — sense input0 and sense input1. The default configuration uses 
sense input0 as the presence detection device line. RF power is automatically turned 
on only when the presence detection device (loop detector or other device) detects a 
presence. Sense input1 is not used directly by the reader; it is used by the host com-
puter to monitor an external device. The Encompass 4H Reader sense inputs are 
designed to connect to a dry contact closure. 

You can configure the Encompass 4H Reader to generate input status change reports, 
which are transmitted like tag IDs. The host can then respond based on the true/false 
(closed/open) status of the sense inputs. See the section 

.

The following procedures describe how to set sense inputs using the terminal emula-
tion software. See commands 

“526 Display I/O Status” on page 7-21,

Option” on page 7-43 

for more information.

To set sense inputs
1.

Ensure that the host computer is in command mode.

2.

Enter command #526 to display the current input/output status. C0 = host 
controls outputs; C1= predefined output mode; O0 = both outputs off; O1 = 
output0 on; O2 = output1 on; O3 = both outputs on; I0 = both inputs false; I1 = 
input0 true; I2 = input1 true. 

3.

Enter command #6940 to disable input inversion (factory default) or command 
#6941

 to enable input inversion, and press ENTER. 

Both the RS

–

232 and RS

–

422 configurations used by the Encompass 4H Reader have 

two sense output circuits – sense output0 and sense output1.