Filter
Top Products
37 LRP2000 Passive Reader/Writer
4
Communications Interface
4.1 Configuring the Serial Interface
4.1.1 COM1
In normal use for reading and writing RFID tags, communications with the LRP2000 occurs via the main
communications interface, COM1. This communications interface can be accessed by both point-to-point
and addressed serial communications protocols. For point-to-point serial communication, the LRP2000
supports RS232 and RS422 as the standard protocols. For multiplexed communications, Ethernet is
available as an option. The RS422 interface is especially suited for long cable lengths, and for noisy
environments.
NOTE: The delay between the characters sent to the controller cannot be longer than 200 ms.
The options for each configuration parameter for the COM1 interface are listed in Table 8.
The default configuration parameters for COM1 are listed in Table 9.
4.1.2 COM2
For the purpose of configuring the controller's operating parameters, communication occur via the auxiliary
communications interface, COM2. This auxiliary interface only communicates via RS232 and is reserved
for configuring and updating the operating parameters, and for updating the firmware in the controller. For
example, with the correct hardware dip switch settings, the COM2 interface can be used to configure the
parameters of the COM1 interface. The electronics of this interface are also optically isolated from the
other circuits of the controller.
Table 8: COM1 Parameters
Baud rate
1200, 2400, 4800, 9600,
19200, 38400 bps
Number of Data Bits 7, 8
Number of Stop Bits 1
Parity Even, Odd, None
Flow Control None, Xon/Xoff
Table 9: COM1 Defaults
Baud rate 9600 bps
Number of Data Bits 8
Number of Stop Bits 1
Parity None
Flow Control None