OBID
i-scan
®
UHF
Manual
ID ISC.LRU3000/3500
FEIG ELECTRONIC GmbH
Page 18 of 193
H90202-7e-ID-B.docx
6. Interface
The ID ISC.LRU3000-A and ID ISC.LRU3500-A have 4 interface ports. The protocol frame of these
ports can be different. On the asynchronous serial interface the whole protocol frame is described
in
6.2. Serial Data Format and Protocol Frames
. The TCP/IP protocol frame is described below.
6.1. Characteristics of TCP/IP protocol
If the Reader uses the LAN or WLAN interface the data is packaged in TCP/IP protocol frames.
This means the whole data format and protocol frame which is described in
is packaged as the data of TCP/IP protocol frames.
If you use the TCP/IP protocol please be aware that the data packaged in the TCP/IP frame is
transferred with
Protocol frame: Advanced Protocol-Length
as describe below.
LAN and WLAN sockets on the reader side use the
keepalive option
for detecting interrupted
connections. The default parameters for keepalive are initialized as listed in the table:
Parameter
Value
Note
idle time
5 seconds
The reader sends every 5 seconds a keepalive probe which has to be
acknowledged by the client
repeat count
2
If a keepalive probe is not acknowledged, the reader repeats the
probe only two times with an interval of 5 seconds.
interval
5 second
If the 15 second time span is expired and no keepalive probe response is obtained from the client
the connection is closed and the client application must enable a new connection. The keepalive
parameters can be modified in the configuration pages for LAN and WLAN. This keepalive option
should not be mistake with the Keepalive message for notification mode.
6.2. Serial Data Format and Protocol Frames
The ID ISC.LRU3000-A and ID ISC.LRU3500-A can be configured by different interfaces and data
may be written on Transponders or read from Transponders. The communication between Reader
and connected host (terminal, PC, etc.) is executed by means of fixed protocols. The used protocol
is intended for data bus use and is equipped with a bus address.
During data transfer via the asynchronous interface the Reader supplies the required data or a
status byte. The reply contains the transmitted control byte.
There is no reply from the Reader if there is a protocol frame failure.
