User's Manual

i-PORT MB – Manual
Version 1.1 02.02.2007 Page 32/ 37
5.0 INSTALLATION- CONFIGURATION
This chapter provides some useful hints and procedures how the reader should be used under different
operating modes
5.0 Device enumeration
On power-up the “To Slave” RJ45 port of the reader transparently transmits and receives data from and to
the “To Master” RJ45 port. The device responds to either the broadcast address or the last static address
assigned to the device.
Proposed enumeration algorithm on first time enumeration:
a) Send connect slave port (parameter 0x10) to the broadcast address (n times for n readers)
b) Send disconnect slave port to the broadcast address. Only the first reader with a disconnected slave
port in the chain will respond to a command send to address 0xfe now.
c) Read serial number, set unique static address for the reader with the disconnected slave port
(address 0xfe).
d) Read status (parameter 0x04) and check supply voltage (parameter 0x05).
e) Connect slave port and return to step c) (n times for n readers)
At normal application start-up a new device enumeration is not necessary but the above scheme can be used
to check for readers which might have been newly connected and which possibly have a static address which
has already been assigned to another reader. It is recommended to check whether the combination of serial
number and static address match for all readers.
5.1 First time installation (“site setup”)
− Enumerate readers
− check that voltages are OK
− store corresponding serial numbers (parameter 0x01) and short address (parameter 0x11) on host
− Setup parameters for list behaviour and RF, additionally save these in host system.
Remarks:
− After initial setup the program on the host is not expected to do frequent changes of parameters
marked as “permanent” in the table for the set parameter command.
− Apart from first time installation the application on the host application should not need to know about
parameters like i.e. the RF sensitivity.