WIM | INSTALLATION GUIDE
Plate Conversion Modes
12/20
ISO7811 track 1 details:
Card loaded, Clock and Data signals are active-low.
Timing per character is 1575 µsec, per bit 225 µsec (= ±4450 Hz).
The characters are transmitted "backwards". Least significant bit first and ending
with the odd parity bit.
Number of leading and trailing clock zeros is 62.
odd parity
msb
lsb
1
0
1
0
1
75 µsec
5V
0V
Clock
5V
0V
Data
225 µsec
0
0
5.5
MAGSTRIPE ISO7811 TRACK 2
In this mode the license plate is converted to a magstripe ISO7811 track 2
compatible output message.
Syntax:
<SS> <plate> <ES> <LRC>
Where:
<SS>
Start sentinel (hex B = bin 1011)
<plate
>
License plate string (variable number of
characters)
<ES>
End sentinel (hex F = bin 1111)
<LRC>
Checksum. Xor all message characters
including <SS> and <ES>.
ISO7811 track 2 data consists of 4 data bits + 1 odd parity bit for each character. All
characters must be decimal numbers in the range from 0 to 9. Except for the start-
sentinel (hex B), end-sentinel (hex F) and LRC.
Because the character set only contains decimal numbers, the license plate string
must be converted from text to numbers. This conversion is done as shown in the
conversion table below.
Note
The magstripe iso7811
track 1 mode does not
require to use the LAN
connection.
The magstripe iso7811
track 1 mode is introduced
in firmware version 1.05.
