Desktop Reader Manual V2.1
26/02/2007
11/11
Printable
characters
ASCII value
(1 byte)
BCD codes
(4 bits + parity)
ALPHA codes
(6 bits + parity)
; 0x3B 0B (SS) 1B
< 0x3C 0C 1C
= 0x3D 0D (FS) 1D
> 0x3E 0E 1E
? 0x3F 0F (ES) 1F (ES)
@ 0x40 20
A 0x41 21
…letters.. … …
Z 0x5A 3A
[ 0x5B 3B
\ 0x5C 3C
] 0x5D 3D
^ 0x5E 3E (FS)
_ 0x5F 3F
(SS) = Start Sentinel
(FS) = Field Separator
(ES) = End Sentinel
11.4 Non ISO cards
Not all the cards follow exactly the ISO standards in the tracks.
Some cards do not limit the use of BCD codes to Track2 and 3 or ALPHA codes to Track1, some others
do not use the standard Sentinels or Field Separators.
11.5 LRC
The LRC (Longitudinal Redundancy Code) is the exclusive OR (XOR) including the Start and End
Sentinels (SS and ES) in both formats BCD and ALPHA. Its parity is also odd.
11.6 Salto Software PMS Track Commands
The PMS commands for Tracks sends the data in ASCII format. They never add the LRC because the
XOR of the characters can give a non-ASCII character and be equal to a control character of the link
PMS-HAMS producing a malfunction. The Desktop Reader and the Wall Reader Adaptor will calculate and
add the LRC in OMRON and WIEGAND interfaces if the data of the Track string finishes with the End
Sentinel (“?”).
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