HID MaxiProx DFM Reader - 5375 Manuel d'installation - Page 19
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®
MaxiProx
Installation Guide
4.3
RS232 and RS422 Card Message Specification
(Send Mode Only)
When Access Cards (transponders) are presented to the MaxiProx reader, the reader sends a
message. The message is in the following format:
C, D
All characters
ASCII character 7 or the hex value
CC
The
field is reserved for use by HID Global Corporation. The valid values are
DDDDDDDDDD
The
1FFFFFFFFF
(ASCII).
XX
The
field is a computed checksum. The checksum is calculated by first grouping the message data
CC DD DD DD DD DD
into the pairs
characters is converted from ASCII to their respective hex values. At this point, the 6 bytes are added
together. The checksum is equal to the least significant 8 bits of the result.
<CR>
is the ASCII code for a carriage return. (
<LF>
is the ASCII code for a line feed. (
For example, if the MaxiProx reads a transponder (Access Card) that contains the value
DDDDDDDDDD=01234ABCDE
Note: Each of the characters is ASCII encoded. The actual bytes (hex value) that are sent to the host
are:
The checksum was computed by adding
significant 8 bits of this result or 08 hex. The communications settings are 9600-75Hz BAUD, 8 bits, 1
stop bit, no parity.
March 2012
CCDDDDDDDDDDXX<CR><LF>
^ First character sent
X
and
are ASCII encoded, hexadecimal digits. (i.e., the hex value
E
is sent as an ASCII character
field is the transponders (Access Card) data. The valid values are
. Each pair of characters represents one byte of data. Then each pair of
0A
hex)
, the reader will report the ASCII message
<30><30><30><31><32><33><34><41><42><43><44><45><30><38><0D><0A>
00 + 01 + 23 + 4A + BC + DE = 208
© 2008-2012 HID Global Corporation. All rights reserved.
E
).
0D
hex)
0001234ABCDE08<CR><LF>.
hex. The checksum is the least
Part No. 5375-901, Rev E.1
7
is sent as an
00
7F
through
.
0000000000
through
CC=00
and
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