HERMOS LFM 4x - Message Examples

HERMOS AG
Gartenstraße 19 • 95490 Mistelgau
Phone: +49 9279 991 - 0
E-mail: rfid@hermos.com
LFM 4x Reader Rev1.4
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www.hermos.com
Customer manual
LFM 4x Reader
RFID
WE GENERATE SOLUTIONS
10.6 Message examples
ASCII
HEX
Description
‚S‘
53
Start character
‚0‘
30
High byte message length
‚2‘
32
Lowbyte message length
‚H‘
48
Message first character: value
‚0‘
30
Message second character: destination address
CR
0D
End character
‚2‘
32*)
Highbyte – Checksum XOR
‚4‘
34*)
Lowbyte – Checksum XOR
‚3‘
33*)
Highbyte – Checksum Addition
‚A‘
41*)
Lowbyte – Checksum Addition
*): With TCP / IP transmission in the standard ASC-I1 protocol, the checksum bytes are not
transmitted. In ASC-W1 mode, however, they are also transmitted!
Calculation of the XOR checksum:
53 XOR 30 XOR 32 XOR 48 XOR 30 XOR 0D =
24
 ‚2‘ ‚4‘
Calculation of the addition-checksum:
53 + 30 + 32 + 48 + 30 + 0D =
(LSB is used)
13A
 ‚3‘ ‚A‘