
MorphoAccess® SIGMA Series - Administrator Guide
Access Control by Authentication
2017_2000025464-v03
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381
July 17
Site-code Propagation
Site code propagation allows the usage of site code received from Wiegand input frame and
apply
the
same
to
the
output
Wiegand
frame.
Configuration
key
“wiegand.site_code_propagation” is used to enable site code propagation
0 - Disable site code propagation (Default)
1 - Enable site code propagation
Site code is stored each time, authentication happens. It is extracted from a Wiegand input
frame and Prox card. This site code will be used as output site code in the Wiegand frame
corresponding to the “wiegand.event_verify_fail” and “wiegand.event_verify_pass” formats.
For more details, please refer to Site-code Propagation section on MA SIGMA - Application note
- Wiegand formats.
Wiegand frame example (26 bits)
For Standard 26 bit - [(26, 9, 16) (1, 8, 10) P1 = (0, Even, 1-12) P2 = (25, Odd, 13-24)],
Wiegand string sent from Terminal 1 to terminal2 will be as below:
0
1
2
3
…
8
9
10
11
12
…
23 24
25
Parity 1 SITE
ID
Parity
2
0
8 bits
16 bits
1
Here,
(26,9,16): consists ID total length, ID start bit, ID length
(1,8,10): consists Site code start bit, length, value
Parity1 (P1): Even parity calculated on 0 bit from 1 to 12 bit. Parity Bit is a check whether
the data sent from one device to other is same.
Parity2 (P2): Odd parity calculated on 25 bit from 13 to 24 bit