ZKTeco ProCapture-T, User Manual

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16.2.1 Wiegand 26 Introduction
The system provides the embedded Wiegand 26-bit format.
Composition of the Wiegand 26-bit format: 2-bit parity check bits and 24-bit output content (user ID or
card number). The 24-bit binary code can indicate 16 777 216 (0-16 777 215) different values.
1 2 25 26
Even parity check bit User ID/Card number Odd parity check bit
The following table describes the fields.
Field Description
Even parity check
bit
The even parity check bit is determined by bits 2-13. If there is an even
number of 1's, the even parity check bit is 0. If there is an odd number of 1's,
the even parity check bit is 1.
User ID/Card
number (bit 2
through bit 25)
User ID/Card number (card code, 0-16777215) and bit 2 indicates the most
significant bit (MSB).
Odd parity check
bit
The odd parity check bit is determined by bits 14-25. If there is an even
number of 1's, the odd parity check bit is 1. If there is an odd number of 1's,
the odd parity check bit is 0.
For example: A user with the user ID of 12345 has the card number of 0013378512 and the failure ID is
set to 1.