Digital Monitoring Products, Inc. | 9800 Series Installation and Programming Guide
19
Wiegand Code Length
When using a custom credential, enter the total number of
bits to be received in Wiegand code including parity bits.
Press any select key or area to enter a number between
1-255 to equal the number of bits. Default is
26
bits.
An access card contains data bits for a site code, user code,
and start/stop/parity bits. The starting position, location, and
code length must be determined and programmed into the
keypad. See Figure 10.
WIEGAND CODE
LENGTH:
26
0 1 1 1 0 1 0 1 1 0 1 1 0 1 0 1 0 0 0 1 1 0 0 1 1 1
First Bit
Received
Position = 0
Site Code
Position = 1
Length = 8
User Code
Position = 9
Length = 16
Last Bit
Received
Position = 25
Example:
Wiegand Code Length = 26 bits
Figure 10: Wiegand Data Stream Bit Location
