Several selectable card formats for the credentials used with the access control system are available to choose from in the CONFIG tab of the Configuration screen. Only one format can be used system wide.
To access and select a card format, click Configuration in the pdk io dashboard and click the CONFIG tab. Click inside the Card Format field or on the down arrow to view the drop-down list of formats, the default and most common being the Standard 26-bit Format.
A "format" is the structure of the binary data stored in the card. The number of ones and zeros, and how they are put together, determine the format and ultimately the credential number. When a card is waved in front of a reader, those numbers are sent to the access controller.
The 26-bit Wiegand format is more widely used. Card manufacturers such as HID, Indala, and AWID sell cards with this format to any dealer. This 26-bit format is recognized by all access hardware.
Over the years, formats with a higher number of bits (33, 37, 48, 50) have been added to increase card security. However, some of the higher bit formats are "proprietary" and usually carry a higher price tag. One exception is the HID 37-bit proprietary format, priced similarly to a 26-bit card.
Every card has a consecutive serial number programmed, assigned in your access control software to a cardholder. For 26-bit cards, it can go from 0 to 65,535.
But, what if two companies have the same card numbers? They could access each other´s premises.
To reduce this risk, a second number, know as facility or site code, is encoded into each card. This number can go from 0 to 255 on a 26-bit format card.
As an example, if Company A has cards numbered from 1 to 1000, with facility code 230, they would be encoded as follows:
230 - 00001
230 - 00002
230 - 00003 ...up to 230 - 01000
Company B could have the same serial numbers, but with facility code 180, and their cards would be:
180 - 00001
180 - 00002
180 - 00003 ...up to 180 - 01000
To grant access, an access control system validates the facility code AND the serial number. Company A will reject Company B cards, and vice versa, even if they have the same card serial number because the facility code does not match.
Lately, some formats have a greater number of bits, and make obsolete the notion of facility codes, because the card serial number (like the serial number on currency bills) is never duplicated at the factory. This also means faster delivery of cards, even for add-ons to existing sites, right out of stock.
Cards ship with a facility code (if used) and serial number programmed.
Select the format of the credentials used with the access control system.
MANAGE CARD FORMATS
Click the MANAGE CARD FORMATS button to view the available card formats.
Click the + icon in the lower right to add an additional card format to the existing listed card formats. The Add Card Format screen is displayed.