anti- passback

Anti-Passback

Controlling flow and occupancy

Overview• Named after ‘passback’ – passing back

a card after going through a door / gate

/ turnstile

• FEATURES:– Preventing misuse of cards– Tracking and/or restricting the number of people in an

area– Triggering system events based on area occupancy– Interlocking of reader use based on the cardholder

location

Site Suitability• Determine Entry/Exit points

– Must be controlled = No ‘sneaking’ in/out

• Controller Grouping– GAPB areas can be used across multiple controllers

• Preparedness for violations– Who will fix the problems?

• Type of enforcement– Soft & timed options

Site Suitability

Misuse / Flow Control

Misuse / Flow Control

Track / Restrict• Maintains count of people in area

• Two man rule (minimum occupancy)

• Restrict maximum occupancy

Event Triggers• Control system based on occupancy

Example: Display area status by lights connected to relay

1. Create Internal Variable(s) for relay control

Event Triggers, cont.2. Assign Internal Variable to APB area with occupancy requirement

Interlocking• Must enter an area before using

readers in the area

Interlocking, cont.

Global Anti-Passback• Allows Anti-Passback to cover whole site no matter how many

controllers.

• Uses software in addition to hardware to track cardholders at all times

Area 1

Controller AArea 2

Controller B

Global Area ‘OUT’

1. Cardholder must Exit Area 1

2. Then can Enter Area 2

Area Control• Areas can be monitored and controlled in Alarm mode• Operator can control the area (open/close) can also

move users or grant free pass

Reset/Closing• Resetting status will put allow all

users one ‘free pass’– Next card read will determine area– Doesn’t empty an area

• Users can be granted ‘free pass’ individually

• Areas can be closed which will not allow entry—exit is still allowed– Controlled by Internal Variable– Can be manually closed in Alarm Mode

Area Types• Each type of Global Area can have a

separate type to simplify Mustering

Hazardous - An area that should be evacuated in the case of an emergency on the site. Hazardous areas can contain Sub Areas as well as have Safe Areas linked to them. Normal - An area that is not subject to evacuation in case of an emergency. The standard type for all areas if mustering is not used in the system. Safe - An area, such as a muster point or safe haven, where cardholders should report in case of an emergency on-site.

Mustering• The goal of mustering is to move all

people out of hazardous areas and have an accurate count of who might remain

Mustering Reports• Historical Mustering can show status

of area at a point back in time

What about…?• What type of Anti-passback control is

suitable for large perimeters?

• How to set up a suitable mustering plan?

• What cases might make anti-passback unreliable?