According to the BACnet protocol documentation:

Indicates whether (TRUE) or not (FALSE) the access controlled point this object represents is in a lockout state. When the access point is in a lockout state, any access request shall always be denied, except for an active credential for which the value LOCKOUT is contained in the Authorization_Exemptions property of the corresponding Access Credential object. For each denied access request, the Access_Event property shall be set to DENIED_LOCKOUT. An Access Point object may be set to a lockout state due to too many failed access attempts, as defined in the Max_Failed_Attempts property, or by writing TRUE to this property. When the property Lockout becomes TRUE due to too many failed access attempts, then the Access_Event property shall be set to LOCKOUT_MAX_ATTEMPTS. If TRUE is written to this property for any other reason, the Access_Event property shall be set to LOCKOUT_OTHER. When the Lockout property becomes FALSE, the Access_Event property shall be set to LOCKOUT_RELINQUISHED.

Property lockout of object accessPoint can be read and written using a single IOTag.

Text Parameters

Numeric Parameters

Tag Value

An integer value, where 0 corresponds to FALSE and any other value corresponds to TRUE.