| 摘要 |
FIELD: computation engineering. ^ SUBSTANCE: method involves applying additional protection of communication channels transmitting alarm unit switch-in/off codes. The alarm unit is automatically blocked after having received switch-in code. Necessary condition of alarm system switch-off is usage of two codes in strictly defined sequence: block removal code and alarm switch-off code. Alarm system coming into operation on some cause, the alarm unit is additionally blocked to exclude reception of any other control codes for some predetermined time. ^ EFFECT: high protection reliability level. |
