1. OPERATIONAL OVERVIEW
1-104
1.52.7 Responsibility transfer alert
MSC302(87) requires the use of the “responsibility transfer alert” which functions in
the multiple sensor, multiple equipment installation. When one sensor or one equip-
ment fails but does not disturb the system operation (other sensor or equipment is nor-
mal), the AMS automatically sends the “responsibility transfer alert” (ACN sentence)
to the sensor or equipment that generated the alert.
If the sensor or equipment refuses the responsibility transfer, normal operation is re-
stored.
If the HBT sentence is not received from the AMS within the prescribed time interval,
the alert processed as responsibility transfer alert is made active.
CAM HMI
ALF
External
Equipment
Sensor
A
Check if there
is problem for
system
Some
alerts
occur
ACN
Sensor
B
AMS
HBT
Sensor
A
Some alerts occur
Responsibility transfered
HBT timeout computed
Alerts re-generated
Sensor
B