GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual page 245

The SVI FF supports multi-bit alarm notification, which allows for reporting multiple
simultaneous alarms, such as Block Alarm/Block Error. Each alarm of a multi-bit alarm is
referred to as a bit-alarm. Support for multi-bit alarms is specified using the Resource block
FEATURES and FEATURES_SEL parameters. When not selected, the behavior of a multi-bit
alarm parameter is the same as that specified for the simple alarm parameter behavior of the
Block Alarm parameter.
The device status reported through block alarms provides significantly less traffic on the bus
– the alarm is reported only when the diagnostic condition is detected.
The BLOCK_ALARM is generated when other standard FF errors are detected, including:
Block Configuration
Simulate Active
Memory Failure
Static Data Lost, etc.
In practice you must pay special attention to the way alarms are processed by the
application. Often, a single device failure triggers a set of application and device alarms
(sometimes referred as alarm explosion) and it may be difficult to find the source of the event.
Client/Server services are often used to provide additional information.
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Masoneilan SVI FF Instruction Manual
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