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F
Fieldbus
™
OUNDATION
December 2022
Table 8-31: Block Error Conditions
Condition
number
13
14
15
8.12.2
Modes
The ISEL function block supports three modes of operation as defined by the
MODE_BLK parameter:
•
Manual (Man): The block output (OUT) may be set manually.
•
Automatic (Auto): OUT reflects the analog input measurement or the simulated
value when simulation is enabled.
•
Out of service (O/S): The block is not processed. The BLOCK_ERR parameter
shows Out of Service. In this mode, you can make changes to all configurable
parameters. The target mode of a block may be restricted to one or more of
the supported modes.
8.12.3
Alarm detection
A block alarm will be generated whenever the BLOCK_ERR has an error bit set.
The types of block error for the ISEL block are defined above.
Alarms are grouped into five levels of priority,
Table 8-32: Alarm Priorities
Priority
number
0
1
2
3-7
8-15
208
(continued)
Condition name and description
Device Needs Maintenance Now
Power Up: The device was just powered up.
Out of Service: The actual mode is out of service.
Priority description
The priority of an alarm condition changes to
caused the alarm is corrected.
An alarm condition with a priority of
is not reported to the operator.
An alarm condition with a priority of
does not require operator attention (such as diagnostics and system
alerts).
Alarm conditions of priority
increasing priority.
Alarm conditions of priority
priority.
Table
8-32.
after the condition that
0
is recognized by the system, but
1
is reported to the operator, but
2
through
are advisory alarms of
3
7
to
are critical alarms of increasing
8
15
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