Micromod MOD: 30ML Functions Data Base Reference - Manual (Page 62)

MOD 30ML Functions
PROCESS ALARM DISPLAY BLOCK
GREATER OR 3 Alarm becomes active when the Alarm Input is GREATER OR
EQUAL EQUAL than (>=) the Trip Value and becomes clear when the Alarm
Input is LESS than (<) the Trip Value minus any Hysteresis value.
EQUAL 4 Alarm becomes active when the Alarm Input is EQUAL to (==) the
Trip Value and becomes clear when the Alarm Input is NOT EQUAL
to (!=) the Trip Value.
NOT EQUAL 5 Alarm becomes active when the Alarm Input is NOT EQUAL to (!=)
the Trip Value and becomes clear when the Alarm Input is to EQUAL
(==) the Trip Value.
DEVIATION 6 Alarm becomes active when the Alarm Input is GREATER than (>)
the High Trip Value or LESS than (<) the Low Trip Value. Alarm
becomes clear when the Alarm Input is to LESS OR EQUAL than
(<=) the High Trip Value minus the Hysteresis or when Alarm Input is
to GREATER OR EQUAL than (>=) the Low Trip Value plus the
Hysteresis .
06
Suppress calculation? (SUPPRESS) .............................................................................. CWR
NO 0 Alarm active is set true or false as a result of the alarm calculation
every instrument cycle, and alarm unacknowledged is set to true
only when the alarm is active this cycle and was clear the previous
cycle. Alarm unacknowledged is set to false when one of the alarm
acknowledgment signals mentioned in Attribute No. 7 is detected.
YES 1 Alarm calculation is suppressed and alarm active is clear (set to
false), alarm is acknowledged (Attribute No. 7, is set to false), and
the output qualities are set to good.
07
Unacknowledged (U) ........................................................................................................ – WR
Writing a FALSE to this output is reported as an event. If the block is in RUN or HOLD and its
loop is in RUN or HOLD, then the quality is also set GOOD, otherwise the quality is left
unchanged. Acknowledgment by the alarm acknowledge message is always allowed,
regardless of block or loop state, and is reported as an event. When the block or its loop is in
DEBUG, a write will not be reported as an event.
FALSE 0 A block output indicating the alarm has been acknowledged. The
alarm can be acknowledged as described in Section 2.6.1. Since
the user can not enter initial data, when this block is initially added to
the database in the configurator, this field will be FALSE (clear and
acknowledged), and data quality set bad.
TRUE 1 A calculated block output indicating the alarm calculation has
determined there is an unacknowledged alarm.
08
Unacknowledged Quality (UQ)........................................................................................ – WR
Writing this output is allowed, but only if the block or its loop is in DEBUG (write will not be
reported as an event).
GOOD 0 Quality is left GOOD when the quality of the acknowledge input is
bad. Quality is also GOOD when a FALSE is written to the
unacknowledged attribute and the block is in RUN or HOLD and its
loop is in RUN or HOLD.
BAD 1 Quality is set BAD when the quality of the alarm input is bad.
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