Micromod MOD: 30ML Functions Data Base Reference User Manual
Page 61
MOD 30ML Functions
PROCESS ALARM DISPLAY BLOCK
Block
Type
PAD
This is the Process Alarm Display Block type. Block type address code is 52.
00
Version (VERSION) ........................................................................................................... – – R
The PAD block is at version 2.
01
Block Length (BLKLEN) .................................................................................................... – – R
Number of data base bytes used by this block.
02
State (STATE) .................................................................................................................... CWR
All block state changes are reported as events. See IB-23G600 (I/O Logic Book 1) Section
2.4.1, State Changes for additional information.
RUN
0
Normal Operation. Block is executed.
HOLD
1
Block is not executed. Qualities retain previous values.
OFF
2
Block is not executed. Qualities will be BAD.
DEBUG
3
Block is not executed. No fields are updated. Most attributes are
writeable.
03
Bad Inputs (BADINP)......................................................................................................... CWR
See IB-23G600 (I/O Logic Book 1) Section 2.3.2, Data Quality for additional information.
REJECTED
0
Block checks data quality on the alarm input and if it is BAD, the
unacknowledged and active outputs are left unchanged and their
qualities are set to bad. When the quality of the acknowledge input is
bad, it simply means this signal is ignored and has no affect on the
unacknowledged and active outputs or their qualities.
ACCEPTED
1
Block runs its algorithm without a check on input quality and output
quality is set to good.
04
Alarm Priority (PRIORITY)................................................................................................ CWR
0 to 255
When 0, the alarm unacknowledged field is suppressed and left at
false even when an alarm becomes active. When 1 through 255, the
priority value is ignored by this block; however, it can be used by PC-
30 for alarm reporting (e.g. alarms of different priorities may be
displayed in different colors).
05
Alarm Activate Condition (TRIPCOND)........................................................................... CWR
The alarm activate condition (trip condition)is used to compare the alarm input value with the
trip value in the alarm calculation.
LESS
0 Alarm becomes active when the Alarm Input is LESS than (<) the
Trip Value and becomes clear when the Alarm Input is GREATER
OR EQUAL than (>=) the Trip Value plus any Hysteresis value.
LESS OR EQUAL 1 Alarm becomes active when the Alarm Input is LESS OR EQUAL
than (<=) the Trip Value and becomes clear when the Alarm Input is
GREATER than (>) the Trip Value plus any Hysteresis value.
GREATER
2 Alarm becomes active when the Alarm Input is GREATER than (>)
the Trip Value and becomes clear when the Alarm Input is LESS OR
EQUAL than (<=) the Trip Value minus any Hysteresis value.
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