AI Function Block
March 2006
5-133
Table 5-56. Analog Input Block Parameter Definitions
Label
PARAMETER_NAME
Description
Initial
Value
Range
Write Block
Mode
RO /
RW
Index
Number
Block Alarm
BLOCK_ALM
21
Data Type: DS-72
The block alarm is used for all configuration,
hardware, connection failure or system problems
in the block. The cause of the alert is entered in
the subcode field.
UNACKNOWLEDGED 21.1 RW
0=Undefined
1
=Acknowledged
2
=Unacknowledged
ALARM_STATE 21.2 RO
0=Undefined
1
=Clear-reported
2
=Clear-not reported
3
=Active-reported
4
=Active-not reported
TIME_STAMP 21.3 RO
SUBCODE 21.4 RO
VALUE 21.5 RO
Alarm Summary
ALARM_SUM
22
Data Type: DS-74 Current alert status,
unacknowledged states, unreported states, and
disabled states of the alarms associated with the
function block.
0=clear
0=acknowledged
0=reported
0=enabled
CURRENT 22.1 RO ALL
0: Discrete alarm
1: Hi Hi alarm
2: Hi Alarm
3: Lo Lo Alarm
4: Lo Alarm
7: Block alarm
UNACKNOWLEDGED 22.2 RO ALL
UNREPORTED 22.3 RO ALL
D ISABLED 22.4 RW ALL All bits: 0
Acknowledge Option
ACK_OPTION
23 ALL
0: Discrete alarm
1: Hi Hi alarm
2: Hi Alarm
3: Lo Lo Alarm
4: Lo Alarm
7: Block alarm
All bits: 0
Data Type: Bit String
0=Disable
1
=Enable
Selection of whether alarms associated with the
block will be automatically acknowledged.
Alarm Hysteresis
ALARM_HYS
24 ALL 0 − 50% 0.50%
Data Type: Float
Hysteresis on alarms.
High High Priority
HI_HI_PRI
25 ALL 0 to 15 0
Data Type: Unsigned8
The priority of the hi hi alarm.
High High Limit
HI_HI_LIM
26 ALL XD_SCALE 0
Data Type: Float
Value of analog input which will generate an alarm.
High Priority
HI_PRI
27 ALL 0 to 15 0
Data Type: Unsigned8
The priority of the high alarm.
Hi Limit
HI_LIM
28 ALL XD_SCALE 0
Data Type: Float
Value of analog input which will generate an alarm.
Low Priority
LO_PRI
29 ALL 0 to 15 0
Data Type: Unsigned8
The priority of the low alarm.
Low Limit
LO_LIM
30 ALL XD_SCALE 0
Data Type: Float
Value of analog input which will generate an alarm.
Low Low Priority
LO_LO_PRI
31 ALL 0 to 15 0
Data Type: Unsigned8
The priority of the low low alarm.
Low Low Limit
LO_LO_LIM
32 ALL XD_SCALE 0
Data Type: Float
Value of analog input which will generate an alarm.
High High Alarm
HI_HI_ALM
33
Data Type: DS-71
The status of the hi hi alarm and its associated
time stamp.
UNACKNOWLEDGED 33.1 RW
N/A
0
ALARM_STATE 33.2 RO 0
TIME_STAMP 33.3 RO 0
SUBCODE 33.4 RO 0
VALUE 33.5 RO 0
High Alarm
HI_ALM
34
Data Type: DS-71
The status of the hi alarm and its associated time
stamp.
UNACKNOWLEDGED 34.1 RW
N/A
0
ALARM_STATE 34.2 RO 0
TIME_STAMP 34.3 RO 0
SUBCODE 34.4 RO 0
VALUE 34.5 RO 0
−Continued−
5
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