<6. Function block parameters and Methods>
6-4
IM 12A01A02-72E
3rd Edition : Oct. 01, 2015-00
6.2
Analog Input Block Parameters
Relative
Index
Index
Parameter
Write
Mode
Initial Value
Explanation
0
16 BLOCK_OBJECT
RO
—
Information on this block such as Block Tag, DD
Revision, Execution Time etc.
1
17 ST_REV
RO
0
The revision level of the static data associated
with the function block. The revision value will be
incremented each time a static parameter value in
the block is changed.
2
18 TAG_DESC
AUTO
Blank
The user description of the intended application of
the block.
3
19 STRATEGY
AUTO
0
The strategy field can be used to identify grouping
of block.
This data is not checked or processed by the block.
4
20 ALERT_KEY
AUTO
0
The identification number of the plant unit. This
information may be used in the host for sorting
alarms, etc.
5
21 TARGET_MODE AUTO
AUTO
Set the Target of block mode (MODE_BLK) to
Auto, Man or O/S according to the write Mode of
the parameter to be set or changed.
6
22 MODE_BLK
RO
AUTO,
AUTO | MAN | O/S,
AUTO
The mode parameter is a structured parameter
composed of the actual mode, the normal mode,
and the permitted mode.
7
23 ALARM_SUM
RO
—
The current alarm status associated with the
function block.
8
24 BATCH
AUTO
0,0,0,0
This parameter is intended to be used in Batch
applications in line with IEC 61512.
10
26 OUT
MAN
—
This parameter contains the current measurement
value from Transducer Block or configuration
adjusted engineering unit and the belonging state
in AUTO MODE.
OUT contains the value and status set by an
operator in MAN MODE.
11
27 PV_SCALE
O/S
100, 0
Conversion of the Process Variable into percent
using the high and low scale value.
12
28 OUT_SCALE
O/S 100.0, 0.0, %, 1 Scale of the Process Variable. This parameter
contains the values of the lower limit and upper
limit effective range, the code number of the
engineering unit of Process Variable and the
number of digits to the right of the decimal point.
13
29 LIN_TYPE
O/S No linearisation Type of linearisation.
No linearisation (0)
Square root (10)
14
30 CHANNEL
O/S AI1: Primary Value
AI2: Secondary value
AI3: Tertiary value
Reference to the active Transducer Block which
provides the measurement value to the Function
Blocks.
16
32 PV_FTIME
AUTO
0.000000
Time constant of a signal exponential filter for the
PV, in seconds.
17
33 FSAFE_TYPE
AUTO Storing last valid
Output Value.
Defines reaction of device, if a fault is detected.
18
34 FSAFE_VALUE
AUTO
0.000000
Default value for the OUT parameter, if sensor or
sensor electronic fault is detected. The unit of this
parameter is the same as that for the OUT one.
19
35 ALARM_HYS
AUTO
0.5
Amount the PV must return within the alarm limits
before the alarm condition clears. Alarm Hysteresis
is expressed in engineering unit.
21
37 HI_HI_LIM
AUTO
+INFINITE
Value for upper limit alarms.
23
39 HI_LIM
AUTO
+INFINITE
Value for upper limit warnings.
25
41 LO_LIM
AUTO
-INFINITE
Value for lower limit warnings.
27
43 LO_LO_LIM
AUTO
-INFINITE
Value for lower limit alarms.
30
46 HI_HI_ALM
RO
—
State of the upper limit of alarms.
31
47 HI_ALM
RO
—
State of the upper limit of warnings.
32
48 LO_ALM
RO
—
State of the lower limit of warnings.
33
49 LO_LO_ALM
RO
—
State of the lower limit of alarms.
34
50 SIMULATE
AUTO
Disabled,
0.00,
Bad
For commissioning and test purposes the input
value from the Transducer Block in the Analog input
Function Block AI-FB can be modified. That means
that the Transducer and AI-FB will be disconnected.
35
51 OUT_UNIT_TEXT AUTO
Blank
Available when PV_UNIT is “textual unit definition”.
