Trend Object; View Object - YOKOGAWA Admag TI Series User Manual

4.6.3

Trend Object

It is possible to set the parameter so that the function block automatically transmits Trend. This
product has ten Trend objects, eight of which are used for Trend in analog mode parameters and
two is used for Trend in discrete mode parameter. A single Trend object specifies the trend of one
parameter.
Each Trend object has the parameters listed in Table 4.8. The first four parameters are the
items to be set. Before writing to a Trend object, it is necessary to release the WRITE_LOCK
parameter.
Table 4.8 Parameters for Trend Objects
Sub-index
1 Block Index
Parameter Relative
2
Index
3 Sample Type
4 Sample Interval
5 Last Update
6 to 21 List of Status
21 to 37 List of Samples
Ten trend objects are factory-set as shown Table 4.9.
Table 4.9 Factory Setting for Trend Objects
Index
32000 TREND_FLT.1
to 32007 to TREND_FLT.8
32008 TREND_DIS.1
to 32009 to TREND_DIS.2
4.6.4

View Object

This object forms a group of parameters in a block. One advantage brought by forming groups
of parameters is the reduction of load for data transactions. For contents of View Object, refer to
Tables 4.11 to 4.16. Roles of VIEW_1 to VIEW_4 are shown in Table 4.10.
Table 4.10 Purpose of Each View Object
Parameter
Name
Set of dynamic parameters required by the operator for plant operation.
VIEW_1
(PV, SV, OUT, Mode, etc.)
Set of static parameters which need to be collectively shown to the plant operator.
VIEW_2
(Range etc.)
VIEW_3 Set of all the dynamic parameters.
VIEW_4 Set of static parameters for configuration or maintenance.
Parameter Name
Sets the leading index of the function block that takes a trend.
Sets the index of parameters taking a trend by a value relative to
the beginning of the function block. For example, the following
three types of trends are possible in the AI block of this product.
7:
8:
19: FIELD_VAL
Specifies how trends are taken. Choose one of the following two
types:
1:
2:
Specifies sampling intervals in units of 1/ 32msec.
Set the integer multiple of the function block execution.
The last sampling time.
Status part of a sampled parameter.
Data part of a sampled parameter.
Parameter Name
No setting
No setting
<4. Configuration>
Description
PV
OUT
Sampled upon execution of a function block.
The average value is sampled.
Factory Settings
Description
30
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