Yokogawa YVP110 - Manual (Page 55)

<9. Configuration>
9-5
IM 21B04C01-01E
9.6 Block Setting
Set the parameter for function block VFD.
9.6.1 Link Object
Link object combines the data voluntarily sent
by the function block with VCR. YVP110 has 25
or 50 (with /EE) link objects. A single link object
specifies one combination. Each link object has the
parameters listed in Table 9.5. Parameters must
be changed together for each VCR because the
modifications made to each parameter may cause
inconsistent operation.
Table 9.5 Link Object Parameters
Sub-
index
Parameters Description
1 LocalIndex Sets the index of function
block parameters to be
combined; set “0” for Trend
and Alert.
2 VcrNumber Sets the index of VCR to be
combined. If set to “0”, this
link object is not used.
3 RemoteIndex Sets the index of remote
object associated with this link
object.
4 ServiceOperation Set one of the following. Set
only one each for link object
for Alert or Trend.
0: Undefined
1: Local
2: Publisher
6: Alert
7: Trend
5 StaleCountLimit Set the maximum number of
consecutive stale input values
which may be received before
the input status is set to BAD.
Setting of "2" or larger value
is recommended to avoid
unnecessary mode transfer
which is caused when
subscriber failed to receive
data correctly.
Link objects are not factory-set.
9.6.2 Trend Object
It is possible to set the parameter so that the
function block automatically transmits Trend.
YVP110 has seven or twelve (with /EE) Trend
objects, five or ten (with /EE) of them are for analog
data, and two of them are for discrete data. A single
Trend object specifies the trend of one parameter.
Each Trend object has the parameters listed in
Table 9.6. The first four parameters are the items to
be set.
Table 9.6 Parameters for Trend Objects
Sub-
index
Parameters Description
1 Block Index Sets the leading index of the
function block that takes a
trend.
2 Parameter
Relative Index
Sets the index of parameters
taking a trend by a value
relative to the beginning of
the function block.
3 Sample Type Specifies how trends are
taken. Choose one of the
following 2 types:
1: Sampled upon execution
of a function block.
2: The average value is
sampled.
4 Sample Interval Specifies sampling intervals
in units of 1/32 ms. Set
the integer multiple of the
function block execution
cycle.
5 Last Update The last sampling time.
6 to 21 List of Status Status part of a sampled
parameter.
21 to 37 List of Samples Data part of a sampled
parameter.
Objects are not factory-set.
9.6.3 View Object
This is the object to form groups of parameters
in a block. One of advantage brought by forming
groups of parameters is the reduction of load for
data transaction. YVP110 has 12 View objects for
Transducer block and four View objects for each
Resource block, AO block and DI1 and DI2 function
block, and each View object has the parameters
listed in Table 9.8 to 9.15.
Table 9.7 Purpose of Each View Object
Description
VIEW_1 Set of dynamic parameters required by
operator for plant operation. (PV, SV, OUT,
Mode etc.)
VIEW_2 Set of static parameters which need to be
shown to plant operator at once. (Range etc.)
VIEW_3 Set of all the dynamic parameters.
VIEW_4 Set of static parameters for configuration or
maintenance.