6 block setting, 1 link object, 2 trend object – Yokogawa YVP110 User Manual

Page 55: 3 view object, Block setting -5 9.6.1, Link object -5, Trend object -5, View object -5

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<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.

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