6 block setting, 1 link object, 2 trend object – Yokogawa Wireless Temperature Transmitter YTA510 User Manual

Page 19: Block setting -6 5.6.1, Link object -6, Trend object -6

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<5. Configuration>

5-6

IM 01C50T02-01E

5.6 Block Setting

Set the parameter for function block VFD.

5.6.1 Link Object

Link object combines the data voluntarily sent

by the function block with VCR. YTA has 26

link objects. A single link object specifies one

combination. Each link object has the parameters

listed in Table 5.6.
Parameters must be changed together for each

VCR because the modifications made to each

parameter may cause inconsistent operation.

Table 5.6

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

Not used in YTA.Set to “0”.

4

ServiceOperation Set one of the following. Set

only one each for link object

for Alert or Trend.

0: Undefined

2: Publisher

3: Subscriber

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. To

avoid the unnecessary

mode transition caused

when the data is not

correctly received by

subscriber, set this

parameter to “2” or more.

26 Link objects are not factory-set.

5.6.2 Trend Object

It is possible to set the parameter so that the

function block automatically transmits Trend. YTA

has ten Trend objects, six of which are used for

Trend in analog mode parameters and four 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 5.8. The first four parameters are the items to

be set.

Table 5.8

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.

Five trend objects are factory-set as shown Table

5.9.

Table 5.9

Trend Object are Factory-Set

Index

Parameters

Factory Settings

32000

to

32005

TREND_FLT.1

to

TREND_FLT.6

Not used.

32006

to

32010

TREND_DIS.1

to

TREND_DIS.4

Not used.

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