ReadHistoricalData

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Manual > Control Reference > Other > Historical data control > Method >

ReadHistoricalData

 

Get historical data.

 

syntax

ReadHistoricalData(

         startTime,

         bIncludeStartTime,

         endTime,

         bIncludeEndTime,

         maxRecord,

         &count,

         &dateTime,

         &data

         )

 

Parameters

 

startTime

Type:

character

The start time for the data you want to retrieve.

 

bIncludeStartTime

Type:

Boolean

Get TRUE hours, including the start time.

 

endTime

Type:

character

The end time for the data you want to retrieve.

 

bIncludeEndTime

Type:

Boolean

Get TRUE hours, including the end time.

 

maxRecord

Type:

Number

The maximum number of records to retrieve.

 

&count

Type:

Number

Variable for storing the number of rows (records) of retrieved data.

 

&dateTime

Type:

time

Variable for storing the time information of the acquired data.

 

&data

Type:

General purpose

Variable for storing the retrieved data.

 

Return Value

Type:

Boolean

FALSE - Failure. TRUE - Success.

 

hmtoggle_plus1Explanation

Get historical data.

 

1) When HDSRequestType is RAWDATA

count is the number of rows (records) of the retrieved data. It is a simple number.

dateTime is a one-dimensional array with the number of rows (number of records). It can be obtained with dateTime[row].

data is a two-dimensional array with the number of columns (fields) x rows (records). It is obtained as data[column, row].

 

2) When HDSRequestType is MULTIRAWDATA

count is a one-dimensional array that is the number of columns (number of fields). It can be obtained by using count[column].

dateTime is a two-dimensional array with the number of columns (fields) x the number of rows (records). It is obtained as dateTime[ column, row].

data is a two-dimensional array with the number of columns (fields) x rows (records). It is obtained as data[column, row].

 

 

reference

 

Connect

DisConnect

AddField

DelField

ClearField

ReadHistoricalData

RequestHistoricalData

GetHistoricalDataServerName

GetHistoricalDataFieldName

GetLastError