TableName.EventEnd (End Data Table Storage Event)

The TableName.EventEnd syntax is used to determine when a data storage event ends for a DataTable.

Syntax

TableName.EventEnd(1,1)

This program uses the TableName.EventEnd syntax to determine when a data storage event has reached completion. Three type T thermocouples are measured. The trigger for the start of a data event is when TC(1) exceeds 30 degrees C, after which the stop trigger is set immediately true.


Public EventEnded as Boolean

Public RefTemp            'Declare the variable for ref temperature
Public TC(3)              'Declare the variable for TC measurements

Units RefTemp=degC       
Units TC=degC

DataTable (Evnt,1,125)
  DataInterval(0,0,msec,10)     'Set the sample interval equal to the scan
  DataEvent(20,TC(1)>30,-1,100) '20 records before TC(1)>30,
  '100 records after TC(1)>30
  Sample(1,RefTemp,IEEE4)       'Sample the reference temperature
  Sample(3,TC,IEEE4)            'Sample the 5 thermocouple temperatures
EndTable

BeginProg
  Scan(500,mSec,0,0)
   
    PanelTemp(RefTemp,4000)
    TCDiff (TC,3,mv34,1,TypeT,RefTemp,True,0,4000,1.0,0)

    CallTable Evnt       
    EventEnded = Evnt.EventEnd(1,1)

  NextScan
EndProg

Remarks

TableName.EventEnd can only be used for a DataTable that uses the DataEvent instruction. The name of the event-driven table is inserted in place of TableName. TableName is limited to 20 characters. TableName.EventEnd = -1 (true) during a scan when the last record of the data storage event occurs and = 0 (false) during all other scans.

For additional data table access functionality, see Data Table Access.