Lockie

Hi 

I am trying to create a graph that begins at zero at a zero time stamp.  However when I change the graph x expression (in graph properties) from "time" to anything referencing "systime()" the trace disappears.

My approach was to use the start time from a button that runs the below code:

global expStartTime1 = systime() // Test Phase Timer
global expStopTime1 = 0
global GraphTime = Time()

and create a graph using the x expression "systime()-expStartTime1" (with bottom axis set to time and date).  I have tried heaps of things but it appears that when systime() is used I lose the data?

Any help would be really appreciated.

Hi 

I am struggling to log (and graph) a number of global variables that have been calculated in sequences.  Have got the graphing working but it wont log the data for me.  I have logging set up for raw data from inputs and am wanting to log the global variables for a few hours at a time so from what I can see logging may be better suited than  export sets.  

I have created a test channel for each variable I want to log (and graph) as below:

I then have a sequence running to make the variable a string in the channel

While (1)
      
      Graph_DT_Flow.AddValue(insertTime(DT_Flow,systime(),0))      
     
      Graph_kW.AddValue(insertTime(kW,systime(),0))    
     
      delay(1)
      
   endwhile

This allows me to graph the channels which is working but when I try to log them the column when opened in excel only has the heading.

If you could help with this it would be amazing!!

Legend! that's bang on.

+ Good work on DAQ Factory... Great product

FYI - For reference for anyone in the forum looking to do a similar thing - Have added some bits to name the data logging file + added an extra timer to display total test time:

In a button quick sequence:

// Starts Timer and starts Data logging

if (Timer2Running != 1)  
  global expStartTime2 = systime() // Total Test Timer
  global expStopTime2 = 0
  global Timer2Running = 1
endif

global expStartTime1 = systime() // Test Phase Timer
global expStopTime1 = 0

if (logging.Data1.running) 
   endlogging(Data1)
 
   delay(1)
   
   logging.Data1.strFileName = "file path" + formatdatetime("%y_%m_%d@%H_%M",systime()) + ".csv" //add folder address into file path where ya want it saved.
   beginlogging(Data1)

else 
  
 logging.Data1.strFileName = "C:\Users\rs\Desktop\Calirometer Room\Test Data\CM1_" + formatdatetime("%y_%m_%d@%H_%M",systime()) + ".csv" 
   beginlogging(Data1) 
   
endif

Stop timer button quick sequence:

//Stops Timer & Data Logging Data1

expStopTime1 = systime()
endLogging(Data1)   

Second stop timer button quick sequence:

//Stops Timer & Data Logging Data1

expStopTime2 = systime()
endLogging(Data1)   

Timer2Running = 0 // resets bit to allowed timer to be started

Hi, 

I am new to Daqfactory and fairly new to labjack (T7) which is being used.  I am struggling to set up a visual timer that can be started and stopped with a button and will visually display time lapsed time in hours, minutes and seconds.  Ultimately I also want data logging to be stopped and started at the same time.

Any guidance or examples on how this is best achieved would be amazing!

Thanks