VreesR01 Posted March 16, 2009 Share Posted March 16, 2009 Hello, I am working with labjack U12 with DAQ factory Express release 5.40 I want to measure time between the rising ege of digital input IO0 and IO1 Channel IO0 is called start and Channel IO1 is called stop On both channels I create a channel event like this If (start[0] && ! start [1]) global starttime = systime endif Lateron ik wil substract the values to get the time between the edges This is the problem: When I startup the program I receive error C.1086 "one of the parameters was empty line 1". When I give a rising edge on channel start ,the systime is copied into global starttime ; and the error message C.1086 is gone , the copying in the channel event works only once. I like to do several measurements What am I doing wrong?? Link to comment Share on other sites More sharing options...
AzeoTech Posted March 16, 2009 Share Posted March 16, 2009 A number of things I'm afraid. Your syntax and logic is a bit off: 1) this one doesn't completely matter except aesthetics: too many random spaces in the first line: If (start[0] && ! start [1]) should be if (start[0] && !start[1]) 2) systime is a function, not a variable, so its systime() 3) you assign systime() to a global, but you have this event in two different channels and if they are the same code, you need to have two different globals. Also, you'd need to change start to match the channel That's actually it. It should work then. You get the initial error message because start[1] doesn't exist when the first data point comes in. Only start[0] exists. The next iteration it does, so its nothing to worry about. Link to comment Share on other sites More sharing options...
VreesR01 Posted March 24, 2009 Author Share Posted March 24, 2009 Ok Link to comment Share on other sites More sharing options...
AzeoTech Posted March 24, 2009 Share Posted March 24, 2009 What release of DAQFactory are you running? (go to help-about) You may need to upgrade to the latest by either going to www.azeotech.com or www.daqexpress.com if you are using Express. If you are already running a recent release, I'll need to see your .ctl doc to see what you have done. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.