DIO problem

4 posts / 0 new

Sun, 10/13/2019 - 05:57

JAIMEMAN

DIO problem

Could you explain me why, when I set a DO with the stament also in Excel VB or LabVIEW. I can active a relay with High but no black it setting the DO to low.

Then I use the labjack panel test and do the same action and it works normaly. That means I can active and desactive the relay setting the DO High or Low

Mon, 10/14/2019 - 12:32

LabJack Support

Which DO are you trying to

Which DO are you trying to set, and what does your Excel code to set the DO low look like?

Mon, 10/14/2019 - 15:19

LabJack Support

It looks like this topic with

It looks like this topic with you is related:

https://labjack.com/forums/u6/desactive-realy

You'll want to use its responses regarding relay troubleshooting.

Going by the code there, you are setting FIO0 to high/low. First, make sure before setting FIO0 that the line is configured as digital I/O:

' Configure only FIO0 as digital I/O.
lngError = ePut(lngHandle, LJ_ioPIN_CONFIGURATION_RESET, 0, 0, 1)
If lngError <> 0 Then Err.Raise lngError

Also, do error checking with your GoOne calls to make sure you are not ignoring errors:

lngError = AddRequest(lngHandle, LJ_ioPUT_DIGITAL_BIT, 0, 0, 0, 0)
If lngError <> 0 Then Err.Raise lngError
lngError = GoOne(lngHandle)
If lngError <> 0 Then Err.Raise lngError

Without the relays you will want to test your code and make sure the DO are outputting correctly. You can use a voltmeter, or connect to and read though another digital I/O such as FIO1.

Mon, 10/14/2019 - 15:36

swbarlow

JAIMEMAN,

I too am using a U6 (pro) with a RB12 Relay Board (which I recommend), almost maxed out on relays (all mechanical). I have it switching via some .Net programming , just VB.net on schedules etc. Please make sure to follow what these guys are saying. Been in operation for 6 years without a glitch.