counter output 2V when using gate and source at the same time..

[Stephen74]

I'm using NI TIO-6601.
I connected output of counter_0 to pfi 34 and pfi27 on hardware(CB-68LP).
pfi 34 is used for gate to counter_1 and counter_2.
With this gate, counter_1 and counter_2 generate pulse trains when the gate is in high state.
pfi 27 is used for source to counter_3.
With this source, I'm trying to let counter_3 count event on counter_0.
However, after this connection, the voltage from counter_0 is about 2V measured by Oscilloscope.
Also, counter_3 cannot count the event on counter_0.

Is there any problem on my connection ? or any tips for solving this problem??
Thanks in advance!!

p.s. It works when only two counters are working.
for example, when counter_0 generates pulse tra
in and output is connected to pfi_27, then counter_3 can count the event on counter_0.

Thanks again!

[Bill B]

Hello,

Thank you for contacting National Instruments.

This issue may be related to amount of current the output of counter 0 can produce. You may want to try a different method for making these connections. Try routing your counter 0 output on to RTSI line 1. Then use RTSI1 as the gate for counters 1 and 2 and the source for counter 3. This way, you will not need to use two seperate PFI connections.

If you are using Trad. DAQ and LabVIEW you will need to use the Route Signal.vi. If you are using DAQmx, you will need to use the Export Signal.vi

Regards,
Bill B
Applications Engineer
National Instruments