What is the difference between ArmStart and StartTrigger

[taiqi]

I create CO Pulse Tick task. I find the result of using ArmStart and StartTrigger is same.

So I want to know what the difference between ArmStart and StartTrigger is.

[AdnanZ]

For ArmStart you wait for on two different signals, the arm start trigger and the start trigger itself. Once the arm start trigger signal is received, the counter becomes armed and is ready to start - only the start trigger allows operation to begin. For Start Trigger, you just wait for the start trigger signal to be received. In your case, I believe you must be arming the counter before you call this function, so it looks the same to you.