SCB 68

[surya]

We are using labview (version 5.0). I have few questions.
1) I have a SCB-68, connected to another PC (first PC is connected with AMUX-64T), which I'm using to trigger the in-cylinder pressure (high frequency) with a external scan clock, which has a "Crank angle encoder" as source.(pulse per every 1/2 CA =720 pulses/rev).
Index pulse (Digital trigger for TDC) is connected to PFI0
External Scanclock source is connected to PFI7.
As the encoder and digital trigger are connected to two pins (PFI7 and PFI0 respv.). Will I be able to connect the speed pick-up sensor, also to the same SCB-68, (if so what are the available pins numbers, do I have to use to connect the gate source for my speed pick-up).

2) Can I use the crankangle encoder only to measure the sp
eed of the engine? if so how?. Im already using the crakangle encoder in "acquireNscans-externalscanclkD.vi.". Can I use it for two different applications?


3) If I have to get another SCB-68, will I be able to connect that in series with AMUX-64T, so that I can get the readings in first PC, only.


Thanks for your time,
Surya."

[Filipe A.]

Hello;

Your answers:

1) I'm assuming you configured the Analog Input task as dig triggered with External Scan clock, and have the Analog input task starting at the event of the first digital pulse coming to PFI0, acquiring one Scan of data at each pulse coming to PFI7. You can still use one of the counters of the DAQ board, if your device has any (you also didn't mention what DAQ device you are using), to catch the encoder pulses.

2) I don't see why you couldn't use the same pulse train in two different tasks. You could use the encoder with one of the counters of your DAQ device, make the counter to go to the counter gate input, and configure the counter as buffered event counter.

3) Both SCB-68 and AMUX-64T are terminal blocks and can't be cascade
d.

Hope this helps.
Filipe A.
Applications Engineer
National Instruments

[surya]

hi Filipe,
Thanks for ur response,
I have AT-MIO-16 E -10 DAQ board.
Surya.