Encoder Triggered acquisition with motion card RTSI buss

[Alias user name here]

I am looking at using the PCI-7334 Motion card to control a motor, we also need to measure a analog signal via an 18-bit NI DAQ card, triggered to the motor encoder. Can I via the RSTI buss do this? (I know the Motion card has analog - but 12-bit is not enough resolution for us.)

Does the standard set of Motion Drives support this? Do I need the wiz-bang motion drivers?

I would like to avoid wiring the encoder to boths cards to avoid noise/loading problems.


Regards
Jack Hamilton

[Rodj]

Jack,

The NI Motion Controllers have he ability to generate a signal when the encoder matches a specified position. We call these breakpoints or position compares. These signals can be routed via RTSI or the PXI backplane to the DAQ board.

The PCI-733x/4x board support single shot breakpoints. For every breakpoint you enable it in software. The maximum breakpoint frequency is 150 Hz. The PCI-735x board supports periodic and buffered breakpoints. These are enabled by the hardware and support breakpoint frequencies of 4 Mhz and 2 Khz respectively.

Rodger S.

[RManion]

Hi Jack,

If you are going to be using the NI DAQ card, the method Rodger mentioned should be just what you need. In addition to this method, I would just like to point out that the 7350 series of Motion Controllers has a 16 bit A/D converter. This still might not be enough resolution for your particular application, but it is available if you need it!

Robert