How do I write out a word 64-bits by 2 PCI-6534 boards

[trinhduc]

Hello, I am Duc,

I have 2 PCI-6534 boards, using Labview 8.5. How do I can write out a 64-bits binary words to Dev2/port0_32 and Dev1/port0_32. Please give me an example!

Thank you!

[trinhduc]

Maybe my situation is not so clear. I mean I want to control 64 channel by a 64-bit binary word. That mean I have to combine two 32-bit largest scale I/O device (PCI-6534) became a 64 bit I/O device by somehow sychronization.....I am not sure and no detail information in NI-6534 manual. The two 32-bit word as high group bits and low group bits it can not be apply in this case because the command to control is changed via my calculation.

Thank and hope someone to help me solve the problem!!!

Trinh Quang Duc

[M.Chano]

Hello Duc,

Thank you for contacting National Instruments.

Regarding your digital I/O question, have you checked the sample finder for sample programs related to digital I/O? To access the sample finder, go to 「ヘルプ (Help Menu)」 >> 「サンプルを検索 (Search for Examples)」. Example programs are grouped by category. Several can be found by going to 「ハードウェア入力と出力 (Hardware Input and Output」→「DAQmx」→「デジタル生成 (Digital Generation)」。This is probably a good place to get started. I recommend taking a look at "Write Dig Chan.vi" first.

To synchronize two boards, you have several options.

1. Use a RTSI cable to physically connect the two cards and allow them to share a sample clock
2. If you use a BNC terminal or any breakout terminal, have the cards share the same sample clock by wiring the appropriate pins.
3. If you don't need extremely precise timing, use software timing. Which means, whenever the write is called, it performs the output operation for the respective task.
   

Also, a help file exists specifically for the NI-6534 and NI-DAQmx Programming. Please take a look at the link below.
http://digital.ni.com/manuals.nsf/websearch/CCB88DC67022A750862573A7007ACAB7

Let me know if you need further assistance.

Mas Chano
Applications Engineer
National Instruments Japan



このメッセージは　03-20-2008 08:21 PMに M.Chano が編集しています。

[trinhduc]

Mr. M.Chano (Proven Veteran)

I have bought a RTSI cable, installed it, configed it in MAX. And I also read the help file via your link but I dissapoint it is not helpful for me. No instructtion to examples it just like a definition. I also download an example. I will post it in here. It is also error and my I/O board it can not to working properly until I restart my computer. I really don't know how to continue. Please give me an example.

Thank you

Trinh Quang Duc