PCI 6527/PCI 6602 Hardware resource conflicts

Hello,
I'm running into a problem with my motherboard and a comination of NIDAQ cards. Normally I have all 6 PCI slots filled with various cards, I have narrowed the problem down to some combination of 2-3 cards. I can install a PCI-6527 card and a Commtech-Fastcomm ESCC-PCI card into various combinations of PCI slot positions, some combinations the OS will but just fine. Some combinations the OS will come up and show 50%+ cpu utilization in the Idle Process, attribuated to interrupt handling. When a good combination is found I can then install a PCI-6602 card and the utilzation problem shows back up. I have not iterated through all the combinations of the 3 cards yet to see if there is some combination that works, but it appears there is a resource conflict. I have installed NI-DAQ v 7.4T, and have the latest drivers for the Commtech card. I also have one more ESCC-PCI card that needs to be installed, so this may become more nerve wracking. I do not have the ability in the BIOS to manually set PCI assignments. This is on a fresh install of Windows 2000.
Thanks
Message Edited by agchino on 09-02-2005 03:03 PM

If you already have an application that uses the Tradtional NI-DAQ C
API, you would have to rewrite the code that uses the DAQ function
calls, as DAQmx function calls are quite different. I would
definitely recommend using NI-DAQmx for future applications, however.
If things seem normal with just National Instruments boards installed
and the issue arises when you put in the other boards, I would contact
the vendor of your other boards. As far as setting IRQs in
Windows 2000, I believe Windows does it automatically, and ignores what
the BIOS settings for IRQs are. See the following Knowledge Base.
Aside from this it seems that the boards are working -- interrupts are
obviously needed to communicate to devices but as far as what may be
going on at the process level or how the other boards may be affecting
this is more an operating system issue.
Doug M
Applications Engineer
National Instruments
For those unfamiliar with NBC's The Office, my icon is NOT a picture of me

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Line connection between PCI-6527 card and instrument

Sorry for my foolish. My poor electronic knowledge prevent me from fully understanding what you explained in your last reply and need more help.
In fact, we plan to control two instrument switchs, one is for the Magnetic_Suspension_Control(MSC) , another is for control the Weight-changing-Device(WCD).
The instrument manufacturer provide a cable for the MSC and WCD. The cable looks as follows: there is one connection to the computer(25-pin subD-plug) of which two cables lead away, one to the MSC(6-pin Lemosa)and the other to the WCD(15-pin subD-plug).
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25-pol.SubD; meaning
Pin 9 anode of OC1-LED
Pin 7 anode of OC2-LED
Pin 23 cathode of OC-LED
Pin 18 cathode of OC-LED
Because of the optocouplers draw some current from the NI-card, the manufacturer let me make sure that the NI-card can source circa 7mA(better 10mA) on each pin.
The interface of the WCD consists of three simple TTL-level inputs, which are also directly connected to the 25-pin SubD-plug of our cable as following:
25-pol.SubD; meaning
Pin 4 TTL-Input (remote) (0-1V/3.5-5V)
Pin 3 TTL-Input (weight 1) (0-1V/3.5-5V)
Pin 2 TTL-Input (weight 2)(0-1V/3.5-5V)
Pin 5 common ground
The current drawn by the TTL-inputs is not worth mentioning.
By controling the logic state of these above pin states through labview, I then can control the instrument switch.
Based on above information, how should I choose right resistor for achieving the suitable v
oltage and current on each pin and How should I connect line between PCI-6527 card and 25-pin sub-D plug(I plan to use port 3 of PCI-6527 card).
Thanks, your help is greatly appreciately
zhou

Zhou,
My best recommendation is that you find someone who can give you a better and more direct advise in electronic circuiting. We don't have in our hands the manual of your instrument in order to clarify what it needs and where, although you gave some pin numbers we cannot take the risk of advising something that we don't have the absolute knowledge of. We can give you all the details you want about our card and what does it gives, but you have to decide how are you going to connect it to your instrument. If you recall your email about the manual, in fig. 3-6 page 3-12 you can see a picture of how to connect a TTL driven device, in the last email we gave you an option of how to connect the resistor and where, please read it again, basically I am going to repeat the same, we feel sorry about not been able to give you more help, but is opt to you to find help in electronic theory. Remember in my last email that I told you the 3 cases in which your instrument may need either voltage, current or both, and I told you how RL will change and what new resistors you may need to connect. Review that and make tests with your switch, your question about how to choose the right resistor is answered in the previous email and how to connect lines between the board and the cable of your instrument you have both pin outs... match them... the person who has in his hands the manual and the instrument is the best person to choose how to interfase both appliances... we are sorry Zhou but if we advise you about pin connections of your device with our blindness we have of your device we may make a mistake, we told you about our pins and how to choose resistors.
If you need more direct assistance on this Zhou you may better try to call us, by text messaging is limited and this requires direct guidance. If you decide to call us you can find instructions at www.ni.com/ask hope you move forward in your application as soon as possible.
Nestor Sanchez
Applications Engineer
National Instruments
Nestor
National Instruments

Resistor choose in PCI-6527 card

I think I need more help for PCI-6527 card.
Problem 1: In PCI-6527 user manual,page 3-11, last paragraph about the source current. The instrument require digital I/O card can source current 7mA (better10mA) on each pin for activating switch. The switch is TTL(0-1V/3.5-5V)(Which is all information the instrument provided). If I choose the resistor 5K which is recommended in the manual, the source current will be very small(0.3mA) and can not achieved the current for activating switch(10mA). Is my understanding correct or not? If not, how should I choose right resistor value for my current application?
Problem 2 : for current application, I can use the 5V source board since total current on all channels below 1A. Also I can use gro
und line of board to connect to DIG- pin for reference line.Is it right?
Problem 3: Three pins of instrument cable(25 pin sub-D cable) are required to connect to ground line, could I connect these three pins directly to ground line on board or I have to use additional ground lines.
Thanks
zhou

Zhou,
Answer 1: The formulas for choosing your resistor are there in page 3-11 and 3-12. Your instrument switch is going to be connected to VOUT (DIG+ and DIG-), you have to check your instrument to see if it requires only the 10 mA current for activating or if it requires 5V or if it requires both. In case it requires only 10mA if you perform the formula V=RI, you are going to find that you need a total resistance of 500 ohms, your board already has a 35ohm resistance so you need to connect a 465 ohm resistance in serial but not as RL, in that case RL is just jumper wire (0 ohm) your 465 resistance is in serial connection with the 35R and all of them make VOUT. Just take a note that your switch may be acting as a relay and it may have a coil on it which adds mo
re resistance, so measure the resistance also of your switch and the sum of 35R + your switch coil resistance + your configurable resistance = 500 ohms, this is in case you need 5V and 10mA in the input of your switch. Check this out because switches may need only to be applied a certain current or a certain voltage but not usually both.
Answer 2: If you are using the 5V source of the board for DIG+ you have to use the ground reference of the board also for DIG-... if you are using an external 5V source, then you need DIG- to connect to the external ground.
Answer 3: We don't know what are this three pins for. Your switch must have a + and - inputs, in which you directly connect DIG+ and DIG-, are these GND pins this - inputs ?... if so then yes. If not, then you should what are this GND pins for in your instrument, if they have other functionality most probably you don't have to connect to the board ground, because you are not getting any source from the board, you are only act
ivating the switches, but I cannot guarantee this because I don't know your instrument.
Hope this is helpful for you Zhou, good luck!...
Nestor Sanchez
Applications Engineer
National Instruments
Nestor
National Instruments

Différence carte PCI 6527 185681G-01 et PCI 6527 185681D-01??

Bonjour,
J'ai deux PC l'une avec une carte PCI 6527 185681G-01 et l'autre avec une carte PCI 6527 185681D-01?
Je plug la carte du premier pc, j'allume et cela fonction.
Sur le deuxieme pc, je ne plug pas la carte, j'allume le pc démarre correctement et voit bien la carte.
J'éteins, puis je plug. L'écran reste noir et ne veut pas booter.
Je n'arrive plus a rebooter le PC tant que la carte est dans le PC.
Quels sont les différences entre une cartes PCI 6527 185681G-01 et une carte PCI 6527 185681D-01 qui pourrait justifier le fait d'avoir cramer la seconde carte??
Cordialement.

Bonjour Donny_certia,
Il n'y pas de différence fondamentale entre deux révisions qui pourrait provoquer cela.
Avez-vous fait des tests croisés? Essayez de switcher les pc et les cartes PCI.
Si vous avez d'autres ports PCI, il vous est également possible d'essayer.
Lorsque le pc ne démarre pas, y a t'il au moins la fenêtre du bios qui s'affiche ?
Apres ces tests, vous serez en mesure de voir s'il s'agit de la carte PCI ou du PC.
Si cela vient de la carte, je vous invite à nous contacter pour lancer une procédure de réparation
Cordialement.
Paolo_P
National Instruments France
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PCI 6527/PCI 6602 Hardware resource conflicts

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