Counter slows down when the number of the expected pulses don't arrive
G'Day Everyone,
I'm having a problem with some counter work I'm doing, and can't seem to work out where the problem lies. I'm using a NI-PCI-6602, and I setup the counter, send a couple of DIO lines high (this tells the attached custom electonrics to fire), and then clock the pulses that arrive. I'm looking for four pulses to come back (I set this using "Counter Buffer Config.vi" and look for them with "Counter Read Buffer.vi"), and it works really well when four pulses arrive. Unfortunately, sometimes the instrument may not send all of the four pulses (I occasionally get back 0, 1, 2 or 3 pulses). When this happens, my VI slows down remarkably - when all four are there I get in the order
of 10ms response times, but if one or more are missing it slows down to approximately 1000ms. I've set the "time limit" input of "Counter Read Buffer.vi" to 10ms, but using the (often unpredictable) VI Profile utility, it seems that the hold up is either when I arm or disarm the counter using "Counter Control.vi". I've attached the VIs llb for your interest.
Any help that you can give will be truly appreciated!
cheers,
Christopher
Copyright © 2004-2015 Christopher G. Relf. Some Rights Reserved. This posting is licensed under a Creative Commons Attribution 2.5 License.
Attachments:
CounterIssues.zip 430 KB
Thanks for the help everyone (especially Darren who guided me toward the solution) - the problem was a simple one, but I couldn't see the forest from the bush fires: the project is based on LabVIEW 5.1 (old project, no money - I'm sure you all know the deal!), and so a clean install gave the errors. It turns out that the board (6602) was released after LabVIEW 5.1 (and hence LabVIEW5.1's default NI-DAQ), so a fresh NI-DAQ install corrected any problems...
thanks again!
Christopher
Copyright © 2004-2015 Christopher G. Relf. Some Rights Reserved. This posting is licensed under a Creative Commons Attribution 2.5 License.
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14. This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed. -
Hi, i am looking to set cells so that when one number decreases the other increases. So say cell A is at 5, and cell B is at 0. When Cell A goes to 4, Cell B goe to 1. The catch is that when Cell A gets down to 1, and i change it to 5 again, Cell B will be on 4 and start incresing from that point on when cell A decreses. This is to show an amount of sales within a company when stock is sold.
Example:
A = 3
B = 0
A = 2
B = 1
A = 1
B = 2
A = 3
B = 2
A = 2
B = 3
A = 1
B = 4
A = 3
B = 4
A = 2
B = 5
Sorry if this sounds confusing.
Many Thanks,
OliverCan't be done, in a single cell, for the reasons given by Jerry.
But not difficult in a column:
I've moved the columns one to the right to put them in the body cells of the default Numbers table.
Current stock is listed in column B, with results of increases and decreases entered manually. Any increase is assumed to be a restocking, and does not affect the sales to date figure in column C. Any decrease in stock is regarded as a sale and increases the current total in column C by the amount of the decrease.
Until an entry is made in B, the corresponding cell in B will show a hyphen. This can be changed by changing the text between the quotation marks in the formula.
Enter the formula into C3 and Fill it down the rest of column C.
Regards,
Barry -
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Replacing or even suggesting replacing hardware without doing basic troubleshooting first is not very smart.
If basic troubleshooting does not resolve, take it to Apple for evaluation. There is no obligation to pay for anything, the evaluation is free. -
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Welcome to Apple Support Communities,
The article linked below provides a lot of great information and troubleshooting suggestions that you can use to resolve the unexpected restart issue that you’re seeing when trying to login to your MacBook Air.
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(repeatable, reproducible)
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preceded with a tilde sign)
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