Externally Control Count Direction with 6501

I have a USB-6501 Digital I/O & Counter card. I have an encoder that outputs a 50% duty cycle digital squarewave for a count, aswell as a digital high, low to indecate the count direction. Under the DAQmx configureation panel there is an option to have a externally controlled count direction. When selected I get an error saying:
Error - 2000777 occurred at DAQ Assistant
Possible Reason(s):
Measurements: Requested value is not a
supported value for this property.
Property: CI.CountEdges.Dir
You Have Requested: Externally Controlled
You Can Select: Count Up
Channel Name: CountEdges
To me this sounds like my USB-6501 does not support this function. If this is ture is there a way I could perform the same task in code? If not what hardware could perform this?
Thanks,
Randon Rose

Hello,
You are correct that your device does not support that functionality. The USB-6501 counter is only usable as an event counter, which means it can only count falling edges of an incoming signal. This counter is usable on only one external terminal, also port 2 line 7.
If you would like to know what you can do with this device check out this link, which is the manual.
Chris W

Similar Messages

Externally controlled counter direction with USB-6211

I am using a USB-6211 and created a simple read counter application with the DAQ Assistant. It counts pulses (1 sample on demand) on Counter 0 (PFI0). When I set Direction to Externally Contolled it does not work properly. It counts random up and down. According to the manual my direction input line is Ctr 0 B (PFI1), but the level of this pin has no effect. What am I doing wrong?

Hello Steffan,
According to the following Knowledge Base you have cannot use the default settings wehn trying to externaly control the direction of the counter:
http://digital.ni.com/public.nsf/allkb/1A8818274130FA388625722E00760CC9?OpenDocument
Since these changes cannot be done in the DAQ assistant you have to use the DAQmx API to resolve this. I have attached a small example that does a simple event count on the source pin of counter 0 (which is also the A input of the counter). With a property node I have set the Counter Direction input terminal to PFI 1 (which is the B input). Now when the PFI 1 is low you will count up, when it is high you will count down.
hope this helps,
Regards,
RikP - National Instruments Applications Engineering
Message Edited by RikP on 06-05-2008 10:12 AM
Rik Prins, CLD
Applications Engineering Specialist Northern Europe, National Instruments
Please tip your answer providers with kudos.
Any attached Code is provided As Is. It has not been tested or validated as a product, for use in a deployed application or system,
or for use in hazardous environments. You assume all risks for use of the Code and use of the Code is subject
to the Sample Code License Terms which can be found at: http://ni.com/samplecodelicense
Attachments:
Count Digital Events Up-Down USB-621x.vi ‏33 KB

Problems with external counter direction

I have a DAQPad-6015 attached to a SC-2345, in slot 19 of the SC-2345 I have a SCC-CTR01. Within MAX I have created a task to retrieve the counter information but because there is no option of a SCC-CTR01 I have configured it as a SCC-FT01. Attached to the "SCR" input of the SCC-CTR01 I have a signal generator and on the test pannel I can see the counter count the edges as I wanted. My next step is to externally control the direction with the "GATE" input on the SCC-CTR01 and have had no luck. I am able to see the TTL signals from the SCC-CTR01 on the green connector stack, I can see the signal generator out on PFI 8 and I can see the "GATE" switch on PFI 9. I am also able to switch the count direction by tieing P0.6 to 5 volts when in the mode of "Count Direction, Externally Controlled" is selected. I am not able to connect PFI9 to P0.6 as there appears to be another output tied to P0.6. Where do I go from here?
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Thanks-
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National Instruments

Guide to External Jobs on 10g with dbms_scheduler e.g. scripts,batch files

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This guide covers several common questions and problems encountered when using
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In 11g and up the error number returned by the job is additionally recorded in
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Windows-specific Issues
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Hi Ravi,
Can you help me...
Hi All,
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an_220108.dmp log=/u02/rmanback/rman_220108.log owner=rman statistics=none comp
ress=n buffer=400000
compress *.dmp
exit
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BEGIN
DBMS_SCHEDULER.CREATE_SCHEDULE(
schedule_name => 'rman_backup_schedule',
start_date => SYSTIMESTAMP,
end_date => '31-DEC-16 05.00.00 AM',
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BEGIN
DBMS_SCHEDULER.CREATE_JOB (
job_name => 'rman_backup_job',
program_name => 'rman_backup_prg',
schedule_name => 'rman_backup_schedule',
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While I am running the job I am getting the following error anybody help me.
ORA-27369: job of type EXECUTABLE failed with exit code: Not owner
ORA-06512: at "SYS.DBMS_ISCHED", line 150
ORA-06512: at "SYS.DBMS_SCHEDULER", line 441
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If I removed "compress *.dmp" line in rman script it is working fine.
/* additional Info from dba_scheduler_job_run_details as follows */
ORA-27369: job of type EXECUTABLE failed with exit code: Not owner
STANDARD_ERROR="
Export: Release 10.2.0.3.0 - Production on Tue Jan 22 14:30:08 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Release 10.2.0.3.0 - Production
Export"
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Attachments:
Measure Angular Position V5.vi ‏100 KB

I don't have LV at my network PC and can't open your vi now, but can offer this:
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i am using a NI cDAQ 9472 to control the direction of motor with the help of a motor driver L293D by generating a pwm signal. I am able write the code for one direction of the motor, but how to write the code to control both directions of motor
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Am I reading the specs right? Is Adobe discontinuing support for external control in the new release????? If this is true, it is VERY DISAPOINTING as using my Mackie Control is intregral to my workflow. Also, did I read it correctly that there is NO MIDI SUPPORT as well???
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pbrent wrote:
Am I reading the specs right? Is Adobe discontinuing support for external control in the new release????? If this is true, it is VERY DISAPOINTING as using my Mackie Control is intregral to my workflow. Also, did I read it correctly that there is NO MIDI SUPPORT as well???
You seem to be falling into the trap of believing that because something isn't there at present, that its support is discontinued, and that simply isn't true - although it might well be for MIDI. The true situation is is quite simple; It is that there are several things not present in the new release that were present in 3.0.1, but that does not mean that they won't be replaced or upgraded in the future - except perhaps for MIDI, in which Audition would always be playing catch-up, and which isn't strictly neccessary in audio software anyway. As has been stated before, Audition isn't music programming software like Cubase, etc, it's audio software. Music software generally has all sorts of other things in it to clutter it up, and if it's music production you want to do, you are far better off with software dedicated to that task anyway. People apparently have a lot of success using Reaper for multitrack music recording, and using Audition as a dedicated editor for it - which seems perfectly reasonable to me.
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Externally Control Count Direction with 6501

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