Problem led to keep
Hello
I'm on it, I'm like 2 months when I started learning on my own account, by now, I create a software in Labview to move 3 engines, just that I had a problem, I tried using 2 round LEDs for each axis (a when the engine is moving in the positive direction) and the other on the negative.
So I have like 6 LEDs, now, the real problem started when I need to keep the LEDs on, I mean for example I push on the positive X the light and in a few milliseconds, it turns off. But what I need, is that if I press a button the corresponding LED should keep on until I pushed the other.
I added the part of the game when I try to add this feature, can hope someone can explain to me a little or even help me to what I do.
Thanks for any help
Your query is really a matter of LabVIEW and would get more response if validated for the jury of LabVIEW. It is not a matter of circuit design and this advice gets much less activity than the LV Board.
The key is the shift register to keep the values of one iteration to another.
You will need a change of register for each LED. If you don't want 6 registers at offset, you could combine the data in a table or a cluster so that a shift register would be sufficient. Since you are a beginner with LabVIEW, I suggest that the separate passage records until you are more comfortable with LV
Since the two entries (buttons) and outputs (LEDs) are boolean, it makes sense to keep the data as boolean overall.
The labels on the block diagram display makes it much easier to keep track of what terminal is connected to what button or LED.
Connecting to the switch case structure you should use integer data types rather than floats. In your VI it does not matter, but if you were to calculate the result with a division or other functions round forced to integers internally in the structure of the case could cause problems.
Consider the use of the Structure of the event to meet the changes in the buttons. According to me, which was introduced to LV before your version 7.1.
Here's a way to do what I think you want. I post a picture because I can't save in version 7.1. Note that I suggest do a Subvi repeated code. By making a Subvi, you just change it one place if you find a bug, or changing requirements. The code has 6 copies, which would need to be changed. I did not remove your code so that I can compare the results.
Lynn
Tags: NI Software
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I get the following:select spat_area_name as "Zone", spat_accl_name as "Accl.", spat_class||'.'||spat_number||'.'||spat_pt as "Elément", spat_type as "Type", max(decode(comp_type,'R',comp_day)) as "Date R", max(decode(comp_type,'R',comp_value)) KEEP (DENSE_RANK FIRST ORDER BY comp_day desc) as "Valeur R", max(decode(comp_type,'V',comp_day)) as "Date V", max(decode(comp_type,'V',comp_value)) KEEP (DENSE_RANK FIRST ORDER BY comp_day desc) as "Valeur V", max(decode(comp_type,'T',comp_day)) as "Date T", max(decode(comp_type,'T',comp_value)) KEEP (DENSE_RANK FIRST ORDER BY comp_day desc) as "Valeur T", max(decode(comp_type,'L',comp_day)) as "Date L", max(decode(comp_type,'L',comp_value)) KEEP (DENSE_RANK FIRST ORDER BY comp_day desc) as "Valeur L", spat_id as "Id." from spat_points inner join comp_deviations b1 on b1.comp_spat_id = spat_id where spat_accl_name = 'TC49' group by spat_area_name, spat_accl_name, spat_cumul, spat_class||'.'||spat_number||'.'||spat_pt, spat_id, spat_type order by spat_area_name, spat_accl_name, spat_cumul, spat_class||'.'||spat_number||'.'||spat_pt
Should I get a value for each date.Zone Accl. Elément Type Date R Valeur R Date V Valeur V Date T Valeur T Date L Valeur L Id. TRF3 TC49 GRTLD.412405.E T 10/13/2004 00:00:00 .00094 10/13/2004 00:00:00 -1.58205 10/13/2004 00:00:00 .00024 251063 TRF3 TC49 RTLD.412405.E B 06/13/2008 00:00:00 02/25/2011 00:00:00 .00016 03/22/2010 00:00:00 255722 TRF3 TC49 RTLD.412405.E S 06/13/2008 00:00:00 02/25/2011 00:00:00 .00016 03/22/2010 00:00:00 06/13/2008 00:00:00 502879 TRF3 TC49 RTLD.412405.S S 06/13/2008 00:00:00 02/25/2011 00:00:00 .0002 03/22/2010 00:00:00 06/13/2008 00:00:00 502838 TRF3 TC49 GRTLD.412405.S T 10/13/2004 00:00:00 -.00005 10/13/2004 00:00:00 -1.58373 10/13/2004 00:00:00 .0006 216066 TRF3 TC49 RTLD.412405.S B 06/13/2008 00:00:00 02/25/2011 00:00:00 .0002 03/22/2010 00:00:00 285703 TRF3 TC49 GRTLD.412412.E T 10/13/2004 00:00:00 .00189 10/13/2004 00:00:00 -1.58375 10/13/2004 00:00:00 .00097 256014 TRF3 TC49 RTLD.412412.E B 06/13/2008 00:00:00 02/25/2011 00:00:00 .00017 03/22/2010 00:00:00 255804 TRF3 TC49 RTLD.412412.E S 06/13/2008 00:00:00 02/25/2011 00:00:00 .00017 03/22/2010 00:00:00 06/13/2008 00:00:00 507820 TRF3 TC49 RTLD.412412.S S 06/13/2008 00:00:00 02/25/2011 00:00:00 .00012 03/22/2010 00:00:00 06/13/2008 00:00:00 512899 TRF3 TC49 GRTLD.412412.S T 10/13/2004 00:00:00 .00043 10/13/2004 00:00:00 -1.58288 10/13/2004 00:00:00 -.00002 256047 TRF3 TC49 RTLD.412412.S B 06/13/2008 00:00:00 02/25/2011 00:00:00 .00012 03/22/2010 00:00:00 254705
The problem is that it seems DENSE_RANK car on the point type.
In fact, I need the same result as this query:
select spat_area_name as "Zone", spat_accl_name as "Accl.", spat_class||'.'||spat_number||'.'||spat_pt as "Elément", spat_type, (select max(comp_day) from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_type = 'R') as "Date R", (select comp_value from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_day = ( select max(comp_day) from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_type = 'R' ) and c1.comp_type = 'R') as "Valeur R", (select max(comp_day) from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_type = 'V') as "Date V", (select comp_value from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_day = ( select max(comp_day) from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_type = 'V' ) and c1.comp_type = 'V') as "Valeur V", (select max(comp_day) from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_type = 'T') as "Date T", (select comp_value from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_day = ( select max(comp_day) from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_type = 'T' ) and c1.comp_type = 'T') as "Valeur T", (select max(comp_day) from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_type = 'L') as "Date L", (select comp_value from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_day = ( select max(comp_day) from comp_deviations c1 where c1.comp_spat_id = b1.comp_spat_id and c1.comp_type = 'L' ) and c1.comp_type = 'L') as "Valeur L", spat_id as "Id." from spat_points inner join comp_deviations b1 on b1.comp_spat_id = spat_id where spat_accl_name = 'TC49' group by spat_area_name, spat_accl_name, spat_cumul, spat_class||'.'||spat_number||'.'||spat_pt, spat_id, comp_spat_id, spat_type order by spat_area_name, spat_accl_name, spat_cumul, spat_class||'.'||spat_number||'.'||spat_pt
I can't find how to change the DENSE_RANK so that it works as expected.Zone Accl. Elément Type Date R Valeur R Date V Valeur V Date T Valeur T Date L Valeur L Id. TRF3 TC49 GRTLD.412405.E T 10/13/2004 00:00:00 .00094 10/13/2004 00:00:00 -1.58205 10/13/2004 00:00:00 .00024 251063 TRF3 TC49 RTLD.412405.E B 06/13/2008 00:00:00 -.00055 02/25/2011 00:00:00 .00016 03/22/2010 00:00:00 -.00008 255722 TRF3 TC49 RTLD.412405.E S 06/13/2008 00:00:00 -.00058 02/25/2011 00:00:00 .00016 03/22/2010 00:00:00 -.00008 06/13/2008 00:00:00 .00068 502879 TRF3 TC49 RTLD.412405.S S 06/13/2008 00:00:00 -.00026 02/25/2011 00:00:00 .0002 03/22/2010 00:00:00 -.00008 06/13/2008 00:00:00 .00059 502838 TRF3 TC49 GRTLD.412405.S T 10/13/2004 00:00:00 -.00005 10/13/2004 00:00:00 -1.58373 10/13/2004 00:00:00 .0006 216066 TRF3 TC49 RTLD.412405.S B 06/13/2008 00:00:00 -.00021 02/25/2011 00:00:00 .0002 03/22/2010 00:00:00 -.00008 285703 TRF3 TC49 GRTLD.412412.E T 10/13/2004 00:00:00 .00189 10/13/2004 00:00:00 -1.58375 10/13/2004 00:00:00 .00097 256014 TRF3 TC49 RTLD.412412.E B 06/13/2008 00:00:00 -.00033 02/25/2011 00:00:00 .00017 03/22/2010 00:00:00 -.00015 255804 TRF3 TC49 RTLD.412412.E S 06/13/2008 00:00:00 -.00036 02/25/2011 00:00:00 .00017 03/22/2010 00:00:00 -.00015 06/13/2008 00:00:00 -.00183 507820 TRF3 TC49 RTLD.412412.S S 06/13/2008 00:00:00 0 02/25/2011 00:00:00 .00012 03/22/2010 00:00:00 -.00015 06/13/2008 00:00:00 -.00177 512899 TRF3 TC49 GRTLD.412412.S T 10/13/2004 00:00:00 .00043 10/13/2004 00:00:00 -1.58288 10/13/2004 00:00:00 -.00002 256047 TRF3 TC49 RTLD.412412.S B 06/13/2008 00:00:00 .00006 02/25/2011 00:00:00 .00012 03/22/2010 00:00:00 -.00015 254705
Or maybe you have a better solution, then using DENSE_RANK?
Thank you.
Yann.Hello
I'm glad you solved!
Are you sure the query you posted is to produce the desired results? You do not use rownb anywhere once you calculate it.
What are you trying to do here? You try to view the most recent date and the value that is related to it, for each combination of several values (spat_area_name, spat_accl_name,..., comp_type)? If Yes, you need something like "WHERE rownb = 1" in the main query, to make sure that you are only the most recent of which, and the PARTITION BY clause from the ROW_NUMBER function must define what is in each groupo (in other words, it must include all the expressions that are in the GROUP BY clause from the main query (, as well as comp_type).Yann39 wrote:
I have seen you replaced my decode with instructions box , is there a reason (performance?).There are situations where the CASE is much faster than DECODE to achieve the same results, but this isn't one of those situations. I (and, I think, most of the people) find easier to understand, debug and maintain CASES. If you and one who will be maintaining this code, prefer to DECODE, then there is nothing wrong with using it in this query. This is a little shorter.
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