How to adjust a function generator on-the-fly in Labview 7.0

I'm using the 'Simulate Signal' vi in LabView 7.0 (with BNC-2090 board) to generate a triangle wave for output to a potentiostat. If the value of either the high or low potential is changed, however, the signal incorporates discontinuities as it recalculates the amplitude and offset. Does anyone know of a way to recalculate the phase shift on-the-fly so that those discontinuities and sudden jumps in signal no longer appear? I think there should be a way to do it using an array, but the 'simulate signal' vi seems like it would be much easier to use.

I agree with Evan that this is not an easy task.
A PID loop could help with the discontinuity but hurt other things. Here are my thoughts.
PID at output of "Simulate Signal"
This would smooth the transition but would also round-off the max and mins. Probably not good.
PID to control Amplitude and offset
Once you have this tuned, it may do what you want if you can tolerate the delay.
Filtering
Here you have to tolerate some phase shift as in the above. You are also caught in a catch 22 because you do not want the dicntinuity when the settings change but meanwhile the triagle wave is an endless series of cusps.
Let us know what ends up working for you.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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Elvis: Is It possible to use the Function Generator and the Oscilloscope simultaneously?

Hi,
We are using the NI Elvis to output a function or a sine wave at a certain frequency and using the oscilloscope on the same board/elvis to read a modified signal. Is this possible? Can we use both the Function Generator and the oscilloscope at the same time? Please help. The oscilloscope would be reading signal from an accelerometer. Thank you in advance. We have no VI as we do not know which to use and if they are possible.

Hi,
There is no problem using the Function Generator and Oscilloscope
at the same time with NI ELVIS. Using the NI ELVIS soft front panels (Start
>> Programs >> National Instruments >> NI ELVIS 3.0 >>
NI ELVIS – see picture attached –‘NI ELVIS soft front panels.JPG’), you can choose
to open more than one instrument at a time. We do this by opening one
instrument, allowing it to begin, and then opening another. We can also program
in LabVIEW using more than one instrument at a time by placing down multiple
Express VI’s taken from the NI ELVIS pallet on the block diagram (see picture
attached – ‘ELVIS Express VI's (LabVIEW).JPG’). One note when doing this,
please see KB 41ODPHX1
for an example of how to program in parallel. If you do not wire the ‘stop’
terminal of the express VI’s, you will get the error described.
David L.
Systems Engineering
National Instruments
Attachments:
ELVIS Express VI's (LabVIEW).JPG ‏74 KB
NI ELVIS soft front panels.JPG ‏56 KB

How to write a function generator

How to write a function generator from labview and using PCI-MIO-16

Hallo, [email protected],
Du (x) meintest am 27.07.01 zum Thema How to write a function generator:
> How to write a function generator from labview and using PCI-MIO-16
Look to the examples - there are many VIs with that function.
Viele Gruesse!
Helmut

How can I backup archivelog generated in the last 5 minutes ?

Version: 11.2.0.3
Platform : RHEL 6.2
How can I backup archivelog generated in the last 5 minutes ? Following is what I've attempted so far ?
RMAN> backup archivelog all format '/rman_backups/Nov21Bkp/archiveTest_%U' UNTIL TIME 'sysdate-5/1440';
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01009: syntax error: found "until": expecting one of: "archivelog, auxiliary, backupset, backup, channel, controlfilecopy, copy, current, database, datafilecopy, datafile, db_recovery_file_dest, delete, diskratio, filesperset, force, format, from, include, keep, maxsetsize, noexclude, nokeep, not, plus, pool, recovery, reuse, section, skip readonly, skip, spfile, tablespace, tag, to, comma, (, ;"
RMAN-01007: at line 1 column 81 file: standard input
RMAN> backup archivelog all UNTIL TIME 'sysdate-5/1440' format '/rman_backups/Nov21Bkp/archiveTest_%U';
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01009: syntax error: found "until": expecting one of: "archivelog, auxiliary, backupset, backup, channel, controlfilecopy, copy, current, database, datafilecopy, datafile, db_recovery_file_dest, delete, diskratio, filesperset, force, format, from, include, keep, maxsetsize, noexclude, nokeep, not, plus, pool, recovery, reuse, section, skip readonly, skip, spfile, tablespace, tag, to, (, ;"
RMAN-01007: at line 1 column 23 file: standard input

HemantKChitale wrote:
You shouldn't specify both "ALL" and "FROM/UNTIL TIME"
Also if you want the archivelogs generated in the last 5 minutes, you should be using FROM TIME.
If you want the archivelogs generated until 5minutes ago (and not the latest archivelogs), you should be using UNTIL TIME.
Hemant K Chitale
I've wondered about the utility of the FROM and UNTIL options for backup of archivelogs. If one is going to back them up, why would one use an option that distinctly introduces the possibility of having gaps - un-backed-up archivelogs? Why would one not simply back up all archives not previously backed up at least once?
I'm sure you'll give me a valid response for a situation for which my imagination fails to see.

How to find which function module write the relevant idoctype?

Dear All,
how to find which function module write the relevant idoctype?

Hi,
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for example : For IDOC type ORDERS
the inbound function module will be IDOC_INPUT_ORDERS and for outbound IDOC_OUTPUT_ORDERSP
In this way you can find the function module for a particular IDOC
P.S: Hope this is what you have asked for
Regards
Sarves

Oracle Trigger - How can I capture and correct on the fly ORA-01847

Oracle Trigger - How can I capture and correct on the fly ORA-01847 day of month must be between 1.
I have a table that has a date column. Sometimes an invalid date is passed and I'd like to capture and initilize the incoming value to null and have it inserted without error. Currently I get ORA-01847 day of month must be between 1.
Example:
create table ep1
col_1 number,
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insert into ep1 values('1', '41-JAN-13')
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Here is the question on experts exchange. I'm told there is no way, but there must be. After all the exception is on a DB system level and I would think one could extend or override these, or disable them.
http://www.experts-exchange.com/Database/Oracle/PL_SQL/Q_23045306.html

SQL> declare
2     wrong_month      exception;
3     pragma exception_init (wrong_month, -1843);
4 begin
5    begin
6      insert into emp (empno, hiredate)
7      values (2345,to_date('13/25/81','MM/DD/YY'));
8    exception
9      when wrong_month then
10      dbms_output.put_line('I caught the bad month');
11      insert into emp (empno, hiredate)
12      values (2345,null);
13    end;
14 end;
15 /
I caught the bad month
PL/SQL procedure successfully completed.
SQL>
SQL> select * from emp
2 where empno = 2345;
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
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How to delete lock entries generated by the function module "BAPI_OBJCL_CHANGE"

Hi experts,
I'm now trying to make an add-on program
which updates material master information by the background job.
To update the "Classification" view of material master,
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Contrary to my intention,
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To shoot this trouble, I read some SCN discussions below:
<<lock unlock record>>
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<<BAPI_OBJCL_CHANGE Lock Error !>>
⇒ I cannot call the function module "BAPI_OBJCL_CHANGE" with "IN UPDATE TASK" option
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I quess/hope you want to remove locks in you caller program and not locks required by the update task processing to insure database consistencies...
Did you use the WAIT option in the commit FM, else if there are no other locks in your called program a call of FM DEQUEUE_ALL could solve your problem.
Regards,
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How to use Mail functionality OPTT in the Schema

Dear All,
We have a requirement where we need to send a mail to the Time Administrator if Time Evalution ends in Error. We have implemented the functionality OPTT MAIL option in the schema, but it is not sending the mail to Time Administrator. We have maintained the Time Administrator table T526 with the SAP ID.
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Rajesh.S

Hello Folks,
Can anyone please let me know How to send a mail notification to the Time Administrator.
In the Schema, OPTT MAIL 1 has declared.
The Time Administrator is maintained in T526 table.
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Kindly let me know.
Note. The COLER function is not used in the Schema.

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kh

Doesn't always work the way you think it should but you could try dropping the Broadcast Safe filter on the entire clip.
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rh

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Hi,sirs,
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I hope to use "while" frame to implement "step add":
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Can you give me a simple program for that? I am using Labview 6.0.
Thanks a lot.

Here's a slightly different version. In this one, you can specify the minimum and maximum count values, the starting count, start count direction, and even have different values for incrementing and decrementing. There is also a Pause and a reset control.
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Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.
Attachments:
Up-Down_Counter_(DBL).vi ‏61 KB

How to execute a function and return the result into a bind variable

Hi,
I am trying to calculate the sum of salaries of all persons with a particular JOB_ID using a function TOTAL_INCOME(v_job_id).
create or replace function total_income
+(v_job_id IN varchar2)+
RETURN number IS
v_total number(6);
cursor get_sal is
select salary from employees
where job_id = v_job_id;
BEGIN
v_total := 0;
for emp in get_sal
loop
v_total := v_total emp.salary;+
end loop;
dbms_output.put_line('Total salary of '||v_job_id||' is: '|| v_total);
return v_total;
END;
Now I woud like to execute this function and assign the returned value into a bind variable test_sal
variable test_sal number(6)
SELECT total_income('AD_VP') into :test_sal FROM DUAL;
dbms_output.put_line('Total Sal:'||:test_sal);
This is returning the below errors:
SELECT total_income('AD_VP') into :test_sal FROM DUAL
*+
Error at line 0
ORA-01036: illegal variable name/number
dbms_output.put_line('Total Sal:'||:test_sal);
Error at line 3
ORA-00900: invalid SQL statement
Could someone help me what could be the problem?? Thanks for your time...

Dear,
If everything you will do will be done inside PL/SQL (stored procedure or stored function) then you don't have to care about bind variable.
When using PL/SQL (static SQL) you will never encounter issues related to bind variables. PL/SQL itself takes care of your code and uses bind variables behind the scene.
The only situation where you have to look carefully to the use of bind variables within PL/SQL is when you use Dynamic sql into stored procedures or functions.
So, see in the light of the above comment, if you have to care about returning your function into a bind variable?
Best regards
Mohamed Houri

How to create a function to get the 16th of the current month and the 15th of the next month

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Example:
If an employee takes a sick leave from 16 feb 2015 to 17 feb 2015 , I want it to affect march's payroll not February.
Please help and thanks in advance.

Below statement gives you the result. Use the concept and write your PL/SQL function.
select TO_DATE('16-'||TO_CHAR(SYSDATE, 'MON-RRRR')), TO_DATE('15-'||TO_CHAR(add_months(SYSDATE, 1), 'MON-RRRR')) from dual;
Or you can use same construct directly in the fast formula by changing syntax accordingly.
Regards,
Peddi.

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I am using liquid data for retreiving data from database which I am able to do
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I am usig following weblogic workshop 8.1 tags in my jsp :
<lds:query name="bdemo_cust_info" server="t3://localhost:7001">
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Thaks and Regards,
Ajay Jindal

hi Ajay
You can create a Liquid Data Control and display it using NetUI - or see the QueryClient
example in weblogic\samples\liquiddata\ejbAPI and create an XML Bean from the
result.
- Mike
"ajayjidal" <[email protected]> wrote:
>
I am using liquid data for retreiving data from database which I am able
to do
but the problem is that it generates the xml on the fly and prints the
response
in xml format in html document .My need is that I want to parse this
xml and use
the data on need basis in my jsp document.
I am usig following weblogic workshop 8.1 tags in my jsp :
<lds:query name="bdemo_cust_info" server="t3://localhost:7001">
<lds:param name="cust_name" value="<%=\"MCD\"%>"/>
</lds:query>;
Please help??
Thaks and Regards,
Ajay Jindal

How do I create an object on the fly

Hello there,
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yours in anticipation
seaview

If I understood you right, you are thinking far too complicated.
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public void actionPerformed(ActionEvent e){
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Adjust video playback brightness on-the-fly...?

I've just moved over from a 5G iPod to an iPhone, and had a question about a certain aspect of video playback...
I watch a lot of video on my iPod (now iPhone), and I'm a stickler for saving my battery life, so I always turn the screen brightness right down to its lowest viewable point when watching video.
I also watch video in bed, with the lights off, so turning the brightness right down still makes the videos perfectly viewable.
Sometime though, of course, I have to turn the brightness up for scenarios where I'm in a brighter environment.
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The only way to adjust brightness is, while watching a video, to go to Home > Settings > Brightness > Drag it > Home > iPod > Video.
Surely everyone can see that's a MUCH more laborious way of doing things!?
Even then, you can't be sure you got the brightness setting adjusted correctly, because a bright vivid animation, like The Simpsons, is much more visible and clear on a low brightness setting than, say, TV shows of Magnum P.I. with their 80's "converted-from-video" feel.
And believe me, I know, because those 2 examples are real-world scenarios for me.
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Is there no method of changing video playback brightness on-the-fly, while the video is still playing on-screen?

Brett,
You've been around on these forums long enough to understand what is and isn't allowed by the TOA, so I'm fairly sure you know (I don't know but could make a guess as well).
In general this whole thread could be deleted... except that you asked a question at the very end of your first post (which was answered). That's all these forums are for, asking and getting questions answered. Editorial comments, rants and raves are not what we are here for.

How to adjust a function generator on-the-fly in Labview 7.0

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