How to use a signal of true/false dynamics with a business structure?

Hey everybody-

Is it possible to enter a case structure dynamic data of true/false? We try to generate a waveform and want our structure case to run when the wave exceeds a certain threshold value and freeze execution when it drops below the threshold (If false). However, we want the case structure to run continuous - i.e. If the structure of the deal for the 'real' case running while the waveform is above the threshold, we next want to deal for 'false' structure to run when the wave goes below the threshold, and so on until we stop our program.

Any suggestions would be much appreciated!

Rachel

Remove the loop around your DAQ Assistant vi express (I hate express screws). There is already a big loop around all of the code in the lower part. As has been pointed out by Ravens Fan, don't assign continuous acquisition. Set a finite number of acquisitions. Then the rest of the code can run and the loop can travel again.

Get rid of the stop sign at the top. When the code is finished, Labview will stop on its own.

You have two stop buttons. Only one is necessary. Look at my example posted a few messages back. A STOP with local variables.

Shrink your block diagram. It takes more than one monitor space. It is difficult to read when you have to scroll all over the place.

Tags: NI Software

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Hello gurus,
I have it here is the Emp_Hist table, which is usually audit table for the Emp table.
For each record, we maintain version whenever it updated there.
ENo EName Sal job DOB Version Tstamp
---------- ---------- ---------- ---------- ----------    ---------- ----------------------
1 Sanjiv 1000 committed 12/10/89 1 02/03/12 13:00
1 Sanjiv 1000 committed 12/10/89 2 02/03/12 14:00
1 Sanjeev 1900 committed 12/10/89 3 02/03/12 15:00
2 Scott 2000 analyst 22/10/85 1 02/05/12 13:00
2 Scott 2000 analyst 22/10/85 2 02/05/12 14:00
2 Scott 3000 lead 22/10/85 3 02/05/12 15:00
Smith 4000 lead 13/11/81 1 3 06/02/12 13:00
Smith 5000 lead 13/11/81 2 3 02/06/12 14:00
3 Smith 5500 lead 13/11/81 3 06/02/12 16:00
3 Smith 8000 CTO 13/11/81 5 02/06/12 17:00
4 Tom 4000 lead 13/11/81 1 02/07/12-13:00
4 Tom 5000 lead 13/11/81 2 07/02/12 14:00
4 Tom 5500 lead 13/11/81 3 02/07/12 15:00
Tom 4 8000 CTO 13/11/81 4 02/07/12-16:00
CREATE
TABLE Emp_Hist
(
ENo NUMBER,
EName VARCHAR2 (20).
SAL NUMBER,
Use VARCHAR2 (20).
DATE OF BIRTH,
Version NUMBER,
Tstamp DATE
);
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (1, 'Sanjiv', 1000, 'Clerk', to_date (December 10, 1989 "," DD-MON-RRRR'), 1, to_date (March 2, 2012 13:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (1, 'Sanjiv', 1000, 'Clerk', to_date (December 10, 1989 "," DD-MON-RRRR'), 2, to_date (March 2, 2012 14:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (1, 'Sanjeev', 1900, 'Clerk', to_date (December 10, 1989 "," DD-MON-RRRR'), 3, to_date (March 2, 2012 15:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (2, 'Scott', 2000, 'Analyst', to_date (October 22, 1985 "," DD-MON-RRRR'), 1, to_date (May 2, 2012 13:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (2, 'Scott', 2000, 'Analyst', to_date (October 22, 1985 "," DD-MON-RRRR'), 2, to_date (May 2, 2012 14:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (2, 'Scott', 3000, 'Lead', to_date (October 22, 1985 "," DD-MON-RRRR'), 3, to_date (May 2, 2012 15:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (3, 'Smith', 4000, 'Lead', to_date (22 October 1981 "," DD-MON-RRRR'), 1, to_date (June 2, 2012 13:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (3, 'Smith', 5000, 'Lead', to_date (22 October 1981 "," DD-MON-RRRR'), 2, to_date (June 2, 2012 14:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (3, 'Smith', 5500, 'Lead', to_date (22 October 1981 "," DD-MON-RRRR'), 3, to_date (June 2, 2012 15:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (3, 'Smith', 8000, 'CTO', to_date (22 October 1981 "," DD-MON-RRRR'), 5, to_date (June 2, 2012 17:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (4, 'Tom', 4000, 'Lead', to_date (22 October 1981 "," DD-MON-RRRR'), 1, to_date (July 2, 2012 13:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (4, 'Tom', 5000, 'Lead', to_date (22 October 1981 "," DD-MON-RRRR'), 2, to_date (2 July 2012 14:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (4, 'Tom', 5500, 'Lead', to_date (22 October 1981 "," DD-MON-RRRR'), 3, to_date (July 2, 2012 15:00 ',' DD-MON-RRRR hh24:mm'));
Insert into EMP_HIST (ENO, ENAME, SAL, JOB, DOB, VERSION)
values (4, 'Tom', 8000, 'CTO', to_date (22 October 1981 "," DD-MON-RRRR'), 4, to_date (July 2, 2012 16:00 ',' DD-MON-RRRR hh24:mm'));
I want to display changes (current value and previous value)
for each column as below.
PK_Value Column_Name Previous_value Current_Value
-------------- -------------------------- -------------------- --------------------
1         ENo                1                        1
1 Ename Sanjiv Sanjeev
1 1000 1900 sal
1 committed post clerk
1 DATE OF BIRTH 12/10/89-12/10/89
2         ENo                2                        2
2 Ename Scott Scott
2 sal 2000 3000
2 senior analyst job
2 DATE OF BIRTH 12/10/89-12/10/89
3         ENo                3                        3
3 Ename Smith Smith
3 5500 8000 sal
3         Job                         Lead                  CTO
3 DATE OF BIRTH 12/10/89-12/10/89
Solution for above requirement is query below.
WITH
got_r_num AS
(
SELECT
Eno,
Ename,
To_char (sal) AS sal,
employment,
To_char (dob, 'DD-MON-YYYY') AS date of birth,
ROW_NUMBER () OVER (PARTITION BY eno ORDER BY version DESC) AS r_num
Of
emp_hist
)
SELECT
*
Of
(got_r_num) PIVOT UNPIVOT (str FOR column_name IN (ename, sal, job, birth date))
MIN (str) FOR r_num IN (2 AS previous_val, 1 AS)
current_val))
ORDER BY
Eno,
Column;
But there are a few changes to the rquirement as below
There is a table that maintains the version the most recent/maximum for each employee.
Table EMP_AUD_LOOKUP have structure below
CREATE
TABLE emp_aud_lookup
(
ENo NUMBER,
Version NUMBER
);
Insert into emp_aud_lookup (ENO, VERSION) values (1.3);
Insert into emp_aud_lookup (ENO, VERSION) values (2,3);
Insert into emp_aud_lookup (ENO, VERSION) values (3.6);
Insert into emp_aud_lookup (ENO, VERSION) values (4.6);
version of Eno
------ -----------
1 3
2 3
3 6
4 6
maximum/later in the EMP_AUD_LOOKUP table.
For emp = 1, version the most recent/maximum is 3
For emp = 2, version the most recent/maximum is 3
For emp = 3, version the most recent/maximum is 6, if it's 5 emp_hist table but the matching record in
Table 6 (since it can be changed in other tables to load of the EMP_AUD_LOOKUP
that is the case has changed in child table thats why he is 6)
For emp = 4, version the most recent/maximum is 6, if it is 4 emp_hist table but the matching record in
Table 6 (since it can be changed in other tables to load of the EMP_AUD_LOOKUP
that is the case has changed in child table thats why he is 6)
Updated the result will be like
PK_Value Column_Name Previous_value Current_Value
-------------- -------------------------- -------------------- --------------------
1         ENo                1                        1
1 Ename Sanjiv Sanjeev
1 1000 1900 sal
1 committed post clerk
1 DATE OF BIRTH 12/10/89-12/10/89
2         ENo                2                        2
2 Ename Scott Scott
2 sal 2000 3000
2 senior analyst job
2 DATE OF BIRTH 12/10/89-12/10/89
3         ENo                3                        3
3 Ename Smith Smith
3 8000 8000 sal
3         Job                         CTO                   CTO
3 DATE OF BIRTH 12/10/89-12/10/89
4         ENo                4                        4
4 Tom Tom Ename
4 8000 8000 sal
4         Job                         CTO                   CTO
4 DATE OF BIRTH 12/10/89-12/10/89
In the case of ENo = 1, will be later
SELECT version in v_latest OF EMP_AUD_LOOKUP where Eno = 1;
v_latest = 3
Latest = > max (version) of emp_hist < = v_latest or 3 < = 3 so 3
Previous = > max (version) of emp_hist < v_latest-1 or 2 < = 2 so 2
In the case of ENo = 2, will be later
SELECT version in v_latest OF EMP_AUD_LOOKUP where Eno = 2;
v_latest = 3
Latest = > max (version) of emp_hist < = v_latest or 3 < = 3 so 3
Previous = > max (version) of emp_hist < v_latest-1 or 2 < = 2 so 2
In the case of ENo = 3, will be later
SELECT version in v_latest OF EMP_AUD_LOOKUP where Eno = 3;
v_latest = 6
Latest = > max (version) of emp_hist < = v_latest or 5 < = 6 so 5
Previous = > max (version) of emp_hist < v_latest-1 is 5 < = 5 so 5
In the case of ENo = 4, will be later
SELECT version in v_latest OF EMP_AUD_LOOKUP where Eno = 4;
v_latest = 6
Latest = > max (version) of emp_hist < = v_latest or 4 < = 6 so 4
Previous = > max (version) of emp_hist < v_latest - 1 = 4 < = 5 so 4
Can we make changes above with a modified respect logic based on the id of the most recent version of the other table.
either we can manipulate in row_number() function.

Hello.. Try the below...

WITH qry1 AS (SELECT eno,

Ename,

SAL,

employment,

Date of birth

Version

Max (version) OVER (PARTITION BY eno) mx_ver

Of emp_hist).

qry2 AS

(SELECT eno1,

To_char (Eno) eno,

Ename,

To_char (SAL) sal,

employment,

Date of birth to_char(DOB,'DD-mon-YYYY'),

To_char (ld_eno) ld_eno,

ld_ename,

To_char (ld_sal) ld_sal,

ld_job,

To_char(DOB,'DD-mon-YYYY') ld_dob

FROM (SELECT q1.eno, eno1,

Q1. Nwe eno,

Ename,

SAL,

employment,

Date of birth

INF. ROW_NUMBER() over (PARTITION BY q1.eno ORDER BY q1.version),

Lead (Q1. Eno, 1, Q1. ENO) OVER (PARTITION BY q1.eno ORDER BY q1.version) ld_eno,.

Lead(Ename,1,Ename) OVER (PARTITION BY q1.eno ORDER BY q1.version) ld_ename,

Lead(SAL,1,SAL) OVER (PARTITION BY q1.eno ORDER BY q1.version) ld_sal,

Lead(Job,1,Job) OVER (PARTITION BY q1.eno ORDER BY q1.version) ld_job,

Lead(DOB,1,DOB) OVER (PARTITION BY q1.eno ORDER BY q1.version) ld_dob,

version Q1.version

OF qry1 q1 emp_aud_lookup eal

WHERE q1.eno = eal.eno

AND (q1.mx_ver = eal.version AND (q1.version = q1.mx_ver OR q1.version = q1.mx_ver - 1))

OR(Q1.mx_ver <> EAL.version and Q1.version = Q1.mx_ver)))

WHERE rn = 1)

SELECT eno1 eno,

CASE WHEN lvl = 1 THEN 'ENO '.

ONCE lvl = 2 THEN 'ENAME '.

ONCE lvl = 3 THEN 'SAL '.

ONCE lvl = 4 THEN "JOB."

ONCE lvl = 5 THEN 'DOB '.

ELSE 'N/A '.

END as col_name,

CASE WHEN lvl = 1 THEN eno

ONCE lvl = 2 THEN ename

ONCE lvl = 3 sal THEN

ONCE lvl = 4 THEN employment

ONCE lvl = 5 THEN dob

END as previous_value,

CASE WHEN lvl = 1 THEN ld_eno

ONCE lvl = 2 THEN ld_ename

ONCE lvl = 3 THEN ld_sal

ONCE lvl = 4 THEN ld_job

ONCE lvl = 5 THEN ld_dob

END AS current_value

OF qry2, (lvl SELECT LEVEL FROM dual CONNECT BY LEVEL<=>

ORDER BY eno, lvl;

OUTPUT:-

-------

ENO COL_N PREVIOUS_VALUE CURRENT_VALUE

---- ----- --------------- ---------------

1 1 1 ENO

1 ENAME Sanjiv Sanjeev

1 1000 1900 SAL

1 committed POST clerk

1 DOB DECEMBER 10, 1989 10 DECEMBER 1989

2 2 2 ENO

2 ENAME Scott Scott

2 SAL 2000 3000

2 senior analyst JOB

2 DATE OF BIRTH 22 OCTOBER 1985 OCTOBER 22, 1985

3 3 3 ENO

3 ENAME Smith Smith

3 8000 8000 SAL

3 USE CTO CTO

3 DATE OF BIRTH 22 OCTOBER 1981 OCTOBER 22, 1981

ENO 4 4 4

4 Tom Tom ENAME

4 8000 8000 SAL

4 JOB CTO CTO

4 DATE OF BIRTH 22 OCTOBER 1981 OCTOBER 22, 1981

20 selected lines.

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