Profile of PID setpoint

Hello guys

I work on the project using the NI USB 6251 case and labview. I use VI profile for setpoint PID to make setpoint 7 volts at t = 0 and 0 Volt at t = 5, then back to 7V to t = 10 and 0V again at 15, repeatedly (7V every 10 seconds) until I have stop the execution of the VI. any ideas?

Thank you for your help

When you set the profile to use, simply "toggle" the "reset" and the function will start the profile, as t = 0. This example shows how you can start by pressing a button:

C:\Program Files (x 86) \National Instruments\LabVIEW 2015\examples\control\PID\Setpoint profile Simulator.vi

However, if you really want to restart automatically, wire "full profile?" via a shift register to 'reset '? entry and the profile will be repeated continuously. This another example is exactly that:

C:\Program Files (x 86) \National Instruments\LabVIEW 2015\examples\control\PID\Setpoint profile with hourly so that lift and Falling.vi

Furthermore, if you look in this folder:

C:\Program Files (x 86) \National Instruments\LabVIEW 2015\examples\control\PID

You will see several example that will be of interest to you to learn how to use LabVIEW and control functions.

Hope this helps,

Tags: NI Software

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    [Mon Apr 18 15:32:03.444627 2016] [: debug] [pid 43570] mod_hfs_apple2.c (363): [client 10.114.135.7:51608] mod_hfs_apple: compare_paths/Library/Server/Web/Data/Sites/Default/vs proxy: balancer://com.apple.devicemgr.rails/magic/do_magic/, associated with = 0, referer: https://www.mmhs.info/profilemanager/

    [Mon Apr 18 15:32:03.444637 2016] [: debug] [pid 43570] mod_hfs_apple2.c (363): [client 10.114.135.7:51608] mod_hfs_apple: compare_paths /Applications/Server.app/Contents/ServerRoot/usr/share/web/customerror/ vs proxy: balancer://com.apple.devicemgr.rails/magic/do_magic/, associated with = 0, referer: https://www.mmhs.info/profilemanager/

    [Mon Apr 18 15:32:03.444645 2016] [: debug] [pid 43570] mod_hfs_apple2.c (363): [client 10.114.135.7:51608] mod_hfs_apple: compare_paths.*\\\.\\\.namedfork/ vs proxy: balancer://com.apple.devicemgr.rails/magic/do_magic/, associated with = 0, referer: https://www.mmhs.info/profilemanager/

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    [Mon Apr 18 15:32:03.444676 2016] [lbmethod_byrequests:debug] [pid 43570] mod_lbmethod_byrequests.c (95): AH01207: proxy: enter byrequests to SWING (balancer://com.apple.devicemgr.rails)

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    [Mon Apr 18 15:32:03.444694 2016] [proxy_balancer:debug] [pid 43570] mod_proxy_balancer.c (614): [client 10.114.135.7:51608] AH01172: balancer://com.apple.devicemgr.rails: worker (http://127.0.0.1:3321), rewritten in magic / http://127.0.0.1:3321 / do_magic, referer: https://www.mmhs.info/profilemanager/

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    [Mon Apr 18 15:32:03.444710 2016] [proxy: debug] [pid 43570] proxy_util.c (1825): AH00926: already initialized worker http://127.0.0.1:3321 local

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    [Mon Apr 18 15:32:12.635084 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of authorization to require the ip address 127.0.0.1: granted

    [Mon Apr 18 15:32:12.635093 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of < RequireAny > permission: granted

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    [Mon Apr 18 15:32:24.650466 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of authorization to require the ip address 127.0.0.1: granted

    [Mon Apr 18 15:32:24.650475 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of < RequireAny > permission: granted

    [Mon Apr 18 15:32:24.650494 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths/Library/Server/Web/Data/Sites/Default/vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:24.650503 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths /Applications/Server.app/Contents/ServerRoot/usr/share/web/customerror/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:24.650511 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths.*\\\.\\\.namedfork/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:24.650518 2016] [: debug] [pid 42782] mod_hfs_apple2.c (372): [client 127.0.0.1:60421] mod_hfs_apple: access with no corresponding directory. filename = / var/empty/devicemanagement

    [Mon Apr 18 15:32:24.650810 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (584): [client 127.0.0.1:60421] AH00840: inside the shmcb_status

    [Mon Apr 18 15:32:24.650832 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (673): [client 127.0.0.1:60421] AH00841: leaving shmcb_status

    [Mon Apr 18 15:32:28.656349 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: refused authorization result to require all: refused

    [Mon Apr 18 15:32:28.656468 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of authorization to require the ip address 127.0.0.1: granted

    [Mon Apr 18 15:32:28.656477 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of < RequireAny > permission: granted

    [Mon Apr 18 15:32:28.656509 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths/Library/Server/Web/Data/Sites/Default/vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:28.656518 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths /Applications/Server.app/Contents/ServerRoot/usr/share/web/customerror/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:28.656526 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths.*\\\.\\\.namedfork/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:28.656533 2016] [: debug] [pid 42782] mod_hfs_apple2.c (372): [client 127.0.0.1:60421] mod_hfs_apple: access with no corresponding directory. filename = / var/empty/devicemanagement

    [Mon Apr 18 15:32:28.656810 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (584): [client 127.0.0.1:60421] AH00840: inside the shmcb_status

    [Mon Apr 18 15:32:28.656831 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (673): [client 127.0.0.1:60421] AH00841: leaving shmcb_status

    2:32.661825 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: refused authorization result to require all: refused

    [Mon Apr 18 15:32:32.661947 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of authorization to require the ip address 127.0.0.1: granted

    [Mon Apr 18 15:32:32.661956 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of < RequireAny > permission: granted

    [Mon Apr 18 15:32:32.661974 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths/Library/Server/Web/Data/Sites/Default/vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:32.661982 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths /Applications/Server.app/Contents/ServerRoot/usr/share/web/customerror/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:32.661990 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths.*\\\.\\\.namedfork/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:32.661997 2016] [: debug] [pid 42782] mod_hfs_apple2.c (372): [client 127.0.0.1:60421] mod_hfs_apple: access with no corresponding directory. filename = / var/empty/devicemanagement

    [Mon Apr 18 15:32:32.662274 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (584): [client 127.0.0.1:60421] AH00840: inside the shmcb_status

    [Mon Apr 18 15:32:32.662294 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (673): [client 127.0.0.1:60421] AH00841: leaving shmcb_status

    15:32:36.664357 April 18, 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: refused authorization result to require all: refused

    [Mon Apr 18 15:32:36.664473 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of authorization to require the ip address 127.0.0.1: granted

    [Mon Apr 18 15:32:36.664490 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of < RequireAny > permission: granted

    [Mon Apr 18 15:32:36.664509 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths/Library/Server/Web/Data/Sites/Default/vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:36.664518 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths /Applications/Server.app/Contents/ServerRoot/usr/share/web/customerror/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:36.664526 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths.*\\\.\\\.namedfork/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:36.664533 2016] [: debug] [pid 42782] mod_hfs_apple2.c (372): [client 127.0.0.1:60421] mod_hfs_apple: access with no corresponding directory. filename = / var/empty/devicemanagement

    [Mon Apr 18 15:32:36.664815 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (584): [client 127.0.0.1:60421] AH00840: inside the shmcb_status

    [Mon Apr 18 15:32:36.664835 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (673): [client 127.0.0.1:60421] AH00841: leaving shmcb_status

    15:32:40.667388 April 18, 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: refused authorization result to require all: refused

    [Mon Apr 18 15:32:40.667506 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of authorization to require the ip address 127.0.0.1: granted

    [Mon Apr 18 15:32:40.667514 2016] [authz_core:debug] [pid 42782] mod_authz_core.c (806): [client 127.0.0.1:60421] AH01626: result of < RequireAny > permission: granted

    [Mon Apr 18 15:32:40.667534 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths/Library/Server/Web/Data/Sites/Default/vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:40.667542 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths /Applications/Server.app/Contents/ServerRoot/usr/share/web/customerror/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:40.667551 2016] [: debug] [pid 42782] mod_hfs_apple2.c (363): [client 127.0.0.1:60421] mod_hfs_apple: compare_paths.*\\\.\\\.namedfork/ vs/var/empty/devicemanagement / associated with = 0

    [Mon Apr 18 15:32:40.667558 2016] [: debug] [pid 42782] mod_hfs_apple2.c (372): [client 127.0.0.1:60421] mod_hfs_apple: access with no corresponding directory. filename = / var/empty/devicemanagement

    [Mon Apr 18 15:32:40.667836 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (584): [client 127.0.0.1:60421] AH00840: inside the shmcb_status

    [Mon Apr 18 15:32:40.667856 2016] [socache_shmcb:debug] [pid 42782] mod_socache_shmcb.c (673): [client 127.0.0.1:60421] AH00841: leaving shmcb_status

    Bump!  Anyone?

  • Basic concept of loop PID closed

    Hello

    I have a problem of very basic concept of PID loop closed. I read a lot of material of the PID controller but still confused.

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    If you have a transfer function for your plants, you don't need PID, because the output of the optimal control can be determined directly from the transfer function! (Well, more specifically, often in this case you would use the transfer to feed-forward control function, which you would combine with PID to correct minor variations between the reality and transfer function model.)

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  • PID output problem

    Hi guys,.

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    Not the Gain annex vi does not change your output according to the entry it will select all of the gains that you want to use. In a certain type of profiles, we will have to use a different set of earnings, so in these cases, you can have a different set of gains and which apply accordingly. For your business simple PID must be suffucient.

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    I have attached photos and my VI for your reference. Thanks in advance.

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    I am writing a multichannel PI controller using the PID vi (in the PID toolkit). All channels have the same point of setpoint, output range and PID adjustment of the values. In the help file for the vi of PID, he says:

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    Dave

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  • Conversion gain proportional and derivative to significant stiffness and damping units PID

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    Hi Nathan,

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    Hello!

    I want to update and make some changes on an old LabView project, done like 10 years ago.

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    Martins wrote:

    1, in my new LabView VI, I will automatically be set the range on the Keithley, when it is necessary during the control. Given that I'll use absolute value for the PID, which gain approach P should be used?

    (I guess the I and D can remain the same) Should I use P = 0.03? Note, I want to the wire that the value of process directly to the advanced PID VI, not the difference between the PV and SV. Also, the PID on must be directly in Ampere, connected directly to Keithley screws.

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    Martins wrote:

    2, in this old VI, what "iteration" means? I don't see any similar parameters between my toolkit LabView 2012 PID live...

    Senior year "iteration" is somewhat similar to the entrance of "Reset". You can search in the VI and see what he does. For most it resets the Integrator and disables the derived control when it is 0 (the first iteration). It also disables the process variable of filtering for the first 3 iterations. The idea is that you connect directly to the terminal of the iterator of a while loop.

    Martins wrote:

    3, I wonder, too, why the developer in the old days used dt = 20 s, and structure has been placed in a while loop traveled in 1 second. What that entails actually in control

    I don't see where the dt is set to 20. The dt is purely a mathematical structure, and assuming that the timing is consistent from one iteration to the next, you can set the I and the D values to match any dt value and get the same result. A detachment of the 1920s and a me 20s should be identical to a detachment of 1 s and an I 1 s (note, however, that in the current PID toolkit, I made a few minutes even if dt is in seconds) - in both cases, you are saying that the full time is a simple loop cycle. Definition of dt to do anything other than-1 is mainly useful to simulate a controller offline, for example in the simulation, if you can run the controller much faster than real-time.

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