Register to offset State Machine

Similar Questions

• In the state machine loop counter

  Hi all

  I have a state machine, and one State in particular is very busy.  I want to State in a loop several times.  I thought about that, but I don't like them.  Let me know if you have a better idea.

  1 Add a registry to offset as a counter for the State.  The State will keep looping to himself, while decrementing the counter.  If the counter is reset, it will go to the next State.  If this isn't the case, it will keep the loop.  I don't like this, because I'll have to add a register to offset.  If I have a little more State requiring a different number of iteration, I'll have to add a counter for that State.  My main VI will be too shift registers.

  2. Add a loop around the code in my case for iteration.  I do not, because too many wires will be going in and out of the loop.  I don't want to do cluster either.

  Yik

  jyang72211 wrote:

  Node of a feedback by counter I need?

  Yik

  With precision.  See this example, each State 5 times before moving earrings.  Beats having 5 shift registers and all of these threads passing through other cases.

• queue and notifying with state machine

  I'm trying to implement a declarant and a queue to collect data that is running on a state machine in two separate loops.  I'm new to the whole and methods notifier queue and I think I'm really close to make it work as I want.  When I start the computer the first time that State everything works and it is what I expected.  When I try to restart the test and do it again she acts like the queue has been cleared and it will not connect anything to the queue.  I use the queue as a buffer for the data collected between iterations of the loop of State machine.  I empty the queue and add all the data in a table.  The declarer seems to work in all situations as I want.  I have attached a simplified version of what I'm trying to do.  Any ideas? Thank you.

  After the execution of your code (I had to make my own custom control to the States because you include not yours) and some survey values, here's the conclusion that I came to:

  It is not your queue.

  It's your math.

  In your upper loop, put sensors on the values you use to trigger the 'True' case (specifically, put a probe on the values to enter your service "superior or equal to") and then watch their values that you run your code.  The value that is coming through the shift register is your problem.  He isn't getting back to zero when you restart the test.  The first time you run your program, the value is zero.  For subsequent iterations, it's everything the last calculated deflection was.  Run your button 'force' down to zero once your test is over and look at what this value.

  Thus, when you restart your test without having to restart your program, you start with a nonzero value for calculated arrow.  Is to prevent your delta never exceed 0.001 in., and therefore your 'Real' case never executes.  So nothing ever shows in your queue.  You do not put anything in your queue.

  The reason why you go to your "complete" State in the lower loop when you hit 0.3 in flexion is because the current value of the 'deviation' is passed through your Notifier and is not dependent on the previous value of the way your queue is.  So you can always hit deflection 0.3 in., without calculated being greater than 0.001 in. delta.

  Try to reset this registry offset value in your greater than zero loop every time that you restart the test, and your program will probably work.

  And Ravens Fan has a point about the complexity.  It usually does.

• Use the state machine to fill cluster

  Hello

  I am trying to create a state machine that is running two States, each State has two items up to a Bundle function and in the cluster. I want the two elements of the State first across, then the second State should run and pass the last two items. Currently, I get only the data of the final State. I have one the vi attached.

  Thank you

  Chris

  You don't actually have a state machine.  What you have is a simple loop, and nothing of what is happening in the previous iterations of the loop is spent in later iterations.

  You must create the cluster in the loop itself and maintatin into a shift register.  Use the bundle by name to update the respective elements of the cluster in each picture of the structure of the case.

  

• Problem updating my state machine, using the emg signal

  Hello

  I have problems with my code. My entry is an EMG signal that I gather from three different electrodes using usb 6008. In the program, I divide the signals and display them in a chart that is unique. What I want now is to read the signal, and if a signal passes a threshold I want an LED lights. This must remain lit until there is another signal that passes the threshold.

  To put it simply: "large enough signal--> lamp on--> stay informed--> enough large signal--> lamp--> stay off the coast and then start again."

  I tried a few different approaches, but I decided using a state machine. Now, the problem is that when the signal to enter the state machine the program crashes. I think it's because the table that I use to convert the signals does not update when I get my state machine, so the signal stops to come. But how to get around this problem? It is even possible to code what I want?

  I have attached the code. All the tips are welcome, I have been struggling with this for some time now.

  Thank you

  jenmich

  The problem is internal while the loop is run until the stop condition is true, but he never does a new Boolean entry. So that it remains for always in the same State. Remove the inner loop and put the shift register on the outer loop instead.

  You must also use a daqmx configures the element, and then set the properties of daq. The read.vi can be set to read a number of samples of each iteration.

  Also: you can expand the table to index for several items of output. If you want that element number 0, 1, and 2, you have yet to wire the index entries

• Timing of a State Machine in the States

  Hi LabView community.

  I'm running a state machine (attached) in which I want to measure the duration that the VI is running in several States. The VI is used to take spectra of power of various samples. My scheduled execution goes like this: the user selects on the front panel, how many times they would like to see the data taken. After pressing start on the front panel, a timer starts. When the machine is in State of 'Waiting', I would like to have the VI wait the amount of time the user has selected the amount of time that has elapsed since the user pressed start. So, for example, if the user wanted a spectrum taken every 15 minutes and the time since the departure was 13 minutes, I would like the program to wait for 2 minutes, then repeat.

  If someone could help me with this, it would be much appreciated!

  Thank you in advance.

  You just need to save in a shift register either time has begun the activity.  Or the sum of the amount of time that has already elapsed.

  PS: You used a large number of local variables and none of your terminals.  Good number of these local variables should also be so shift registers.

• State machine

  Hello

  I get a code for a test setup using the model of State machine project.

  "Standby mode", I would like to show some sort of device face: I want to continually read data and update several indicators, until any key is pressed (triggering of the structure of the event in mode ' sleep').

  However, as I want to "lock when you press on" for fixing buttons (Boolean controls), I can not all their share values. I don't want to "switch when you press on, as is a two UI bad (in my opinion) and caused some disorder (once back to the idle state, cannot press any other button)."

  I would greatly appreciate guidance on how this can be done. A picture of what I want to do, to better illustrate my intention is attached.

  Thank you!

  cl0ck wrote:

  However I'm initializing in the first loop, I need to start with data acquisition off and be able to activate any (in the second loop) from the first.

  I tried 'Wait on Notification' wiring to a case structure, and put the data acquisition in the case of 'true', but for continuous playback, I always send notifications, which I am not in my real program.

  Have your notification send a REAL for the start, data acquisition and a FALSE for when to stop.  When you get the value TRUE, you can set the timeout of your wait on Notification to how fast you want to make your purchase and assign - 1 (wait forever) when you are ordered to stop.  You can simply store this time-out in a shift register.  So then you get data if you got a notification TRUE OR if you have a timeout.

• Calendar of State machine

  Hi family OR. I have two questions. How can I make the transition in order for the state machine attached more quickly. Also, I would like to know how to set my timing. The time indicated on my wait function is off when I actually run the VI.

  Place your DAQ initialization in your initialization state.  Right now it initializes each iteration of the loop.  This is not necessary and wasting time.  Use a shift register to pass the reference of the DAQ tasks.  Do you need to write in the acquisition of data in all States?  At present he writes anything to the State.  Move the writing of data to the States if necessary.  This will speed up your code too.

  Why do you say that your calendar function waiting is off?  How far?  You know that your actual time for the waiting cycle is more than just the waiting time.  It includes other operations outside the structure of the case.  Movement of data acquisition will be the more accurate wait.

• problem of data flow in the case structures (using a state machine)

  Good day everyone.

  I'm having a problem with the flow of data between the structures of the case.

  I try to use an example of a state machine for this simple problem. but when I try to send data of a box structure to change the State of the code. It will change not in the desirable output, instead, it offers the possibility that the exit options emul.

  could someone please point what I'm doing wrong here. Any kind of help would be very appreciated.

  With a quick glance at your photos a question you have is that you use not data flow. You write your status updated in local variables value. Your State should pass through the case structures are a single wire. Playback of your order "Enum", happened in the register shift on the right side of your loop probably get running and reading before any processing occurs within the structure of your business. That's why you're reading the old value of the State and not the update. or have a classic case of a race condition in your code.

• Replacement of a state machine?

  I'm relatively new to the use of the State machines and hope that there is a simple solution to this issue. I have a registered state machine (IE StateMachine1.ctl). I created a new machine of the State (StateMachine2.ctl) and you want to replace all instances of StateMachine1 by StateMachine2 in my VI. Is there a simple way to change the state machine without losing all linked instances?

  Thank you.

  LWolfe.

  I remember doing a VI to find instances of a type def control and the replacement by another.  Very similar to what you describe.  He used script and it was surprisingly hard to do.  Oh, and I managed to find it.

• Can I do the equivalent of a register to offset with a start value of variable?

  I have an array of samping frequency values (determined by an external signal) and I would like to extract a value both of this table to use as the frequency of sampling for another signal.

  The shift register is almost what I want. The problem is that I still won't start at element 0, but rather to the first value of positive sampling frequency, which has a slightly different every time. Once this value is reached, I want the index to increment by 1 on each iteration of the loop (which already does).

  I have attached a VI for reference. Any suggestions?

  The structure of the case is inside the while loop.  It's a bit like the structure used for the State machines.  Look at the VI attached. I didn't test it.

  In general, you should avoid buiding an array within a loop as it will eventually cause memory allocation problems (= program crash!).  It is best to allocate an array as important or more than the maximum that you expect to use outside the loop and replace a subset of table inside the loop.

  Lynn

• STOP button for program waiting in a state machine

  Hello

  I am trying to create a state machine in order to control a conveyor, mixer pump and linear actuator. Each component runs in sequential order all the time, so I thought that using a state machine would probably be the best architecture program.

  The problem that I am facing, it's that there are States that require more time before the start of the next State. For example, I need to be able to run the pump or mixer for an another period of time. I understand that simply using the VI of waiting is not a good idea because it removes the option to stop the program on the chance that something goes wrong (at least until the end waiting for execution function). I tried to use clock calendar in order to force the program to wait for a term between States, but I found myself with all nested in loops for each State that require stop buttons separate who ends up doing the complicated program (this is what we see in the attached VI).

  I looked at other threads mentioned using notifiers or the structures of the event, but since I use a state machine, I don't know how to use them with several States.

  If there is a way to force synchronization between States while maintaining control of stop button and, eventually, the ability to run any code while you wait, please let me know. I have attached the VI I train, and the emphasis is on the 'wait to hatch open' State.

  Thank you.

  That your state machine shift register is a cluster.  First point is an enum for say the next State to go to.  Second element is a digital that defines how long to wait if the next State is a wait.  Third point is an another enum as first to tell what State to go after the wait ends.

  Start of the loop of State machine, ungroup the first point to know what State to go to.  In your state of waiting, when you have determined the wait is made, ungroup the 3rd point.  Set the first element of the cluster machine of the State to be this enum even if he goes on the next State.  Basically leave wire to move the machine of State wear with it another State of the State, not only the next State, but also what would be the next state when the next State is completed (in case there are several choice.)

• For the State Machine logic makes me Mad, ideas?

  Hello

  I am a complete newbie to Labview and up to the help of kind people on the forum and tutorials tips, State where I implement a state machine.  However, I can't it behave using logic.

  What I try to do is to test the relay using an automated test procedure.

  The procedure takes the following measures:

  1. a card reader and transistor NI9472 DO turns the relay power via the power of the coil (needs of the variable time period). (It's OK)

  2. account of how can cycles the relay contacts worked, it will easily exceed 100,000 cycles. (It's OK)

  3. every 10 cycles (new variables), the contacts are held closed, load circuit "15A in the state machine" (the current relay is switching, which will be 15 a at 30V) is turned off.

  4. While the State of 15A is off, I need to switch to 'State of 1' and the 'State of the measure' , that it allows the measure to take.

  5. Finally, the "State measure and the"State of A 1"must be turned off and the"15A State switched back on .

  6. this process continues for another 10 cycles and repeats.

  I tried to do by using the States and the logical selection function for different States, where she part works, it does not seem to flow completely.  I'm I missing logic.

  Hoping someone may be able to help, thanks

  Andy

  I really didn't thing you want to be returning this Boolean value in all States.  You should probably also have a different evolution register for each line of output.  Then you simply adjust those that you need to.

• Master/slave event Structure vs. State Machine

  Hello

  First some background to the question (skip this paragraph if you are simply interested in the question). I'm relatively new to Labview, after only a few months of coding with Labview and LabVIEW Core 1. Being one of the only people in the company who now knows Labview I have been challenged with the creation of a relatively complex application that will perform a selected ten or to view different tests with customizable options, display, analyze and deliver and automate reports.

  For the application I am writing I need a GUI with several screens (I achieve with tabs), initially I tried this code with the structures of the event within a machine to States (but as you probably know this was fundamentally flawed, that you can't put structures of the event within the structures of the case) (, or structures of the event), but from here, I spent several hours of searching the best alternatives.

  So my Question is: would recommend to use a master-slave (with the structure of the event and the State of computer, respectively), or simply use to continually voting machine status?

  (Keep in mind I'm going to use this as part of a larger facility of producer/consumer.)

  Thanks in advance,

  Joshua Walker.

  I use a case in my state machine specifically for checking to GUI events.  It is usually a "Idle" State or a specific State to 'check events.  I can also set the time-out programmatically by using a register shift, just in case I need to do a quick check (some small timeout) or wait for a user to press a button (timeout is - 1).

• Shift registers and state machines

  I am creating a VI that controls a power supply, a switching system and a nanovoltmeter so that I can measure the Seebeck of different materials. After reading through these forums, it seems that the overwhelming opinion was that the state machine is much better than the structures of the cell, which was what I was going to initially use. However, I have a problem. To control my sourcemeter, I the user to enter the number of steps (time machine increases the voltage), a final voltage and output voltage. Of these, I get the value of the increment. However, within my state machine that the first step is transferred to the structure of the case. I used probes to see how information is moving, and it seems that the voltage value is increment correctly but the real VI for the power supply receives the initial value. I'm just wondering how to pass the updated values in the structure dealing with each iteration.

  I've included the vi. It is far from over because I'm sure you will see, but my current problem in the case of 'change v '. That said, if anything jumps out and you feel the immediate needs, feel free to say it, I learn and I accept all the entries.

  I recommend that you run your VI highlight execution lit.  This will help you understand what's happening better.

  Just to remind, only 1 case in structure can work iteratively.  If you have a TRUE/FALSE in the middle of a VI case structure you plan to run both cases?  Of course not.  Same thing here.

  So keep your current tension in a shift register and increment only when you are in the case of set.  Stop your state machine when your voltage exceeded the stop voltage (have a just State to check this box to make things easier).