State machine::how to

Similar Questions

• State machine: how to find the number of transitions:

  Hi Member

  I have this machine of States show below

  where x: output input and y where the two streams of bits each and zeros

  I ask how can I calculate the number of transitions between s1 to s1, s1, S2, s2 to s1, s2, s3 and up to s6 to s6, s6 to s5 and so on

  all chanage in lv I'll gracfull

  I thank you in advace

  

  Man, it is not difficult to read using LabVIEW on nodes of property.

  Right click on your am' value on the diagram, select "create one-> property node", right click and select 'Edit to write' and the little hand tool to select the 'value' to the subject property. Then it wire to the output of your block on the right.

• How to wire state machine

  I am trying to learn how over the state machine.  I created this simple vi.  The intention is to take the entry, and if it is less than 5, then the value squared.  If it is greater than 5, then the value should be cut into cubes.  However, I only get squared values.  What is missing here?  For a value greater than 5, I get the value "2" appears in the output area square... whence the 2?

  NIquist beat me to the punch.  I made this moification an got tied up before I could post it for you.

  Unfortunately for you, these examples show only two States that do not help House by car at the point of a state machine.  You can have several States to treat your data or move you your application.

  I have developed your VI a little to show a few things.  There are essentially 3 separate running in the loop state machines.  The bottom is a simple example where to put your code based on what you need to do.  Then you determine what state your data tells you to go to the next, and you may have several States here, not only two.

• How do you create array of enumerations for transitions in a state machine?

  Hello

  I am trying to build a state machine, but I am struggling with understanding of the methods to determine what State to move to the next.  In other words, I have several States, but I don't want to go in any particular sequence.  If I States numbered 1 to 10, I want to be able to go 1-4-2-5-6-2-6-1-10 etc. in no particular order. I want the transition to the next State (and actions) to be determined by data stream, which may be random and require access to one of my 10 States at any time and in any order.

  I saw this photo on the white paper "Application Design Patterns: machinery of State", but it leaves out some important details.  How do I create the structure in BLUE showed 3 c?  When I try to create this table of enums, all are the same. I am not able to make a list of different enum values.  In other words, when I type '2', then all values in the Bulletin Board "2."

  There is a nice video example and easy to a state machine for the distribution of soda $0.15, however, this state machine moves in a single sequence of 5 cents, 10 cents to deliver; It does NOT illustrate the selection of a State "out of order".  I need to understand how a state machine can move State "5 cents" to distribute directly, with the addition of 10 cents in the State "5 cents.

  Can someone suggest a very good tutorial on how to make the switch to operate in a state machine?  I have read some documents available on ni.com, but, I can't find a good explanation of how do.  I remain confused.

  Or, you can just explain how they created the BLUE table in the attached picture?  Maybe I can understand it from there.

  Thank you

  Dave

  
  

• How to transmit DATA between several state machines.

  Hi I'm doing a project that needs to acquire data from a simulated data file and display it on a graphical interface. Two of them are manufactured in a state machine. I wonder if it is a good way of communication of data between two state machines? It would be very appreciated if you can provide a few examples. Thank you very much.

  OK, there are plenty of ways to communicate, but who are these state machines in the same project? Same VI? All LabVIEW?

  I like functional global variables due to the functionality that can be included in the. If they are used wrongly, as most of the things with the coding, you will create the races and break your code.

  Work of local variable, but I try to clear them tsar when possible. If they are used wrongly, as most of the things with the coding, you will create the races and break your code.

  Queues are pretty popular to connect, but try to stay with fixed size data, if you think that the limits of memory could be a problem.

  If you speak through the eyes of network to published static Variables (do not use these unless you have a stable network) network, TCP/IP, UDP, or Web Services flow (you need experience in this field. It is not just together.

  LabVIEW is a good way to program, but this kind of key options.

• How relabel case designated enum in the state machine

  Hello

  I have a state machine application in which typedef enum is used to refer to the names of the case.  Is there a faster way to rename one or more cases to match the typedef enum edited instead of having to rebuild each of them (the case structure loses all enum names if I try to edit in any way)?

  Thank you in advance,

  Oliver Barrett

  www.LinkedIn.com

  One thing to add, once your custom/constant in your block diagram control, if you decide to add a new case after case is added, you can simply go file > apply changes in the control to customize window and they will all up-to-date in your block diagram.

• How to start and stop the video capture in a state machine

  Hello

  I am a student of neuroscience and this is what I try to do: 1) trigger a camera to GigE (200 FPS), 2) start the video capture, 3) triggers a light that stays on for x milliseconds, 4) trigger a valve that will blow an air puff, 5) stop the tone and the valve at the same time and 5) stop the video capture 1 second after 4). For this, my VI is a state machine, with a State for each trigger (ex, 1 State for trigger camera 1 State of light of trigger, ect) and a statement to "stop" and a "time-out State." Everything worked except the video acquisition - the program could trigger the camera but only acquire a frame, because it was not running in a while loop and this is my first question: for an acquisition video is it always necessary to have a while loop?
  I guess the answer is Yes, so I built a loop of 'consumer' for the camera. A queue of the pre-trial 'trigger camera' in the loop of producer, I was then able to start the video capture, but now the problem is to stop it at the right time. I have an another queue in the State of 'stop' in the loop of the producer, but is not able to start the State 'stop' in the loop of consumer, I think that maybe it's because the loop of consumer gets "stuck" in the whole loop.

  I hope you can help me, the VI is attached. Thank you!

  Hello

  First of all, in your loop producer: STATE 'Stop', you use the flushing line, then there is no need to use 'item queue at the opposite end. You can use the enqueue function.

  Secondly, you said "I moved the command stop inside the while loop as you said, but it did not work. But if you look closely, you moved "Enqueue function" inside the while loop. Instead you should use Dequeue function. Please, look at the picture I posted an orderly manner.

  And remove the circled (i.e. function. Enqueue function loop of consumption, where I wrote 'Why stop here').

  Try now.

• How can I control a .vi another State machine?

  I've written a VI which is an event focused on the state machine.  Events are operator actions that take place on closing buttons on the front panel.  Each event features one or more state names on the queue of the State.  A state machine then takes the name of the State off of the queue of the State and use them to open the case, containing the functions to be performed... Now comes the desire to interact with this vi programmatically to an another vi.  Given that events cannot be triggered remotely because the keys are of type lock and cannot be manipulated by the property node (value (signal))... Is it possible to add a name from State to State in Quebec to distance... ?  It would be nice.

  I prefer not to add the buttons 'hidden' for the original vi, or perhaps to change the structure of the event.

  Is there a better way...?

  Hummer1

  You use 'Get in line' with the same name in the other VI or using a functional Global Variable to pass the reference of queues for the other VI.

  Then you write the State via 'Element of the queue' names as you would in the VI containing the state machine.

• How to easily add a State in a State Machine

  Hello

  In my project, I implement a state machine to the constant help of the Enum similarly indicated in the attached file in vi.

  It works fine, but the problem is that I need to know the number of tests (or the names of tests) initially for the copy of the Enum even again and again for each new State.

  Lets say I have a state machine with 3 States only.

  If I want to add a fourth State after the vi is not already so I have to update ALL 'States' Enums with this new State, otherwise the vi is broken. In the case of a project with a large number of States, this can be very time consuming... It seems not to be the best way to update each Enum in the vi whenever I want to add a State.

  Is it possible to update all Enums in my project at a time? Is there a better way to implement this?

  Thanks in advance,

  Mentos.

  Hi Mentos,

  See this link please.

  Mike

• State Machine with PID control

  Hi, I currently have a problem with my state machine, I control two cylinders double effect in sequence that works very well. However, there is one point I need to increase the pressure in the cylinder and to maintain this pressure through the sequence of State machine, however when the state machine transitions to the next indicate the PID controller resets, how can I solve this problem? Everything in is also allowed to apply the pressure in the cylinder another (same node IO accessed).

  Thank you I joined my project in a WinZip file, then it will have to be extracted. The two main VI to watch is 'Park Brake FPGA VI New' and 'park brake host VI update 2 "(new)

  Thank you.

  Nevermind I solved the problem with a parallel loop.

• 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

• Event structure/state machine

  Here's the scenario.

  I use the buttons controlled by the user in an event structure to control a state machine. Currently, I have a different State for each button. However, 4 or 5 of these buttons could ideally correspond to the State, which is what I would like to get... Each of these 4 or 5 buttons causes flow data and the results are stored in a table, but listened data are different for each button! Therefore, if each of those 4 or 5 buttons caused the same condition occur how I could decipher what button was pushed? Ideally, I would have 4 or 5 different paintings once all the buttons are out of the same State.

  Is there anyway that I can achieve this?

  Hi the shots.

  you have access to the refnum of the element inside the event. With the Ref, you can simply get the name or any other property of the control to distinguish them.

  Mike

• State machine pink icons

  I just started studying advice Lab, I m trying to build a state machine to a tutorial to the free rhythm. My problem is that I Don t know how to get the icon in pink inside of the case state. I've attached a file

  Thank you

  In my view, that icon Pink is a local variable for an indicator of the chain.  It is probably an older version of labview, because the icon is different now.  Right click on the indicator, Create > local Variable.  Drag the icon on any on the block diagram.  Then right-click the local variable, Create > Constant for the constant string.  It's great that you are be studious.  Good luck with your learning.

• 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 machines are well... Thanks to you all

  Thank you!!!

  For several months I struggled to learn how to use LabView, at all... much less efficiently.  With the help of the forum I was finally able to combine a display for our Lab Manager.  It was slow and unresponsive no and completely event-driven and completely unmanageable.  With the help of several key members of the forum (and I'm sure that the wishes of the rest) I learned about the State machines, queues and other good habits.

  Within 2 days, I rewrote the project as a state machine and it works beautifully.  It uses a typedef enum for the definitions of the State and a sub.vi for the variable initialization.  The BD is readable, simple, and can be seen on a single screen (almost... have to scroll down a bit to see all error.)

  I can't thank you all enough.

  Hummer 1