Can more than one LV app running on different machines have open references to the same device at the same time?

I want to control a bunch of FP devices from one PC and serve this info to some satelites PC who will be on the same network. Most of the time,only the one PC will be interacting with all of the FP devices.
In the event this main PC fails, I want to be able to quickly tell all of my FP devices to go into a safe state. I have a mechanism that will tell me the main is down. When this happens, I want to write the correct state to all of the output relays.
To pull this off, I wanted all of the satelites to open FP connections to the relays that have to be driven to the safe state at starrt-up. When the failure of the main is detected, I want to be able t
o drive the relays to the correct state with a minimal amout of delay. My experiments with using FP explorer with a single PC controlling a FP device in a LV app has showed that I can write from ether place any time I wantedwith no apparent interfearence. I this same functionality available from multiple machines?
The alternative to this approach would target a watch-dog app at each of the FP controllers and have them fail-safe their outputs but this means I need to include support of RT in this app, and I was hoping to keep this simple. Each of the FP controllers would also have to be smart enough to know which if outputs should be acted on. i would alsolike some mechanism of knowing this has happened (for trouble-shooting purposes)
I thought I read this was built into FP, but that may have applied to specific devices. I am not sure.
Question:
What is the simplest approach to setting my outputs quickly to a safe state when then main PC goes down?
Thank you for reading,
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Ben,
The FP-100X, FP-160X and FP-20XX series of network modules all have communication watchdogs. The communication watchdogs are used to monitor the communications between host computers and the network module. If there are no communications within the timeout period, pre-programmed settings can be applied to each channel as desired. For proper operation, a communications watchdog has to be enabled in three locations; in the network module (enable/disable and set timeout period), in the I/O module (Enable/Enable on Use (FP-100X series only)/Disable) and on each individual channel. For relays/discrete outputs, you can program what state the channel goes to (on/off), for analog outputs, you can set the exact output value the channel goes to.
For more in
formation, please see the following tutorial. It explains in detail how the watchdogs work.
http://zone.ni.com/devzone/conceptd.nsf/webmain/FB7AABACC2BAB99686256C7E0080E60A?opendocument&node=11590_US
Regards,
Aaron

Similar Messages

  • My husband just got an IPAD and I have and I phone...Can more than one player sign in and play games on the I pad?  (Example we both play tap fish...I want to sign into the game center and play my fish tanks )  Can this be done?

    Can more than one player use the game center?  I have an I phone and my husband just got the I pad I want to play my games on his i pad can I do this?(example  we both play tap fish and tap hotel can I sign out of his login and sign into mine and play my game this way?)

    If tap fish was an app purchased by both you can do that. If you yourself just purchased it and it's on the iPad, the iPad won't let you open it under your husbands I'd.since you have the rights, you bought it, it must be your apple I'd logged in. To do that go to settings, store, taptheapple I'd..sign out and sign in with yours. The gamecenter signing out and in will only help if youwant achievements or to play with your friends.

  • Can more than one computer "supervise" an iPad at one time?

    Can more than one computer "supervise" an iPad at one time?

    Do you mean share via USB? Or connect to two different computers?
    USB can't share two connections at once like that, and for it to be connected to one, then the other, both computers need to have the same iTunes account running.

  • Can more than one apple id sign in on my tablet without deleting anything off

    Can more than one apple id sign in on my tablet without deleting anything off? Or does err1 hve 2 use ID while on my iPad?
    Message was edited by: RuEnvy35

    Another ID can be signed into on the iPad without losing anything, but it is not advisable to download purchased content with another ID, or you will lock yourself out of your own ID for 90 days.  Why don't you explain exactly why you want to sign in with another ID.

  • HT201317 can more than one person post photos to a shared photo stream?

    can more than one person post photos to a shared photo stream?

    No.  At the present time, only the person creating the shared photo stream can add or delete photos.

  • HT1719 Can more than one device access the same ITunes library?

    Can more than one device acess the same ITunes library?  And if so, does each device's list of songs remain separate and distinct for each device?

    No problems whatsoever. I have 3 iPhones and 3 iPod touches with different IOS connected.

  • HT1595 Can more than one computer be connected to the Apple TV at the same time?

    Can more than one computer, etc. be connected to the Apple TV at the same time?

    If you are referring to home-sharing then yes, as long as they are all using the same home sharing ID

  • HT204053 for some reason i have more than one apple id, not sure how, must have set one up ages ago and forgot about it. can i delete one, or merge them? how do i know im not going to lose info if i delete one account?

    for some reason i have more than one apple id, not sure how, must have set one up ages ago and forgot about it. can i delete one, or merge them? how do i know im not going to lose info if i delete one account?

    You can neither merge or delete them. Pick one and stop using the other. If they both have purchases associated with them you will have to keep using both.

  • How many sign-on's are included when I purchase Photoshop and Illustrator? Can more than one person have access on separate computers?

    How many sign-on's are included when I purchase Photoshop and Illustrator? Can more than one person have access on separate computers?

    You have 2 activations and the licenses is tied to you personally and you only. You cannot let other people use your software (unless they are family).
    Mylenium

  • Can more than one email get a copy of the form filled out

    Can more than one email get a copy of the form filled out?  Not a link but the data from the form.

    I have the copy of the form coming to my main email but I need it to go to a second email address.  right now the 2nd email address only gets a link.  I do not want them to have access to the account only to get a copy of the data.  I have them set up under Email Notifications as a "reader".

  • Can more than one action be maintained on same day?

    Hi
    Can more than one action be maintained on same day?
    Charlene

    Hi,
    SPRO -> PM->   PA->CUSTOMIZING PROCEDURES->  ACTIONS-> SETUP PERSONNEL     ACTIONS-> PERSONNEL ACTION TYPES. In this step check under both "U & U" columns for that particular action.
    •     Activate additional action infotype P0302 in T529A table.
    You can do two actions on the same day without changing employment status.
    •     Cause and prerequisites
    You use the functions 'Additional actions' (infotype 0302) (that is, flag ADMIN EVSUP = 1 in table T77S0). If you delete or shift a created personnel action type 'Leaving' and then create a new personnel action without leaving the transaction, on the list screen of infotype 0000, the system does not display the last but one personnel action.
    Solution
    To correct the display problem, start report RPUEVSUP for the affected personnel number. Then check Customizing of the personnel action types (table T529A), since the report sets indicator U0302 (update of infotype 0302) active for all personnel actions.
    •     RPUEVSUP --- Activation Program for Additional Actions (0302).
    Pls reward suitable points.
    Regards,
    IFF

  • Can more than one laptop use a wireless network at a time?

    Hi...quick question and this may be a stupid one .. but a few months ago my uncle was living with us and had a laptop which had a wireless Internet connection. I had already had my Ibook set up and was using a wireless Internet connection. When he turned on his mine stopped working? Why was that happening? Also ... my dad is buying my mom a laptop for Xmas and I'm sure that it will have a wireless connection as well? I'm hoping that same thing will not happen again. Why would the wireless router only read one laptop in the same house? Aren't wireless routers suppose to read more than one computer? I just don't want my MAC to be unable to use the Internet once another laptop is in our house. Does anyone have any suggestions? Thanks a ton!
    IBook   Mac OS X (10.4.8)  
    IBook   Mac OS X (10.4.8)  

    Karen, welcome to the discussions.
    Using a wireless router will enable you to connect upwards of 50 computers all at the same time and simultaniously.
    Take care to read the set up procedure for the particular Wireless Router you are using for your Network.
    There are several different ways to confiqure a wireless Network.
    AS long as all of the computers you have, do in fact have wireless cards in them you shouldn't have a problem.
    There is a difference in the set up for PC and a Mac.
    There is also a difference in Wireless Routers and there capabilitys, some are for older wireless 802.11b compliant systems. Whereas the newer Routers or Base stations are for both older 802.11b and the newer 802.11g connections.
    They will say 802.11b/g or something close.
    Most will require you connect your Internet Service Providers Modem to the WAN Port of your choice of Wireless Router. Like I said follow the directions.
    Good Luck
    Don

  • How to load and unload more than one external swf files in different frames?

    I do not have much experience on Adobe Flash or Action Script 3, but I know the basics.
    I am Arabic language teacher, and I design an application to teach Arabic, I just would like to learn how to load and unload more than one external swf files in different frames.
    Thanks

    Look into using the Loader class to load the swf files.  If you want to have it happen in different frames then you can put the code into the different frames.

  • How to multiple/ parellal sets of books to generate more than one financial statement based on different (or the same) accounting principles.

    How to multiple/ parallel sets of books to generate more than one financial statement based on different (or the same) accounting principles.
    My Client needs Parallel Ledger in SAP B1 similar like SAP ECC. Is this functionality available ?

    Dear Mr. Nagrajan,
    Thank you for your response. I have already gone through documents but not able to understand. Is there any setup for this ? or its just work around i.e. using template and special field in JV i.e. Ref. 1 /2
    My doubts :
    I understand that Chart of Account structure is one and common for IFRS and other accounting method. We need to create only those account separately ( 2 times with prefix like IFRS revenue account, GAAP Revenue account).
    Now at time of entry, Assume some entries / adjustment are specifically for IFRS and not for other ledger. In this case, What need to do ?
    You have mentioned about DTW approach but do we need to insert all JV's again with other ledger ?
    Someone suggested that if any entry which are specific to IFRS Ledger, We need to user Ref.1 /2 column or Transcation code column and in which we can put IFRS
    Based on this, Need to create 2 seperate template for IFRS and other ledger for all report.
    This is my understanding of Solution in SAP B1. Please help me to clarify my though process
    Please do needful.If you have done implemenation and if you can share doucment, it would be great help.
    Email :[email protected]

  • HT4976 Can you use more than one emoji app?

    Can you use more than one emoji pp on the iPhone 5?

    All the emoji apps have been removed from the App Store because the Emoji keyboard is now accessible in all iPhones (since, I believe) iOS 5.
    Settings>General>Keyboard>Keyboards>Add New Keyboard.
    There is no need for a separate app.

Maybe you are looking for