Using MB Ethernet master VI with multiple Modbus devices

Hi,
I am not sure if this is the right place to ask this question; hope I'll get some help anyways. So, I basically have couple of Watlow EZ-ZONE PM controllers with ethernet and ModBus/TCP support. I am trying to talk to each of them using the MB ethernet Master Query VIs. However, since I need to talk to them simultaneously, I have them hooked up to my router. However, in that case, I am not being able to use the open TCP connection VI anymore, as there is no port no. to specify for that VI. I tried creating new VISA-TCP/IP resources through MAX, but i'm not sure how to use the VISA VIs to interface with the ethernet master VIs, as the latter need TCP refnums. Can anyone suggest some alternative in this case? Sorry, I am pretty naive about the networking features in LabVIEW and so any help would be appreciated.
Thanks.

If you have multiple devices on the network that you are trying to communicate with, they all need to have unique ip addresses. You mentioned port number, but if your devices use the modbus, the port number have to be the same, which is 502.
Yik
Kudos and Accepted as Solution are welcome!

Similar Messages

Using the opmn:ormi protocol with multiple nodes

Hi
If I use the opmn:ormi protocol with multiple nodes, will it load balance between the nodes or will it simply try to connect to the first node and if it can't it will connect to the second node?.
Instead of specifying multiple nodes can I set the host to point to a load balancer?
Which solution is best?

repost

How can a calender be synced with multiple apple devices

how can a calender be synced with multiple apple devices so that all the users can be able to access the calender and also the entries done by one of them?

Hi Muneshdm,
Welcome to Apple Support Communities.
See these articles for information on setting up iCloud on multiple iOS devices, as well as how to share calendars:
iCloud: Set up iCloud on your devices
http://support.apple.com/kb/PH2609
iCloud: Share a calendar with others
http://support.apple.com/kb/ph2690
Best,
Jeremy

Using a seagate external drive with multiple macs

i got a 1TB seagate external hard drive for backup and transfer purposes... it had a little program to help set it up and i set it up for use with mac and pc ( only onther option was stricty this computer.) it works on my computer and a pc but when i tried transfering files from another older mac i have it showed that i could only read on that computer...
how can i get it to work with multiple macs...?

I have the oldest macbook (1.83. 2 gigs ram, 60 gig internal hard drive)
I have all my logic content on my external maxtor firewire 400 drive (usb 2.0 is actually faster than firewire 400) and everything is fine. the good thing is if your external drive has 7200rpm, but the ones with 5600rpm should do as well.
Once you drag your apple loops to logic from your external drive, logic will remember for the next visit. And when you are opening a project which is on the external drive , just find it with logic finder and all should be fine.

Any possiblity to use single Inbound Service Interface with multiple Receiver Agreements

Hi All,
Scenario: PROXY to FILE.
Requirement is to receive to two locations.
Is it possible to use single Inbound interface with multiple Receiver Agreements. I tried using two operation in the Inbound Service Interface, and Operation Specific in Determination. But couldnt proceed further. Do I need to use seperate Service Interface for two receiver locations?
Please suggest some solution.

Hi Naveen,
There is a possibility but in the case in the same server location with dynamic configuration: Placing file in two different directories using single receiver communication Channel
With different location you would need to develop a new adapter module as Amit Srivastava explains and develops here Send File to Two Different Locations using Adapter Module
Regards.

Can you use the same Apple ID with multiple iMac's?

I am a teacher and I have multiple iMac's in my room and I need to be able to purchase apps one time and have them on all my computers. Is this possible? I know that I can do it with multiple iPad's but can I do with iMac's?

Yes logon to each computers itunes and away you go.
To redownload on each itunes got to the itunes store, select Purhased from the quick links section and navigate to what you want to redownload.
If you want to do it for apps that run on the Macs not on the iPad you need to login to the Mac AppStore and login with the same apple id and download apps that work on macs

Using LR CC/LR Mobile with multiple computers

Is there a way to see files synced with LR CC on my iMac using LR CC on my MacBook, the same way I can see them using LR Mobile on my iPad/iPhone?
My iMac has my main library in a RAID array, but I take my laptop everywhere, and would like the ability to do more than the basic sort and organise that Lightroom on the Web allows me, using the same smart previews that my mobile devices can access.
Currently I can do more editing on my iPad than I can on my MacBook, and that can't be correct...
Is there any possibility for this?
Bonus points if I can add raw files back in, but I can't see how that would work.

axlaxeman wrote:
Currently I can do more editing on my iPad than I can on my MacBook, and that can't be correct...
Bonus points if I can add raw files back in, but I can't see how that would work.
That's pretty well correct. I agree with you though - one of my first questions was whether I might be able to run LrMobile on my laptop.
One thing you may not have noticed is that on your laptop you can add new files to your main catalogue by dragging and dropping into the LrWeb browser window. The originals are uploaded and will appear in your synced catalogue. You can also download a large JPEG by going into an image's comments pane on the right and on the Photo Info tab is a "Download large JPEG" button. Now, put these together and you can download the large JPEG, work on it and save your changes, then upload it by dragging and dropping into the browser.
The external drive suggestion might be more viable if you take the catalogue and smart previews for images you might need (don't worry about the regular previews). I want access to large numbers of pictures when I go away for a period. So I have a smart collection to find photos that should have smart previews - the criteria are images that don't have smart previews and are recent or >3 stars or from the area where I'm planning to travel etc. I'll then make smart previews of anything that shows up in the SC. When this shows zero, I know I have all the pictures I may need during the trip and will be able to do things like send out pictures, research locations, copy metadata etc.

Handshaking DMM with multiple Switch devices - DAQmx error

Hi.
I'm trying to create a handshaking loop with DMM (PXI-4071), SWITCH (PXI-2569) and MUX (PXI-2575). All three instruments are in segment 2 of PXI-1045 chassis (slots 8, 9 and 10) and I am using PXI trigger lanes to route triggers.
I followed the NI article 'Multi-module Scanning with National Instruments Switches' - I modified the NI SWITCH example 'niSwitchDMMSwitchHandshaking' to configure the other SWITCH but when I tried to run the example, I got an error:
0xbffa6b9a - No registered lines could be found between the device in the route. (pop-up screenshot is in the attachment). It is the niSwitch_InitiateScan function for the second Switch that returned the error.
Changing PIX trigger lanes has no effect.
I tried both CVI and LabVIEW examples with the same result.
I even tried to use two 2575 MUXes - same result.
Can anybody tell me what am I doing wrong?
Solved!
Go to Solution.
Attachments:
errror1.JPG ‏26 KB

Hi Pavel,
For the purposes of this post, I'll define
the measurement complete signal (sent by the DMM to the switch modules
after each measurement) as 'MC' and place it on TTL0.
For the
purposes of this post, I'll define the scan advanced signal (sent by the
switch module(s) to the DMM once the relays have settled) as 'SA' and place
it on TTL1.
You mentioned you're using NI-Switch, which is NI's IVI
compliant switch API. Since the IVI Foundation regulates the behavior
of IVI compliant software, we must adhere to their rules when
implementing our API. Unfortunately, the IVI switch standard doesn't
provide a method to control arbiting of triggers between multiple switch modules
simultaneously.
Let's
look at what happens when we setup a system with multiple switch
modules handshaking with a single DMM. The DMM is going to take a
measurement and then send MC on TTL0. Meanwhile, each switch is listening to TTL0,
waiting for the MC pulse. When the MC pulse is received, each switch sets
the relays according to its next scan list entry, waits for debounce,
and then sends SA on TTL1. The problem we run into here is that depending on the switch module, number of relays connected simultaneously, jitter, etc, it's possible that one module will send the SA trigger on TTL1 before the other. Since the IVI spec doesn't provide any way to implement a 'master' switch or an arbitor, it's impossible to implement a system such that only the last switch that settles sends a trigger. Therefore, what happens is we get a whole bunch of switch modules sending triggers at slightly different times onto TTL1. If one switch is driving TTL1 high while the others are driving TTL1 lo, it's remotely possible that we could damage the TTL circuitry on the PXI backplane.
To date, NI hasn't seen any failures due to simultaneously driving the TTL lines high and low at the same time with NI switch hardware, but it is theoretically possible that damage could occur. For this reason, NI implemented a change in DAQmx
9.0.0, 9.0.1, and
9.0.2 that prevents a user from setting up handshaking with multiple switch modules while using NI-Switch. What does DAQmx have to do with this, you might ask? A component installed with DAQmx is responsible for verifying the triggers are valid.
Customers with existing NI-Switch multi-module handshaking applications will find that upon upgrading to any of the above three versions of DAQmx, the error you observed will occur. We've evaluated this customer feedback and have decided to revert to the previous functionality in a yet-to-be released version of DAQmx. Please note that NI does not advise driving the same TTL line with multiple sources due to the chance that we'll double-drive the line. Therefore, it goes with out saying that NI does not advise using NI-Switch in multi-module handshaking applications. We do, however, still recommend NI-Switch for Syncrhonous triggering because the switches never send triggers (in synchronous mode, the DMM just waits a predefined amount of time before switching).
Note that if you use the DAQmx Switch API, we're no longer bound to the IVI spec, which means we have an arbitor that ensures only one switch module drives the SA trigger on TTL1. NI highly recommends that customers evaluate using the DAQmx switching API for multi-switch handshaking applications. An example DAQmx handshaking application for the DAQmx Switch API is located in Example Finder»Hardware Input and Output»DAQmx»Switches»Switch Scanning with DMM - Handshaking.vi.
Note that in DAQmx, we'll only have one scan list, regardless of the number of switches we have. Note that the syntax in DAQmx scanning is different than NI-Switch. I'll defer a detailed explanation of the differences to the DAQmx and NI-Switch Help (search for 'scan list'), but in short, we'll need to include the DAQmx Device name prior to each connection. For example, in NI-Switch, if we want to connect CH1 to Com1:
CH1->Com1;
In DAQmx, we'll need to include the Device name:
Dev1\CH1->Com1;
Note that to add additional switch modules in the DAQmx API, we simply
call the Set Topology and Reset VI multiple times:
DAQmx keeps the
session loaded in memory and as I noted above; we define which switch
does the action as part of the scan list entry.
If you'd still like to use NI-Switch, you could roll back to DAQmx 8.9.5 or previous, or if you want to stick with 9.0.x, I highly recommend that we daisy chain the triggers as follows:
DMM Measurement Complete to Advance Trigger on Switch1 via TTL0
Scan Advance from Switch1 to Advance Trigger on Switch2 via TTL1
Scan Advance from Switch2 to Trigger Source on DMM via TTL2
Note that we'll need an additional TTL line for each switch module. Also note that some switch modules allow front panel triggers, which reduces the number of TTL lines we'll need on the backplane, but which requires external wiring between switch modules.
Message Edited by Knights Who Say NI on 06-11-2010 05:25 PM
Message Edited by Knights Who Say NI on 06-11-2010 05:30 PM
Message Edited by Knights Who Say NI on 06-11-2010 05:30 PM
Message Edited by Knights Who Say NI on 06-11-2010 05:31 PM
-John Sullivan
Analog Engineer

Screen ipad doesn't respond during video viewing home sharing with multiple iOS devices simultaneously

A have a problem with the videos app and iTunes home sharing on multiple iOS devices.
This is my setup. On my iMac 2006 with Snow Leopard I have:
- 100+ dvd's ripped in my iTunes movie section
- 600+ episodes ripped in iTunes TV-section in 35 TV-shows
- 1 apple tv, 1 iPad 2, 1 iPad mini
On an average evening my family is watching different tv-shows simultaneously on the apple tv, the ipad, an iphone, and an ipad mini.
This is done through home sharing on the one iTunes library.
All updated apps, software etc..
What happens on the ipads, after viewing for more than 10 minutes, the user interface doesn't show up when tapping the screen. The touchscreen doesn't respond, only the home button works. Clicking the home button closes the app, but the sound of the video keeps on playing. Opening up the videos app again gives a black screen with sound still playing and still no button or UI.
The only workaround which currently works is killing the videos app. Power off the ipad and power on again, reconnect to the shared library, wait until it has found all the content (1+ minutes) and startup the tv show again.
All in all, a nasty way to pause your viewing or switching to another movie of tv episode, or even wanting to finish viewing.
The problem has haunted me for a year now, patiently waiting and hoping software-updates would fix it. They didn't.
A fix would obviously hugely improve my user experience, getting it on par with Apples usual quality of service.
Anyone familiar with this problem? Apple: is it possible to fix it in an update?

Same here for over a year now.
You cant imagine how happy i am that im not the only one with this problem.
many of frinds have the same setup as me (ipad 2, 27"imac, express, apple tv 2)
No problem
I had the problem on Snow Leopard, lion and now on mountain lion.
I'am also starting to get a new problem - sometimes when waching a movie on iPad or ATV it just quits the movie and you have to start it again
on the iPad most of the time it also shows the wrong cover art. I tried all the hints here, and i works for a day or two then its wrong again
I store my itunes library on an external drive - you ???

How to sync ical with multiple apple devices and android?

Does anybody have use an android phone in addition to apple devices, and have you figured out how to sync ical with all? (I know there are other calendars that can be used by all, but it means a lot to my husband to stay with ical.)

I tried Yahoo in the past but had trouble with duplicate entries. However, this was a while ago before Yahoo updated their site and this was with syncing to a Windows computer with Outlook in addition to a Mac so my results might not be typical. Yahoo's worth a shot, but my experience with Yahoo is why I use Google Calendar.
Beyond that, I don't know of any other "free" services. There are many other hosted calendar sites that could work, but you'd pay something like $5-$20 per month, which is comparable to MobileMe.

How can I create a "master" document with multiple variations?

I designed a map that will be posted at a few dozen junctions with a "you are here" symbol. Every one will be identical with the exception of this symbol. I don't know if there is any way to do this while preserving a "master" map that can be edited all at once. For example, I may need to change the location of the paths and it would be a real time saver if I didn't have to edit 20+ files (each with an arrow in a different spot but otherwise the same) separately. Also, I will be sending the file over email to a professional printer, so I am very uncertain about what would be a standard way to format something like this and really wouldn't want to clog their email.
I haven't been able to figure out an easy way to do this. I'm wondering if it involves using multiple artboards, a feature that I'm not very familiar with, or if the easiest way is to have a layer for each symbol location and just save twenty files (whew) and send them to the printer as separate documents - which seems super clumsy.
I have tried copying the artboard multiple times. This was my best attempt at editing all at once: I created whatever I needed on one artboard, then dragged it to the symbols panel, then cut, then went to edit > paste on all artboards. However, this doesn't allow me to simply fiddle with a path or object that already exists and I can't figure out how I would delete the same object from all artboards.
If anyone has some thoughts, I'm pretty novice, so please keep it in simple terms. Also, I am in a bit of a time crunch, so speedy answers are much appreciated! Thank you!

Alright, that makes sense. And yep...I've never worked with a professional printer so I wasn't sure if it is standard to have something that will require that much involvement in the set-up on their part, but I guess it's preferable to sending a bunch of separate documents. Thanks so much for your help, Larry!

How to use one I-tunes library with multiple windows users (family) on 1 pc

On our family pc we log in with different accounts. We want to use I-Tunes but all have the same library. I tried to create a library not in the users directory, but in the All Users folder that is accessible for everyone. However, when I import the music in the library for one user and set the same location for another user, I-tunes does not recognize the library. So everyone has to create it's own library.
What are the best practices to overcome this?

Keep in mind that what you have done now is you have multiple iTunes libraries accessing the same media folder. Meaning, that each account can have their own ratings, playlists, etc. but more importantly, each account does NOT know what the other account does, so if your daughter adds a CD to her account, it will go into the shared folder, but it will NOT automatically go into your wife's iTunes library. She would have to add it manually. Likewise, if one account deletes music from their library and tells iTunes to remove it to the trash, the other accounts will not know and iTunes will still try to access the file from the shared location even though the file is now trashed.
Each account has their own database files (.itl files in the iTunes folder) which stores this stuff.
If you want to have everyone use the exact same library which means the same ratings, playlists, etc. then you need to move the database files into that same location and set each iTunes account to read the same data.
How to open an alternate iTunes Library file or create a new one
http://docs.info.apple.com/article.html?artnum=304447
Patrick

How do I go from using a single Apple ID with multiple libraries to using home sharing?

Until now my wife and I have opted to share our iTunes/Apple ID and use multiple libraries to manage our iPhones. This has become increasingly difficult...with issues such as having apps I've downloaded that she doesn't want automatically downloading to her library and even her phone. Now, add in the fact that I want to continue to manage my iTunes library from our PC and allow her to manage hers from her new MacBook Pro and we have good reason to move to home sharing with separate Apple IDs for each of us.
My question is the logistics of doing so. Not only do we need to replicate her existing library on a new Apple ID, but then we need to migrate all the necessary files over to her MacBook Pro. Quite honestly, I don't even know where to begin. Is it possible to associate her existing library with her new Apple ID without having to create her library from scratch? Then is there anyway to migrate only the items in her library over to her MacBook Pro as opposed having to move all of our music & apps? Where do I begin?
Thanks!

Okay...I misunderstood and thought we needed separate ID's...but I see we actually need to use the same ID which simplifies things in my mind a bit. But still some followups...
1) What do you mean by restore the library on her computer? Simply open her library file in iTunes?
2) On our current machine...media is actually split between a couple folders but all under the My Music folder. But there are multiple subfolders (iTunes, Her iPhone, and Amazon MP3). I presume as long as I copy over the entire My Music folder there shouldn't be any access issues when the library is opened on her machine?
3) Is there any easy way to get rid of all the extra files that she doesn't have in her library? For instance, all my music and apps that she doesn't actually want, is there any easy way of separating those out from the files that are actually linked to in her library? Vice versa for me...once we've go her library set up on her machine, any easy way to purge all the extra files from my PC that aren't actually in my library?
Thanks!

Using a single itunes library with multiple iphones?

My wife got an iPhone 3GS recently and I already have a 4S. I plan to use an existing iTunes install on a single PC to manage them both. I see that Apple support articles say it's worth keeping iTunes libaries separate (with separate Windows user accounts) when there are multiple iPhones using iTunes on one PC.
I like to manually manage music, videos and podcasts in my iTunes library rather than use synching. I like the idea of having a shared pool of music, videos and apps for us both to use. I know apps that are purchased on my iPhone or my wife's are linked to a specific apple ID so that means if she transfers any apps that were bought on my phone originally, her phone will ask her for my apple ID password when they get updates. But sharing passwords with eachother isn't a problem.
I can create a second user account for my wife easily, but I kind of have the feeling I'd prefer to share a single library as I say.
Are there any other reasons I need to keep 2 user accounts and 2 iTunes libraries going when I manually manage the transfer of content?
Cheers.

MikeBelfast wrote:
I can create a second user account for my wife easily, but I kind of have the feeling I'd prefer to share a single library as I say.
Adn this can easily be done.
Move your /Music/iTunes/ folder to a Shared directory (such as /Users/Public/ folder) and everyone can use this single library.
Each user must quit iTunes before the other can open it.
Just hold Shift, launch iTunes, select Choose library... and select the iTunes folder in the shared directory.
The big advantage with separate Windows user accounts, data such as photos, calendars, emails, and everything else will be separate.

Is there any information about using iCloud on a Mac with multiple user accounts (Mountain Lion)

When upgrading to Mountain Lion, you are asked to sign in using your iCloud ID. I don't understand how to set up the proper synching of "stuff" if your Mac has multiple user accounts, and they each have their own iCloud ID.
The whole issue of supporting multiple users on a Mac and making everything easy to understand with regard to iTunes and iCloud is, in my opinion, currently in a state of disaster. Apple needs to address this. They have conveniently made it a non-issue on iPads by not allowing multiple users. I can tell you that as one of the resident iOS and Apple experts in my office, most of the questions I get from others (not work-related) are on this topic. It needs to be easier to understand and accomplish.
Thanks in advance for any information you have on this subject.

CS7981 wrote:
is "Is there any benefit to using my Airport Express with my wireless router
no.

Using MB Ethernet master VI with multiple Modbus devices

Similar Messages

Maybe you are looking for