Modbus over ethernet

Is Modbus over ethernet available in labview?

Yes.
http://sine.ni.com/nips/cds/view/p/lang/en/nid/201711

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Communicating using modbus over ethernet

I have downloaded labviews version of the modbus drivers. I looked at the examples that are there and it says to run the slave before you can run the master example. Is there a reason for this? I want to use the master example to talk to the machine I want to interface with. If there is an issue that I am not understanding with this, can someone point this out to me. Thank you for your time.
Ron Deavers, CLD

The MB Serial Master Example VI requires you to have the slave running first so that you can have something to interact with. In theory, as long as your modbus device is running before opening the Master example, you should be OK. However I don't have a modbus device where I'm at to verify this. Have you tried just using the example with your device? If so, what's the outcome? Please let me know!
Logan S.

How to print on HP LaserJet 2200 over Ethernet?

Hi,
I did an upgrade to Snow Leopard and would like to print on a HP LaserJet 2200 over Ethernet. OS X and the HP printer drivers are up to date now.
The printer has been cold reset and on the configuration print out there's the IP address 0.0.0.0
Now my question is how to get this printer to work with Snow Leopard over Ethernet? I did not find a tutorial how to assign an IP address to the printer first so I got stuck.
Could you give me a hint where I should start with the configuration first?

OK, now the printer works
I reset the router and checked if DHPC is running.
I reset the printer (hold down the GO button, turn the printer on and continue to hold the GO button for five to ten seconds).
Checked at router that the printer is visible as network device.
At the router I assigned a fixed IP address to the printer.
At OS X System Preferences > Printer I added a new printer with "HP Jetdirect - Socket", the fixed IP address and the correct printer driver "HP LaserJet 2200".
Now the printer has been recognized well by the system (Tray 3, Duplex and printer RAM) and printing works.
THANKS.

How do I set up multiple Airport Expresses to connect over ethernet for Airtunes only?

I am trying to set up an Airtunes network using an Airport Extreme and three Airport Expresses connected together via ethernet (CAT5 cable). At each Airport Express there will be a speaker setup. I don't need/want internet connectivity on the network, but not sure if it is required for setup or not. I have made this work over wifi, using the Expresses to extend the network, but struggling to get this to work over ethernet.
I would be verry grateful of a step-by-step method to setting this up! I am also looking to set up 6 airport expresses to do the same thing in another location.
Thanks in advance!

Thanks for the info.
I assume that the AirPort Extreme is setup and working at this point.
Work with one AirPort Express at a time to get them all configured, and then you can locate them where they will be needed.
AirPort Setup will configure the Express devices to "extend a wireless network" using Ethernet, so they will be broadcasting the same wireless signal as the AirPort Extreme and provide more wireless signal coverage as well.
I have yet to meet the first person who thought that they had too much wireless coverage, but you would have the option to turn off the wireless on the Express if you wanted. Most users like having extended wireless for their devices.
Temporarily, move an Express close to the AirPort Extreme
Connect a spare Ethernet cable from one of the LAN <-> ports on the Extreme to the WAN "O" port on the Express
Power up the Express for a few minutes
Hold in the reset button on the back of the Express for 10 seconds and release. Allow a full minute for the Express to restart to a slow, blinking amber light.
Click the Airport icon at the top of the Mac's screen and wait a few seconds for AirPort Express to appear just under the listing of New AirPort Base Station
Click directly on the AirPort Express
AirPort Setup will open up automatically and take a minute to analyze the network, then announce that the Express will be configured to extend the AirPort Extreme network.
Enter a device name that you want to use....example.....Express1.....and click Next
AirPort Setup will configure everything for you. Notice that the message will say that the Express is being set up to extend using Ethernet. When you see the message of setup complete, click Done.
Now you can move the Express to the remote location where it is needed, hook it up to the Ethernet connection there, power up the Express and set up AirTunes on the device.
AirTunes is enabled by default, to other than make the speaker connection, you won't have much to do on that.
Set up other Express devices the same way, except assign a different name to each device....example....Express2, Express3, etc.....to keep things organized.

Mapping to disk on Airport Extreme's USB port from G5 over Ethernet

I just set up my Airport Extreme network, with multiple machines (Windows XP, Vista, Mac G5, iPad and iPod Touch) sharing the internet connection via both Ethernet and WiFi without any problem.
My XP and Vista machines are connected via WiFi, and I was asked to supply the shared disk's password, and once I provided it, I was able to see the drive attached to the USB port on the Extreme.
My Mac G5 is connected to the Airport via Ethernet. It never asked me for the shared disk's password, adn I could not see the drive in Finder.
Any suggestion on how to map to the shared drive over Ethernet will be greatly appreciated. Thanks! /Kenny

Any suggestion on how to map to the shared drive over Ethernet will be greatly appreciated.
It really shouldn't make any difference whether the G5 is connected by Ethernet or wireless, the AirPort Disk should be "visible" in the Finder sidebar.
If not already, be sure that you have either or both "Connected servers" & "Bonjour computers" enabled in Finder Preferences > Sidebar.

BUG: Mail (GMAIL IMAP) no longer connects over ethernet, only wireless

I too was puzzled last night when I couldn't get my gmail account to go online. I did a lot of reading, and tried various things (to no avail), but ultimately decided it was just a configuration error, or combination of other programs running...or maybe even (as read in other posts) Google's servers. I found the server problem unlikely though, since I could also log in via the web interface.
Mysteriously, opening Mail on a separate MBP over either ethernet or wireless was 100% normal...as was the imap connection on my iPad via 3G or wireless...so what was causing my brand new MBAir to choke? Sleep on it, I said to myself.
Well here I am on day 2 of Mail refusing to connect. Connection doctor always shows 'green' next to connection status (Mail was able to connect to the internet), but red for both imap and smtp servers, with messages reading "Mail could not connect to this IMAP/SMTP server. Check your network connection and that you entered the correct information in Account preferences. Also verify the server supports SSL. If it does not, deselect the 'Use SSL' checkbox in the Advanced tab of Account preferences."
I've eliminated the server issue, because my MBP still opened Mail just fine while connected to my network here at home.
Then, just for fun, I decided to unplug my ethernet (which is attached via Apple's own USB Ethernet adapter), and turn on my wireless. Almost instantly, Mail popped to life on my MBAir, and started syncing with gmail/IMAP.
In the two months I have owned this MBAir, getting Mail to work over ethernet had never been a problem. My issues seemed to parallel the recent influx of problems reported with gmail & IMAP.
I still cannot get Mail to access gmail over the USB Ethernet Adapter. What gives, Apple? Anyone else experiencing these symptoms on these new MBAirs?
Model Name: MacBook Air
Boot ROM Version: MBA31.0061.B01
SMC Version (system): 1.66f54

Turns out I was a victim of my own [tight] security. I had a SOCKS proxy enabled on my Ethernet for when I take this laptop on the road...I used it to connect securely to my server back home. Obviously at home my SOCKS proxy was not connecting from within my private network. As soon as I removed the SOCKS proxy, voilá! GMAIL IMAP works perfectly over the USB Ethernet adapter once again.
I hope this serves as a reminder to thoroughly check your network settings before driving yourself mad!
Cheers!

Choosing the Right Network Protocol for CRIO 9024 to PXI over Ethernet

We are in the design phase of setting up a CRIO 9024 Embedded Controller to send data captured to a PXIe-8105 Controller over ethernet. The data will be be 2D arrays of double precision. This data will need to be sent to the pxi at the end of each test step. Each step will have different number of channels and sample rates.
For example, Test Step 1 will have 5 channels of Analog inputs that will be sampled at 100,000 KHz for 1 second. This data will be coming from the CRIO FPGA. The data will get post processed by the CRIO 9024 and analyzed for pass or fail metrics. Then, the CRIO controller will send the 2D Array of Data (500,000 data points 5 X 100,000) and the results of all the metrics (a 1D array) to the PXI.
The connection to the PXI will be using Ethernet.
Keep in mind that the PXI will also have to send the CRIO some values to tell the CRIO when to start the test and when the test sequence is complete.
I was thinking TCP/IP would work best because of the 2 way communication needed. But then I was looking at Network Streaming or even using Shared Variables.
If anyone has any ideas or suggestions please please post them.
Spark
CLAD
Test Engineer
Solved!
Go to Solution.

Hi,
You could use either. Whichever you are more comfortable with really. The STM method will have slightly less overhead over my XML style of tagging the data but it will be very little given the data size. Probably go with STM as it just has most of the work done for you.
In terms of data size the way you should normally transfer data like this is to flatten to string. If you convert to a string of human readable numbers you will either lose precision, increase size or both. Given that, the string after being flattened will be the same size as the original array anyway so quick calculation based on your previous post 500,000 doubles (8 bytes) is 4 miB (3.8MB)
Cheers,
James Mc
========
CLA and cRIO Fanatic
wiresmithtech.com/blog

HT3231 Is it better to migrate to a new MacBook Pro using FireWire, from Time Machine, or over ethernet?

Hello,
Is it better to migrate to a new MacBook Pro (non Retina display) using FireWire, from Time Machine, or over ethernet? The older Mac is a MacBook (Intel, 2007 vintage). The Time Machine backup is to a Western Digital external drive with FireWire & USB ports.
Thanks!
Chips

Thanks for the helpful reply.
After posting, I read & researched further. We're going to be limited by the hardware – the MacBook & external drive both have FireWire 400, & we don't have a 400 to 800 cable or adapter. So we'll connect by ethernet, & be patient that it make take some time.
I have to assume that Migration Assistant will be just as comprehensive regardless of the connection method / protocol.
Best!

ITunes 7.1 doesn't recognize Airport Express over ethernet

Running iTunes 7.1 on Windows XP desktop. Immediately after update, iTunes no longer can see my Airport Express as a remote speaker (Airtunes over Ethernet).
Airport Express has the latest updates. Airport Utility has no trouble recognizing it by name. It doesn't have a password on it. The Airport is happily providing wireless for my laptop. It is my only WiFi base station, because I have a small place. It's been dependable for over a year.
I'm truly bummed, because earlier today I got a Griffin AirClick USB, and it works like a charm. I was looking forward to using it with full-screen coverflow in 7.1.
iBook G4 and assorted Win & Linux boxes Mac OS X (10.4.8) iTunes is on an XP PC

The problem turns out to be an incompatibility with Bonjour for Windows. A post by "f00fighter" over in the "iTunes for Windows Upgrade Issues" forum solved it. I quote him below:
******Quote***********
Looks like this issue is due to an incompatibility between Bonjour for Windows and iTunes 7.1.0.59 for Windows (thanks toonz!)
To workaround the issue you can stop the Bonjour Service by going to Start \ Control Panel \ Administrative Tools \ Services, then highlight the Bonjour Service and stop it. You might also want to set the Startup status of the Bonjour Service to Manual (or Disabled) to prevent the service from starting automatically the next time you restart you PC.
Note - this is only a temporary fix, and turns off the Bonjour service...so don't do this if you have other applications that rely on the Bonjour Service. A fix from Apple is needed to truly "fix" this issue.
*****End Quote**********
iBook G4 and assorted boxen Mac OS X (10.4.8) iTunes is on an XP PC

Dynamic bandwidth selection for PPPoE over Ethernet/VLAN

Hello all, hope you are doing great.
I'm planning to deploy PPPoE Server (Cisco Router 7609) for a ISP. This ISP will provide Internet connection for customer over Ethernet.
I have to provide a solution to assign bandwidth to each customer by RADIUS and I find some clues that Dynamic Bandwidth Selection (DBS) should be the answer. Unfortunately, DBS only support PPPoA or PPPoE over ATM.
If you have any experience with equivalent function, please help me. Thank you very much.
Regards,
Hiep Nguyen.

Hiep,
I think I have figured this out. Here is the test config on my PPPoE server:
int lo1
ip address 172.25.25.25 255.255.255.255
ip radius source-interface Loopback1
aaa new-model
radius-server host 172.16.1.55 auth-port 1812 acct-port 1813 key cisco$$$
aaa group server radius RADIUS-ACT
server 172.16.1.55 auth-port 1812 acct-port 1813
aaa authentication login default group RADIUS-ACT local
aaa authorization exec default group RADIUS-ACT local
aaa accounting exec default start-stop group RADIUS-ACT
aaa accounting delay-start
aaa authentication ppp default if-needed group RADIUS-ACT local
aaa authorization network default group RADIUS-ACT local
aaa accounting network default start-stop group RADIUS-ACT
aaa accounting update periodic 5
bba-group pppoe global
virtual-template 1
interface fa0/1
pppoe enable group global
ip address 172.30.0.1 255.255.0.0
no shut
interface Virtual-Template1
mtu 1492
ip unnumbered FastEthernet0/1
peer default ip address pool GLOBALPOOL
ppp authentication chap
ip local pool GLOBALPOOL 172.30.0.2 172.30.127.255
policy-map POLICE-128K
class class-default
    police 128000
policy-map POLICE-512K
class class-default
    police 512000
Here are the attributes on the radius server, for a group the PPPoE customer belonged to:
Service-Type = Framed
Framed-Protocol = PPP
cisco-avpair="ip:sub-policy-In=POLICE-128K"
cisco-avpair+="ip:sub-policy-Out=POLICE-512K"
Here is the show policy-map on the virtual-access interface the client connected on:
sho policy-map int virtual-a 3
Virtual-Access3
Service-policy input: POLICE-128K
    Class-map: class-default (match-any)
      1000 packets, 1402000 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: any
      police:
          cir 128000 bps, bc 4000 bytes
        conformed 799 packets, 1120198 bytes; actions:
          transmit
        exceeded 201 packets, 281802 bytes; actions:
          drop
        conformed 0 bps, exceed 0 bps
Service-policy output: POLICE-512K
    Class-map: class-default (match-any)
      911 packets, 1137746 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: any
      police:
          cir 512000 bps, bc 16000 bytes
        conformed 799 packets, 1136178 bytes; actions:
          transmit
        exceeded 0 packets, 0 bytes; actions:
          drop
        conformed 0 bps, exceed 0 bps
I was able to generate enough traffic with ping to meet the exceed action in and have it drop packets.

Streaming Problem - incomplete over ethernet

Hi there,
I have a problem with the streaming over ethernet from my Intel iMac, connected by ethernet to my Netgear WGR614v6 router, to my AppleTV (also connected to the router by ethernet).
My iTunes library is around 120 GBs so I have chosen to stream the majority of my content and only sync the content that I cannot stream (photos). Most of my streaming seems to be OK but bizarrely there are a couple of items that I have updated in my iTunes Library that are not reflected on the AppleTV. These appear to be quite random and are not related (as far as I am aware) to problems with encoding.
Basically I have a podcast subscription which I cancelled in my iTunes library which still appears on my AppleTV, I have a home movie (originally on VCD) in my iTunes Library which is not appearing on the AppleTV and I also have a couple of albums (encoded as VBR 250kbps .mp3 files) that are not appearing on the AppleTV.
I have re-booted the iMac various times and done 2 factory restores of my AppleTV. Is there anything else I can do? Somehow I think the AppleTV just needs to be forced to re-examine the contents of my iTunes library?
Any help or tips much appreciated.
regards
Raf

Dear Winston and capaho - thanks for your quick responses.
ROUTER - I did see some posts about issues with Netgear routers but they were all related to wireless connectivity issues. I am having no problems at all with streaming at sufficient rates and I imagine that issues with Linksys and Netgear routers pop up frequently because they seem to be ubiquitous devices for home users.
FILE DELETION - I did check that the podcast from which I had unsubscribed really was deleted (and it was indeed gone) and I did check that the albums and home movie (.mp4 file as are all of my other movie files) was indeed present in my library.
ITUNES LIBRARY.XML - I have identified this as the root of my problems because this .xml file still contains references to the old deleted podcast files and it does not contain references to the media I am missing.
It appears that iTunes Library.xml corruption is a very common problem (seeing the number of posts on the "using iTunes for Mac" forum) and that is the source of my problem.
Now to do some testing!
thanks again
Raf
UPDATE: I quit iTunes, backed up and then deleted the .xml file from my "Music" folder in Mac OS X. When I next started iTunes it created a new .xml and this seemed to do the trick!
Message was edited by: Rafael Sanchez

Share disks over ethernet WAN port

If I turn on "Share disks over Ethernet WAN port", how do I access it from outside my LAN?

On a mac well in the finder press apple key+K type in your home external ip(255.255.255.255)
On a pc windows key +r, type cmd, enter, net use k: \\"external ip(255.255.255.255)"/"the name of share"

Problem using Express over Ethernet via Solwise Gigabit Homeplug

I am hoping someone can help me here.
Similar problem with Tandie (http://discussions.apple.com/thread.jspa?messageID=12175903&#12175903). I have a Vista PC which has no problem at all to connect to my Express over ethernet. I use my Express to "Create new wireless" network and stream my itunes over ethernet, which works well if I have a cable connected to the Express to my network where my Vista PC is connected.
However, when I take my Express to another room and connect it to a Solwise Gigabit Homeplug and my other homeplug connects to my network I then seem to have problems. The homeplug works perfectly with my PS3, but my Express after about 2 hours itunes and Airport Utility is unable to find it. I can however ping the Express, but that is it.
Here's how I configured the AX:
Wireless Mode = Create a wireless network
Wireless Network Name = unique name different to my Wireless BT Hub
Radio Mode = 802.11n (802.11b/g compatible)
Channel = Automatic
Click the Internet icon
Connect Using = Ethernet
Connection Sharing = Share a public IP address
AX Firmware ver: 7.4.2
Message was edited by: Charles266

Welcome to the discussions, Charles266!
However, when I take my Express to another room and connect it to a Solwise Gigabit Homeplug and my other homeplug connects to my network I then seem to have problems.
Connection Sharing = Share a public IP address
This would be the correct setting if your AirPort Express is connected directly to a simple modem (a simple modem has only 1 ethernet port)
If you have the Express connected back to another router (it will have 3-4 ethernet ports), then the correct setting for Connection Sharing would be "Off (Bridge Mode)"
I can't say if this will solve your problem. If you continue to have issues, then test using an ethernet cable from the Express back to your main router. If this works well, then one or both of the powerline products is suspect.

Can't get ip from verizon router to iMac over ethernet

I've got an MI424WR verizon router that is running wireless fine. I also have a Apple Airport Express connected to the Verizon router via ethernet that is running in bridge mode so I can have access to all of my other Apple wireless points and printers in my house. All of this works flawlessly over wireless.
If I plug my iMac into my ethernet cable and then attempt to plug into the back of the Verizon router, I can only get a self assigned IP address on my iMac over ethernet. I've tried many suggestions on the Mac side, from using a manual IP to trashing several prefence files in the system etc. I've also tried a factory reset on the Verizon router. Nothing is working to get the ethernet working to my iMac.
I'm beginning to think it could be a MAC address issue where the Verizon router is not passing or getting something from the iMac correctly, but I have not idea how to really dig into the Verizon router settings to check this out.
Verizon support is less that useless so I'm hoping some savy network folks out there may have some suggestions for me.
thanks for any help you can offer.
Solved!
Go to Solution.

Finally a successfull update.
The crux of my problem was something to do with either the last upgrade to Yosemite or to how my Mac was loading startup items or both of these issues.
First, I confirmed that I could connect to the same ethernet cable with another Mac running one OS back from Yosemite. It connected instantly and the Verizon router passed it an ip address with no problem.
Next, I connected my iMac back to the ethernet and then booted my iMac into safemode and then made a new network location in the network prefs. I then turned off the wifi antennae and had the ethernet set to use DHCP. Renewing the DHCP lease still did not work, but once I rebooted again in safe mode with wifi still turned off, after about 5 minutes, the iMac was able to pull a working ip address from the verizon router.
All on the network side was working fine, but once I booted out of safe mode, my finder went into a horrific crash loop. After doing some cleaning of my system preferences and clearing out all startup items I am now back in business.
thanks to all who suggested ideas.

Airplay not working over wireless, works over ethernet?

I posted this in multiple forums in which it applies to.
Just looking for troubleshooting suggestions from my wireless N MBPro, to my wired ATV2. Here is the rundown (all devices running latest updates):
1)used to work just fine with old router
2)airplay works in all directions, from wireless devises to the wired ATV2
3)updated to a much newer N router from cisco
4)now, airplay works over Ethernet from itunes to ATV2 (and iphone4s to ATV2), ATV2 plays music from my MBPro just fine
5) however airplay fails to work from itunes to ATV2 over wirelesss
6)all wireless connections are sound, it is not a bandwidth problem, it literally says "connecting to apple tv" and never stops or connects
7)itunes sees the ATV2 just fine over both Ethernet and wireless connections, i can select ATV2 as an output even when on wireless
8)it will even ask for the password once i select it
So, any suggestions? I just dont know where I am going wrong, somehow the wireless aspect is the broken link. As a side note, all wireless clients and wired clients are on the same subnet.
Thanks for any suggestions or help!

I had the same problem. Disable any IGMP, or IGMP proxy features on your router. As soon as I disabled IGMP proxy on my router everything came up has been working for a while. Lack of driver support on the wireless clients is likely the cause. oh well, at least its working now.

Modbus over ethernet

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