Master/multiple slave design example
Can someone please post an example of the master/slave design with multiple slaves. I cannot get the second slave loop to start.
Thanks.
metzler CLAD
Yes, you are correct that the default master/slave uses notifier, not queues.... my mistake.
Deciding weather you use master/slave or producer/consumer is important since there are some differences between queues and notifiers:
a) Notifier can loose data, queues only unlikely (if they do, they are configured in a wrong way or the system is already messed up!)
b) Queues should not have more than one reader but can have unlimited number of writers
c) Notifiers should have only one writer, but can have unlimited readers
In the screenshot PNT attached, the slaves will run in parallel and (hopefully) will be kind of synchronized. If you dont like that, you can add different timings to both loops, which can(will) lead to loss of data.
Regarding your requirements, i think you will better use producer/consumer (so my answer wasn't too bad.... ) since i asume that you do not want to loose data!
And if you choose producer/consumer, please note my hints from the first post...
hope this helps,
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.
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Example of how to create a master-multiple detail PDF report using BI Pub
Hi,
Are there any examples out there on how to do this? Basically for each master record from table A,
need multiple related detail records from table B AND multiple related detail records from table C.
Ie. A is master to B and A is master to C.
For master-single detail reports, writing a single query that joins master to detail works fine,
but for master-multiple detail reports, I don't see how this approach will work.
Thanks,
JedYou MIGHT have a better response if you ask this question in the BI Publisher forum...: BI Publisher
Thank you,
Tony Miller
Webster, TX
There are two kinds of pedestrians -- the quick and the dead. -
Multiple errors with DSC modules modbus master and slave
Hi,
I've searched quite a lot of posts but haven't found solution for my problem. I'm playing with LabVIEW DSC module and it's modbus master and slave functionalities. Even the LabVIEWs own modbus examples (Modbus Simulator and Fundamentals) seem to work randomly or not at all: When checking the Variable Manager utility Modbus Simulator (i.e. modbus slave/server) seems to deploy variables correctly with good quality but Modbus Fundamentals (i.e. modbus master/client) most often shows unknown value or bad quality for all the variables. When running the VIs I get 'Error -1950679035 Unable to locate variable in the Shared Variable Engine' and sometimes some other errors too. If the Modbus Simulator (slave/server) is expected to work fine I guess I should get two slaves communicating, but this isn't happening either. So maybe Modbus Simulator example isn't working either.
I've tried undeploying and deploying the libraries, stopping and starting the SVE, booting PC, reinstalling DSC module, and setting firewall and antivirus software off. This problem is going on with two different computers, both of which have recently installed LabVIEW 2011, first PC with Win XP and second PC with Win 7. No other OPC servers should be installed to these computers. And what is really interesting, the problem seems to have nothing to do with my network since Simulator and Fundamentals examples are not working even if the network cable is unplugged!
Any suggestions? Replies are highly appreciated!V8 has the same feature, but the words are different.
The Generator typically uses the Driver time base, and the Gl. Var Write is writing once per block.
So, to see all values, you must have a block size of one.
I set up the Driver timebase to 10 Hz, block size of 1. The Generator and the Read Variable default to the Driver timebase.
The Generator is making a 2 Hz Rectangle waveform. YOu can see that it's shifted, but otherwise intact.
- cj
Measurement Computing (MCC) has free technical support. Visit www.mccdaq.com and click on the "Support" tab for all support options, including DASYLab. -
I'm having problems with my Master and slave loop combination. I would like to be able to start and stop acquiring data from individual thermocouples. Please help.
Message Edited by nicholas03 on 04-13-2008 03:22 PM
Attachments:
eight thermo.JPG 106 KBDear Nicholas,
My first advise would be to check the examples on master-slave patterns, and run them step by step, looking at what the data does...
In a master-slave system, you use the queue to pass data from the master to the slave. You're not passing data in the queue... in stead, you're passing data using local variables, which you should NOT do...
In the top loops, you should attach the temp array to the enqueue element. In the bottom loop, you should remove the temp local, and instead get your data from the dequeue vi.
Also, you have to create a queue with the proper variable. You can create a queue from any variable type, but it has to know beforehand, and the init vi.
Assuming you want to queue the temp array, you're basic structure should look like this:
It does help if you add your own code, so we can easier edit it for you... Otherwise we need to use photoshop on your design...
Message Edited by Anthony de Vries on 04-14-2008 11:30 AM
Attachments:
master-slave1.JPG 24 KB -
Insert into two tables, how to insert multiple slave records
Hi, I have a problem with insert into two tables wizard.
The wizard works fine and I can add my records, but I need to enter multiple slave table records.
My database:
table: paper
`id_paper` INTEGER(11) NOT NULL AUTO_INCREMENT,
`make` VARCHAR(20) COLLATE utf8_general_ci NOT NULL DEFAULT '',
`model` VARCHAR(20) COLLATE utf8_general_ci NOT NULL DEFAULT '',
`gsm` INTEGER(11) NOT NULL,
PRIMARY KEY (`id_paper`)
table: paper_data
`id_paper_data` INTEGER(11) NOT NULL AUTO_INCREMENT,
`id_paper` INTEGER(11) NOT NULL,
`value` DOUBLE(15,3) NOT NULL,
`nanometer` INTEGER(11) NOT NULL,
PRIMARY KEY (`id_paper_data`)
I need to add multiple fields "value" and "nanometer"
Current form looks like this:
Make:
Model:
Gsm:
Value:
nanometer:
I need it to look like this:
Make:
Model:
Gsm:
Value:
nanometer:
Value:
nanometer:
Value:
nanometer:
Value:
nanometer:
and so on.
The field "id_paper" in table paper_data needs to get same id for entire transaction. Also how do I set default values for each field "nanometer" on my form the must be different (370,380,390 etc)?
Thanks.you can find an answer here: http://209.85.129.132/search?q=cache:PzQj57dsWmQJ:www.experts-exchange.com/Web_Development /Software/Macromedia_Dreamweaver/Q_23713792.html+Insert+Into+Two+Tables+Wizard&cd=3&hl=lt& ct=clnk&gl=lt
This is a copy of the post:
Hi experts,
Im using ADDT to design a page that needs to insert one record into a master ALBUMS table, along with three records into a GENRES table, all linked by the primary, auto-incremented ALBUMS. ALBUM_ID.
Ive tried many different ways of combining the Insert into Multiple Tables wizard and the insert record wizard with Link Transactions, all with no luck. Either only the album info gets inserted, or a ALBUM_ID cannot be null error from MySQL. Here is the structure of the tables
ALBUMS
ALBUM_ID, INT(11), Primary, Auto_Increment
alb_name, varchar
alb_release, YEAR
USER_ID, int
alb_image, varchar
GENRES
ALBUM_ID, int, NOT NULL
GENRE_ID, int, NOT NULL
ID, int, primary, auto-increment
Many thanks in advance...
==========================================================================================
//remove this line if you want to edit the code by hand
function Trigger_LinkTransactions(&$tNG) {
global $ins_genres;
$linkObj = new tNG_LinkedTrans($tNG, $ins_genres);
$linkObj->setLink("ALBUM_ID");
return $linkObj->Execute();
function Trigger_LinkTransactions2(&$tNG) {
global $ins_genres2;
$linkObj = new tNG_LinkedTrans($tNG, $ins_genres2);
$linkObj->setLink("ALBUM_ID");
return $linkObj->Execute();
function Trigger_LinkTransactions3(&$tNG) {
global $ins_genres3;
$linkObj = new tNG_LinkedTrans($tNG, $ins_genres3);
$linkObj->setLink("ALBUM_ID");
return $linkObj->Execute();
//end Trigger_LinkTransactions trigger
//-----------------------Different Section---------------------//
// Make an insert transaction instance
//Add Record Genre 1
$ins_genres = new tNG_insert($conn_MySQL);
$tNGs->addTransaction($ins_genres);
$ins_genres->registerTrigger("STARTER", "Trigger_Default_Starter", 1, "VALUE", null);
$ins_genres->registerTrigger("BEFORE", "Trigger_Default_FormValidation", 10, $detailValidation);
$ins_genres->setTable("genres");
$ins_genres->addColumn("GENRE_ID", "NUMERIC_TYPE", "POST", "GENRE_ID");
$ins_genres->addColumn("ALBUM_ID", "NUMERIC_TYPE", "VALUE", "");
$ins_genres->setPrimaryKey("ID", "NUMERIC_TYPE");
// Add Record Genre 2
$ins_genres2 = new tNG_insert($conn_MySQL);
$tNGs->addTransaction($ins_genres2);
$ins_genres2->registerTrigger("STARTER", "Trigger_Default_Starter", 1, "VALUE", null);
$ins_genres2->setTable("genres");
$ins_genres2->addColumn("GENRE_ID", "NUMERIC_TYPE", "POST", "GENRE_ID2");
$ins_genres2->addColumn("ALBUM_ID", "NUMERIC_TYPE", "VALUE", "");
$ins_genres2->setPrimaryKey("ID", "NUMERIC_TYPE");
// Add Record Genre 3
$ins_genres3 = new tNG_insert($conn_MySQL);
$tNGs->addTransaction($ins_genres3);
$ins_genres3->registerTrigger("STARTER", "Trigger_Default_Starter", 1, "VALUE", null);
$ins_genres3->setTable("genres");
$ins_genres3->addColumn("GENRE_ID", "NUMERIC_TYPE", "POST", "GENRE_ID3");
$ins_genres3->addColumn("ALBUM_ID", "NUMERIC_TYPE", "VALUE", "");
$ins_genres3->setPrimaryKey("ID", "NUMERIC_TYPE");
=========================================================================================
Hi Aaron,
Nice job!!
$ins_albums->registerTrigger("AFTER", "Trigger_LinkTransactions2", 98);
$ins_albums->registerTrigger("AFTER", "Trigger_LinkTransactions3", 98);
These lines, right? :-( Sorry I forgot to mention that
Thanks a lot for the grading! -
Hi Everyone,
When I try to use the MAster and slave template which is provided by the NI itself, try to understand it how it works, but when I use this concept to implement in my code, just found there is the problem at there:
Problem:
1. The master loop always looping even though there do have a notification from the master to slave but the slave do not respond anything, can't figure the reason.
2. When the master loop is exit then the slave loop just start to execute but it is too late cos master loop already exit.
Those senario are different from the master and slave template. need your help.
Thanks
William LeeHi Williamlee,
Thanks for contacting National Instruments,
It would be much easier if we could see your code, this will help us work out where the issue is, and to help us understand where you maybe having issues...
Also I would like to include some more information with regards to the Master/Slave template.Developer Zone article : Application Design Patterns : Master/Slave and also a webcast on Software Design Architectures in NI LabVIEW
Kind regards,
Ashish Naik
Field Sales Engineer
National Instruments UK -
Pretty much what my subject line says. My client wants example text in the fields of a PDF form that will disappear when the cursor enters the field. When I try this with show/hide layers, the layer becomes visible as soon as I enter form editing mode, and the action doesn't work properly. Any help? I was able to get it to work with a single field, but multiple fields with example text on multiple layers doesn't work for some reason.
Thanks for any help.Hi Jeffrey ,
You need to use a custom Format script for the field.
Regards
Sukrit Dhingra -
hi guys,
i am confused about the master and slave realtionship in ospf. any one can explain it to me in detail.Hello Pankaj,
The Master and Slave in OSPF are a slightly confusing concept but the idea behind it is quite simple.
When two routers decide to become fully adjacent, they must synchronize their LSDBs. OSPF tries to optimize this: the routers first exchange only the list of entries in their LSDBs. Each router compares the received list to the list of items in its own database, and if it finds that an LSA is missing or is older than one the neighbor knows about, it requests it from the neighbor afterwards. This way, both routers transmit only the missing or updated LSAs, not the entire LSDBs.
The list of LSDB entries is carried in Database Description (DBD) packets. Naturally, when routers exchange DBD packets, they must be sure all of them have been properly received by the neighbor, so some sort of acknowledgements must be used. There is a problem here, however: the only packets in OSPF used to carry acknowledgements are LSAck packets, but they can only be used to acknowledge LSU packets (more precisely, individual LSAs carried in LSU packets), not DBD packets. How shall the acknowledgements of DBD packets be accomplished, then?
OSPF uses a polling style of communication with the DBD packets. DBD packets themselves have sequence numbers used for sequencing and acknowledgement purposes. One of the two routers that are in the synchronization phase will be the one responsible for polling the other (i.e. calling it out it to send another piece of information if it has any), each time with an incremented sequence number. This is the Master role. The other router will only be allowed to respond to a DBD poll, never send any DBD packet without being polled immediately before, and the response DBD packet must carry the sequence number of the Master's DBD poll packet. This is the Slave role. The Slave must respond to each Master's DBD packet even if it has no more LSDB entries to advertise; in that case, the DBD response body will be empty.
So during the DBD exchange, the Master sends DBD packets to Slave, incrementing the sequence number by one in each round. The Slave waits for DBD packets from the Master and only responds to them, and each response carries the sequence number from the last received Master's DBD packet that was used to poll the Slave. Remember: a Slave must not send DBD packets on its own, only as responses to DBD packets received from the Master, and the sequence number of the Slave's response DBD packet must be set to the Master's poll DBD packet.
While I call the DBD packets as "polls" and "responses" here for the sake of clarity, the DBD packets do not have this distinction indicated explicitly. Any DBD packet sent from the Master, either with a body carrying a list of LSAs or an empty body, is a poll. Any DBD packet sent from the Slave, again either with a non-empty or empty body, is a response. A DBD packet can have an empty body if the router needs to send a DBD packet to the neighbor (either from Master to repeatedly poll the Slave, or from the Slave to confirm the arrival of the DBD packet from the Master) but has no more LSDB entries to advertise itself.
There are two issues with this simple procedure. First, there is the issue of who out of two synchronizing routers will be the Master and who will be the Slave. This is resolved during the ExStart phase: both routers initially treat themselves as Master routers, and send DBD packets with random initial sequence numbers to each other, indicating the MS flag (Master) in their header. As they do this, the router with the lower RouterID moves to the Slave role, while the router with the higher RouterID remains in the Master role. The ExStart phase is basically finished after establishing the router's role in the synchronizing pair; at most two DBD packets are needed for that, one from each router. The Exchange phase then lasts until routers have exchanged the entire list of their LSDB entries using DBD packets.
The second issue is more subtle: how should the Master know whether the Slave needs to be polled further? Clearly, a situation may arise when the Master's LSDB is empty or smaller than the Slave's, and the Master will need to send fewer DBDs than the Slave to list all its LSDB contents. As the Slave can not send a DBD packet on its own, it somehow needs to tell the Master to poll it again. This is accomplished by another flag in DBD packet header, the M (More) flag. If a Slave replies to the Master's DBD packet with its own DBD packet and the M flag set, the Master knows the Slave needs to be polled again. The Master will stop polling the Slave after the last DBD packet fom the Slave has the M flag cleared.
The RFC 2328 has a nice ASCIIart graph of the adjacency coming up:
+---+ +---+
|RT1| |RT2|
+---+ +---+
Down Down
Hello(DR=0,seen=0)
------------------------------>
Hello (DR=RT2,seen=RT1,...) Init
<------------------------------
ExStart D-D (Seq=x,I,M,Master)
------------------------------>
D-D (Seq=y,I,M,Master) ExStart
<------------------------------
Exchange D-D (Seq=y,M,Slave)
------------------------------>
D-D (Seq=y+1,M,Master) Exchange
<------------------------------
D-D (Seq=y+1,M,Slave)
------------------------------>
D-D (Seq=y+n, Master)
<------------------------------
D-D (Seq=y+n, Slave)
Loading ------------------------------>
LS Request Full
------------------------------>
LS Update
<------------------------------
LS Request
------------------------------>
LS Update
<------------------------------
Full
The I flag here is another flag in DBD headers called the Init flag, and is set only on initial DBD packets in the ExStart phase. If the router has established its Master or Slave role, it clears the I flag. This one is not really that important right now.
The Master/Slave relationship is built and relevant only during the initial LSDB synchronization when a new adjacency is being established. After the two routers go past the Exchange state, DBD packets are not used anymore, and the whole Master/Slave relationship is forgotten. Remember: Master/Slave is relevant only to DBD packets, and DBD packets are used only in ExStart/Exchange phases. Outside of these states, there are no DBD packets used, hence no Master/Slave relationships exist.
If there are, say, four routers, R1 till R4, connected to the same switch and run OSPF, during the OSPF bootup, there will be 5 temporary Master/Slave relationship built and torn down afterwards:
between the DR and BDR as they synchronize (assume those routers are R1 and R2)
between R3 and DR
between R3 and BDR
between R4 and DR
between R4 and BDR
Notice the Master/Slave relationship existed between those routers that went through ExStart and Exchange into the Full state. Also keep in mind that in the Full state, there are no more Master/Slave relationship present - they were only needed because of the specific needs of the DBD packet exchange.
Does this make the issue a little more clear? Please feel welcome to ask further!
Best regards,
Peter -
Master and Slave configurations
Hi
I am currently wondering why my master and slave configurations dan't work. I have the Rev. B mother board and I set the jumpers to the right spots. I am trying to get my CD Burner to work with my regular CD Rom on the same wire.Jarrett,
my experience with my 3 Beige G#'s (1 desktop and two towers), tells me that a master/slave configuration with two optical drives is not really possible/compatible.
As a matter of fact, I had to opt for the following solution:
- Sony 52X burner installed in the CD bay;
- Iomega 52X USB burner on the USB PCI card.
I also had a huge number of problems with the master/slave configuration of drives, and it only worked with certain brands of drives.
For instance, two WD drives would not get along in the same case (data corruption like there's no tomorrow.....)
I ended up having a WD and a Seagate, which still get a long nowadays in my B&W G3.
To give you some more curious feedback on the bad habits of the Beige machines........my old G3 now sits in my son's room.
Believe it or not, I had to remove the Sony burner, as the computer would not boot from it, at all.
It would read and play CD's but it would not boot, in the most standard of the configurations:
- CD Burner Master and 1 IDE drive as a slave;
- SCSI card with SCSI drive;
I replaced the burner with the APPLE CD-drive form my B&W, and the system started working and booting like magic (I swear....I did not change anything else).
It boils down to trying and experimenting. I spent countless hours with those machines trying to figure out why the same configuration working on my Beige minitower would not work on my daughter's Beige minitower, exactly identical machines, both with rev. B boards.
Hope this can help.
cheers -
Single Master, multiple details add-rows problem
Hi, hope to get a replay at least this time (last threads have gone unreplied :-( )
We've built a master-multiple details table. Everything in visualization has worked OK until we've got the need to add rows to each
detail table separately (i.e. for same master row, one could add N rows to one detail and M rows to the other).
Keeping the standard "addRows" table buttons doesn't work because the same addRows event is fired for both the subtables, so
adding a row in one just adds a row also to the other, until a dedlock situation is reached.
So we tried to set a different button so we could intercept the originator table (SOURCE_PARAM) in the processForm but here we're facing
some big problems.
First at all, the methods and names are correct: we've tried to use the same code (cut and paste) for the table putting the inner table "outside"
and buttons are working as expected.
But when the detail table is put back "within" the master, what happens is that the AM method called by pFR in the Controller is executed, so
we reach the end of the processFormRequest, but at this time something happens and we get the exception error message reported more below.
I've read that via the VL it is not the original detail VO instance which is showed, so wonder if the error has something to do with that...
So to summarize:
1) all the objects exist and are ok, and the VL is defined OK; and indeed the standard AddRows management works (as said, the problem
is that we need to differentiate two different details...)
2) the methods are OK as they work as soon as the details are put outside the master table.
Any suggestion ? Do we need to refer to a specific details VO instance ???
Thanks in advance. Rgds.
GN
## Detail 0 ##
oracle.apps.fnd.framework.OAException: oracle.jbo.InvalidObjNameException: JBO-25005: Nome oggetto per il tipo Oggetto vista non valido
at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:891)
at oracle.apps.fnd.framework.webui.OAPageErrorHandler.prepareException(OAPageErrorHandler.java:1145)
at oracle.apps.fnd.framework.webui.OAPageErrorHandler.processErrors(OAPageErrorHandler.java:1408)
at oracle.apps.fnd.framework.webui.OAPageBean.processFormRequest(OAPageBean.java:2704)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1707)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:511)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:432)
at OA.jspService(OA.jsp:33)
at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:317)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:465)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:379)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:727)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:306)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:767)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:259)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:106)
at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:803)
at java.lang.Thread.run(Thread.java:534)
oracle.apps.fnd.framework.OAException: oracle.jbo.InvalidObjNameException: JBO-25005: Nome oggetto per il tipo Oggetto vista non valido
at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:891)
at oracle.apps.fnd.framework.webui.OAPageErrorHandler.prepareException(OAPageErrorHandler.java:1145)
at oracle.apps.fnd.framework.webui.OAPageErrorHandler.processErrors(OAPageErrorHandler.java:1408)
at oracle.apps.fnd.framework.webui.OAPageBean.processFormRequest(OAPageBean.java:2704)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1707)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:511)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:432)
at OA.jspService(OA.jsp:33)
at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:317)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:465)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:379)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:727)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:306)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:767)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:259)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:106)
at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:803)
at java.lang.Thread.run(Thread.java:534)Any suggestion on this ? What I need, in other words, is to put two details table under the same master table...
-
Synchronize only checked in records from Master to Slave
Hello All,
Would someone be able to tell me if there are any CLIX commands that allows the slave to synchronize with the master such that only checked in records are transported from master to slave.
Regards
VenkatHi ,
In free-from search you have option of "expression".
There you can put the option of "Is checkout version".
Hope this helps,
Pls let me know the result.
+ An
(you didnt closed your previous questions) -
CS3 Master to CS4 Design upgrade?
Hi folks, I have a question about upgrading... I've contacted Adobe a couple times regarding the issue, but they've yet to get back to me...... Anyway, I'm currently running the CS3 Master Collection, and due to some poor planning at my school, I'm being forced to upgrade to CS4 specifically for InDesign. I'm sure I'll have to upgrade Photoshop, Illustrator, etc. to CS4 in the near future, so I'm going to upgrade the entire suite, not just the individual programs. I was going to upgrade to CS4 Master, but it'd wind up being a waste of money since I primarily only use Photoshop, Illustrator, InDesign, Acrobat, and eventually Dreamweaver. So I'm instead considering just upgrading to CS4 Design.
My question is, am I even able to go from CS3 Master to CS4 Design? And if so, will I be able to access CS3 versions of programs that aren't included in the CS4 upgrade, further down the road if I should ever need to?
Any help would be greatly appreciated, as my InDesign CS4 trial is just about up and I need to upgrade ASAFP!Chris,
>My question is, am I even able to go from CS3 Master to CS4 Design? And if so, will I be able to access CS3 versions of programs that aren't included in the CS4 upgrade...
As long as you have CS3 software installed and activated on your system, you can use it. Even if some CS4 software is. The default launch will be the later application version. But if you simply launch the CS3 version of that application before attempting to open any files, you'll be fine until you quit or shut down.
Neil -
MODBUS RTU - Simulate multiple slave to response to a PLC
Hi! I'm new with the use of the Modbus communication. I would like to simulate 4 devices (I/O Extenders) to response to a PLC. It is possible to do this using only one com port with RS232 to RS485 converter. Do you have an exemple that do this?
To you to reply!
I use Modbus Library.
I suppose that to implement multiple slave I need a NI-9871 or a multi port pci card. But I would like to use only one ComPort for 4 devices. To specify which devices I want to simulate (implement) it's 3 I/O extenders 900MB series and a wind sensor. It is possible to do that or I absolutely need a multiport RS485 card?
Attachments:
900mb_discrete_lg_2.jpg 58 KB -
Hi...
Can anybody tell me .. Where can I find the Universe Designing Examples...
Schema... Loops.. Contexts,... Alias..... Joins....etc...
Regards
LakshmanFYI...
http://pdfdatabase.com/search/business-objects-universe-designer.html
Thanks
-G -
Master-Slave design Implementation
Hi,
I am trying to design a master-slave system with the following attributes:
1. Linux Master box having all the Java code.
2. At least two Windows XP Professional Slave boxes (no Java code on any of these)
Front end screens on Master would contain a text fields for IP Address and Java program to be executed. On a click of button, the slaves (who's IP Address was entered in the Master screen text field) would get the request to execute the given Java program, a given number of times. Once executed, each slave would turn the results in to the master via a file. After all the slaves have turned in their results, Master would consolidate the results, work another program on the results and re-delegate tasks to the slaves. The steps would stop iterating only when an exit criteria specified by the program has been met.
If we were to restrict all code to only the master box, what could be the lucidly possible ways to achieve this design?
Thanks!You will need some machanism to send the programs to slaves atleast temperarly in order to be executed there.
Or you will have to provide a vay for the programs to access the required respurces (files , ect..) in the slaves and let the programs run in the master.
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