Placement Algorithm wanted
Folks'es,
i need to write an application that displays the objects of a database in a nice tree/graph style.
i have everything i need, except for a neat placement algorithm, that puts the object icons nicely on the screen.
anybody implemented something like this and is willing to share?
anybody has useful pointers where i can find code examples (i read all the papers...;)
tia,
thomas
Jusko,
I agree, it is definitely a bug, I just hope to not stumble on revealing it again. Meanwhile, I got an email from tech support:
"I understand that the #at numbered markers# option is not available when using the #automate to sequence# feature.
I see that by creating a new user account, that you have resolved this
issue. That#s great news. Often times problems in software is the result
of corrupted permissions on a user account. I recommend that you
continue to work under the new account."
I like your idea better. I'd rather delete a file than create a new user ID every time I run into this problem. Meanwhile, I've copied my latest good config file so I can fall back on it after deleting the corrupted one.
As an aside, here's the path to the config file on my PC:
"C:\Documents and Settings\Sid\Desktop\Adobe CS3\Adobe Premiere Pro CS3".
Thanks again for all your help!
Sid
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Problem Description :
Dear Sir,
We are doing a project where we are using Lookout with
Front end Modicon PLC. The communication is by
Ethernet, using Modbus.
Since the installation is at a distant place, we wanted
to use another PC (running Lookout) to simulate the
PLC. For this, we tried to communicate
a: the server Lookout PC running Modbus Ethernet mode of
Modbus object as Master
b: with another PC (for simulating the PLC) running
Modbus Slave
We did not get any communication. (we have given the
details of what we have done, at the end of this email)
We also tried connecting the above 2 PC's as
a: the server Lookout PC running Modbus Serial mode of
Modbus object as Master
b: with another PC (for simulating the PLC) running
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Again we did not get any communication.
If instead of PC (b) we connect the Modbus simulator to
PC (a), there is no problem in communicating
Please let us know how to go about establishing the
communication between 2 PC's using Modbus serial,
and Modbus Ethernet. A detailed step by step procedure
would help us a lot.
Thanking you
Warm Regards
Raja Mahbubani
Procedure of our trial with ethernet.
This is what we have done in detail.
On PC A:
We created an object (Pot) and connected it to
the modbus data member of the modbus object say 40001. In the
properties of the modbus object we selected modbus ethernet mode
of communication and in the IP address field we wrote the IP
address of the machine B to which we are trying to communicate
i.e. 152.63.50.2.
On PC B: we tried the following two methods
Trial 1 : We created a modbus slave object and
inserted an expression for the same data memeber to which the
object was connected hoping to get the value of the pot of machine
A on machine B.
Trial 2 : We created a modbus object on machine B and we wrote
the IP address of machine A and inserted an expression for the
same datamemeber to which the object was connected hoping to get
the value of the pot of machine A on machine B.
NI Software : Lookout
Version : 4.0.1 or 4.5
OS : Windows 98
NI Hardware : N/A
Drivers : N/A
Other Hardware/Instruments : N/A
CPU : Pentium
RAM : 64
Vendor : S-Tech
Customer Information :
Raja Mahbubani
Theta Controls
IN
[email protected]
Ph: (+91) 20 4222556/7The ModbusSlave which comes with Lookout currently supports only Serial communication. So, you cannot use Ethernet between your two PCs. At least not with Modbus Master-Slave setup (if you must speak Ethernet between the two PCs, IPASCII object lets you do that, but then you'll need to implement your own protocol).
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Attachments:
pruebararamathscript.vi 39 KBHi,
Indeed there are a lot of gains that places the poles on the desired locations. BUT, seeing as the Varga's SEAP algorithm is implemented, the G matrix is selected through a uniform white noise generator and the desired characteristics are verified (controllability). This does not unsure optimization regarding stability margins or disturbance rejection (sensitivity minimization regarding perturbations an matrix A or B).
As an example, the system presented in this thread, the algorithm implemented in CD Pole Placement.vi computes an observer gain that determine a 7,4455 value for closed loop infinity norm. The place algorithm in Matlab computes an observer gain that determine a 2,8230 value for closed loop infinity norm, so better noise rejection or robustness.
cosmin
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