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- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
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LCN slow down when connecting TPN server to Matrikon ODH with OPC optimizer on the App-Node
New Replies:
By Wassim Daoud on 20 November, 2009 - 12:39 pm -
I am very interested to know about your OPC Architecture. OPC Optimizer should help you reduce the...
We are fetching 15000 parameters per minute with our PHD system. We have 2 history modules, 3...
Searching some Modbus sniffer software. freeware if available.
New Replies:
By Harvard on 20 November, 2009 - 9:53 am -
I have a free WIN32 Console application that diode auctioneers two Async data streams into one...
We are trying to built up communication of power meter pm-710 with egx-100.
New Replies:
By GENJUA on 20 November, 2009 - 3:10 am -
Mark, ya i try with end terminal resistor as well.
John Correa, know i am reading only 2...
By John Correa on 19 November, 2009 - 7:10 pm -
Only thing that can suggest (by now) is that you change the update rate of your MB_TCP driver. May...
By Mark on 19 November, 2009 - 5:03 pm -
Hello,
Jumping in the middle here and I might have missed something.
How about termination...
John Correa, sometimes i get the error which is NEGATIVE ACKNOWLDGE and sometimes the error is...
The EGX100 supports a total of 32 open TCP/IP connections at one time with the 2.7 firmware. It...
By John Correa on 18 November, 2009 - 4:28 pm -
Check the error message type in your EGX100. If the error message is TIMEOUT may be something wrong...
We are re-implementing the motion control of an astronomical telescope, and need to include complex calculations (in C code) into the position loop.
New Replies:
Thank you very much for spending your time and efforts... your views are most interesting, and very...
By M Griffin on 19 November, 2009 - 2:23 pm -
For each axis you will have a servo motor and drive. The motor will have its own encoder which will...
Hi,
Thank you very much for all the answers.
It is true that telescopes are mainly controlled...
By M Griffin on 18 November, 2009 - 6:33 pm -
The first thing I would do would be to ask the other observatories how they are running this...
Hello Wim:
Our controllers have been used for many years now on many of the large telescopes...
Would like to setup a alt71 to comm. with our plc quantum with a noe77111 card.
New Replies:
Hi,
yes it is modicon cpu, with unity software. After a bit more reading i am able to send...
What type of device are you going to use to control the Altivar 71 Drive? If it is a Modicon PLC,...
Looking for UDC6000 software package CCR plant (regenerator section)
New Replies:
By Bud Buyer on 19 November, 2009 - 1:59 pm -
I'm not familiar with the TDC 3000. Can I assume that an SDI card is a serial digital interface...
Problems communicating with an INFI-90 system over fiber media converters using serial SemAPI w/ PI interface. Communications drop constantly, points take forever to load.
New Replies:
or try media converters by Omnitron Systems:
www.omnitron-systems.com
Email: info [at]...
I have a digital weighing scale I need to connect to the vs.net 2008 Application.
New Replies:
What kind of scale? Comm via Serial, Ethernet???...
what is the address of USB port to code in VB to send signals
New Replies:
Jan Axelson has written a series of books on the topic of I/O access via VB. She has a book titled...
By kevin grey on 19 November, 2009 - 5:50 am -
Hi,
It really depends on what you want to do. There are plenty of designs and commercial...
By Stan on 18 November, 2009 - 1:08 pm -
Kevin, I am very interested in doing something similar. If you find out how to do it, please...
How to determine update rate of GES driver to talk to RX3i.
New Replies:
By John Correa on 18 November, 2009 - 4:38 pm -
The update rate depends on your OPC Server options but for sure it will never have better...
Please contact FieldServer at 408.964.4446 for the OPCFieldServer solution. The FS-B-OPC Server...
By Wassim Daoud on 16 November, 2009 - 1:06 pm -
have you tried contacting OPC Support? Please feel free to contact us at: 1-877-OPC-4ALL
you can...
Can only read 6 registers from Controlotron 1010 flow meter via Modbus
New Replies:
By Paco on 18 November, 2009 - 10:46 am -
If you are using a Prosoft Module for Modbus Communication from a PLC and you are getting a Command...
By Paco on 16 November, 2009 - 11:30 am -
I set up a Test jig with a piece of plastic pipe so I could get some flow rate albeit very low with...
Doc to configure the jumper of the hmi arcnet isa card
New Replies:
By KD on 18 November, 2009 - 10:44 am -
Here is a link to the SOHARD ISA ArcNet manual:
...
How to check scan time of DCS & PLC
New Replies:
By SPR on 18 November, 2009 - 2:03 am -
For other questions:
3. CONTROLLER LOADING: PLC controller loading is with respect to your...
By SPR on 18 November, 2009 - 1:41 am -
SCAN period in PLC and DCS are fundamentally different.
PLC: it is the time taken to scan &...
communicate with a gsm modem connected to RS232 using matlab
New Replies:
At first you have to mention the communication protocol (Serial or parallel,or usb) between modem...
Facing issues with writing data from WW IAS to Rockwell Power Monitor 3000 M6
New Replies:
Ketan,
You are one step ahead of me. I've got some PM 3000 M4 units that I'm trying to setup...
need modbus map
New Replies:
Hi! I got mine from the internet. The document name is "ION 7500/ION 7600/ION 8000 Series...
Modbus and acyclic time
New Replies:
Some of the functionalities are located on the field, in particular the diagnostic functions. I...
By M Griffin on 16 November, 2009 - 9:16 pm -
Modbus is strictly a communications protocol. The DCS, PLC, or other controller determines how and...
I have a problem when I want to read the modbus of SHARK 100, because I can't read 32-bit IEEE floating point format in VIJEO DESIGNER 5.0.
New Replies:
By Patrick Lansdorf on 17 November, 2009 - 4:14 am -
Hi guys,
If you cannot find a solution, I can recommend using a gateway. HMS has one that may...
> And, speaking of standards... I would sure love to see a date standard. What is 3/6/9? March...
There is an option for each device communications driver to change the double word order. If the FP...
Low cost power meter-data acquisition.
New Replies:
Raj,
I was not able to tell whether you need 3-phase or single-phase and whether this is for...
Does anyone here has an experience using simplex device for Fiber Optics?
New Replies:
By Paul Wacker on 16 November, 2009 - 1:08 pm -
WDM is full duplex, since transmit and receive are done simultaneously on different wavelengths of...
modbus communication distance maximum
New Replies:
By Darrin Hansen on 16 November, 2009 - 9:35 am -
Modbus itself specifies no distances, as it doesn't even specify any particular physical layer. ...
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