Topic: Application Questions and Problems
from the Remote Monitoring department...
Originally posted by BAM on 31 July, 2009 - 10:35 pm
Web HMI for HVAC
New Replies:
I have a free web based HMI called "HMI-Server" that might be suitable. You can download...
Topic: Communications systems and equipment.
from the Forum department...
Modbus to HART converter ?
Originally posted by moduser on 31 July, 2009 - 4:41 am
Is it possible to convert Modbus signal from a field device to HART either in the field or in safe area ?
New Replies:
Here's an old thread with some info regarding modbus->hart conversion... ...
Check out the Modbus Organization's Modbus Device Directory (
Posted by Sebu on 31 July, 2009 - 3:14 am
Communication of Sinumerick NC with wonderware
Topic: Communications systems and equipment.
from the department...
Modbus Plus
Originally posted by Ranjan Acharya on 22 July, 2002 - 4:33 pm
Does anyone have a favourite lightning arrestor / in-line surge suppressor that does not mess up a Modbus Plus trunk run?
New Replies:
I agree with Daniel, take a look at Dehn & sons www.dehn-usa. They specialize in lightning and...
Topic: PLCs and related questions.
from the Forum department...
DF1 Driver for Linux
Originally posted by Robert Herrmann on 22 July, 2009 - 10:51 am
I am looking for a DF1 driver for Linux
New Replies:
Thank you for the link. I will have a look...
Try the following: It's source, so the processor...
Posted by Preeti Chauhan on 30 July, 2009 - 1:09 am
Trouble communicating NI visa in labview with the modbus protocol used by watlow F4S temperature controller.
Topic: Communications systems and equipment.
from the Petroleum equipment department...
Tokheim communication
Posted by sanjeev on 29 July, 2009 - 11:55 pm
Tokheim 67A,67B communication specification
Topic: Communications systems and equipment.
from the Forum department...
Broadcast on Modbus TCP
Originally posted by Ilan on 28 July, 2009 - 2:36 am
How do I handle Modbus broadcast requests on TCP when I convert it from a serial bus?
New Replies:
In Modbus RTU broadcast is achieved using 0 as the slave address. TCP only encapsulate RTU frames...
Modbus/TCP uses TCP/IP to deliver the messages. Therefore, broadcast is a TCP/IP feature, not a...
TCP is a a connected state. In order to communicate to a Device that is using TCP you have to...
Originally posted by Prasanthi on 20 July, 2009 - 11:12 pm
Protocol Converter from MODBUS RTU to proprietary protocol(HAI Omni-Link II protocol) on TCPIP
New Replies:
Solutions from the simpler to the harder: 1.- Consult HAI if they have modbus rtu option cards. ...
Hello, You should choose microcontroller with ethernet and serial port. For example Luminary...
Topic: Communications systems and equipment.
from the RS-485 department...
Modbus ASCII RS-485
Originally posted by Vinod Gavande on 29 July, 2009 - 1:32 am
How many slave devices cab be multidroped on RS-485 bus?
New Replies:
A couple years ago, I ran into a specific vendor's single loop controller that limited the number...
This is an electrical limitation of RS-485, not something to do with the protocol. It has to do...
The Master is just another device, so 32 including the Master is your correct answer. Remember, the...
Hello, One Master and 31 slaves = 32 devices. The master is the device as a slave. Regards ...
Hi, For RS485, its 1 + 31. Ramu...
Topic: Open interfaces, software and hardware
from the c++ code for linux department...
Simple C or C++ script to read serial port buffer
Originally posted by Obscurius on 27 August, 2004 - 1:31 am
I would like to read a text string from a device which connected to the serial port and save this string to a text file or in to a database..
New Replies:
Hi there, plz send me the source code in c for sending the data to the serial port. ...
Topic: Human-Machine Interface and SCADA.
from the Forum department...
Register mapping of variable length data
Originally posted by Sebastian Seidel on 15 July, 2009 - 7:49 pm
How to map variable length data to holding registers?
New Replies:
It's always good to hear feedback. The feedback helps other people who are following the discussion...
Now, that took me some time! But I have defined the registers (and am very glad that's finally...
I will start off by saying that what would probably help a lot is to sit down and imagine yourself...
By Sebastian Seidel on 18 July, 2009 - 4:41 pm -
Thank you very much for the swift and in-depth response, without which I would most certainly have...
Originally posted by Moataz Sherif on 19 February, 2009 - 8:02 am
Hi, I wanna interface an ABB dcs system including AC450 and MP200/1 with another type of DCS systems
New Replies:
With over 500 unix OS500s in inventory..... When it comes to masterpiece and ac450 controllers, we...
Topic: Power generation equipment control.
from the Forum department...
Mark V - missing IO card
Originally posted by Jarek on 24 July, 2009 - 4:12 am
Mark V - DCC errors, missing IO card
New Replies:
Good bit of troubleshooting finding that by re-booting the TCDAs (which is what it's believed you...
Topic: Communications systems and equipment.
from the Electronics department...
Microcontroller serial communication
Originally posted by n roy on 24 July, 2009 - 12:30 am
how does 8051 microcontroller do serial communication
New Replies:
Hi, There are basically 2 registers in the SFR map called SCON & SBUF. What ever u write to...
Topic: Communications systems and equipment.
from the Software department...
SINEC H1 to Ethernet (RJ45)
Originally posted by Asif on 24 July, 2009 - 5:52 am
Converting SINEC H1 Cable connection and to Ethernet.
New Replies:
By Tony R. Gunderman on 24 July, 2009 - 8:52 am -
Depending on where you want to do the conversion, an AUI to Ethernet 10-BaseT transceiver may be...
Topic: Communications systems and equipment.
from the Forum department...
Digi One IAP Communication
Originally posted by FelMed on 23 July, 2009 - 2:52 pm
Communication DigiOne IAP with Flexlogix and PC.
New Replies:
By Jeremy Pollard on 23 July, 2009 - 9:32 pm -
The device should have come with a CD. if not you can download the config software from ...
Topic: Programming languages.
from the forum department...
Read weight from an rs232 scale
Posted by Mostaza on 23 July, 2009 - 5:08 pm
Problem reading weight using an rs232 serial port on a pc using VS2005 C#.
Originally posted by James on 28 May, 2009 - 11:53 am
Modbus Connection AB CompactLogix - Mitsubishi A2ACPUcomm
New Replies:
Yes, we want to use compactlogix as a master then Mitsubishi A2ACPU as a slave. Do you mean that we...
Topic: Continuous process industries, DCS questions.
from the LED display board department...
LED display board
Originally posted by Govind on 26 June, 2009 - 2:10 pm
Temperature Display variation
New Replies:
yes,check the controller. maybe there some engineer can help....
Topic: Communications systems and equipment.
from the Engr department...
Modbus 2 Bacnet Convertor
Originally posted by Leonardo on 4 August, 2003 - 6:32 pm
I need Modbus converters
New Replies:
By Yogesh Deshmukh on 22 July, 2009 - 7:33 am -
Aftek have come up with BM series protocol converters to bridge the gap between devices which...
Topic: Communications systems and equipment.
from the System Engineering department...
Modbus RTU via TCP
Originally posted by Salman on 20 May, 2009 - 9:03 am
Is it possible to convert Modbus via TCP into Modbus TCP?
New Replies:
Hello, I know a device which is exactly designed for your requirement, so from-to Modbus RTU...
Topic: Communications systems and equipment.
from the Forum department...
Modbus RTU Master in Program Master mode
Originally posted by Frankan on 16 July, 2009 - 4:10 pm
Need a Modbus RTU Master OPC Server as "Program Master"
New Replies:
Do you have the info how to setup those "Progam Master" paths on MB Plus? Sounds to me...
Topic: Communications systems and equipment.
from the Automation List department...
Problems setting up FMS comm. with CIF50
Originally posted by Ron on 30 January, 2007 - 11:45 pm
New CIF50 isn't able to set up a succesful link with the PLC.
New Replies:
Did you or someone els solved this problem? I have the same issue. Thanks Eric...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Moxa Configuration
Posted by Edgar on 20 July, 2009 - 1:10 am
Configuring moxa unit uc7420 with that of a areva m243 using dnp3 protocol
Topic: PLCs and related questions.
from the Forum department...
communication with slc 5/4
Posted by Soma Bay on 18 July, 2009 - 10:39 am
no communication between my pc and slc 5/4
Topic: PLCs and related questions.
from the Forum department...
1747-cp3 pinout diagram
Posted by Soma Bay on 18 July, 2009 - 1:06 am
Allen Bradley RS-232 (1747-cp3)pinout diagram needed
Topic: Engineering and workplace issues.
from the Instrumentation Kiddie department...
Single DP Xtr for 10:1 Turndown?
Originally posted by Dasa on 16 July, 2009 - 2:28 pm
In era of modern DP smart transmitters do we still need 2 transmitters for 10:1 turndown?
New Replies:
I would say yes provided you are reading the DP from the transmitter with HART of Fieldbus so that...

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