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Testing a Modbus master using RTU over TCP
New Replies:
By M Griffin on 16 April, 2009 - 2:37 am -
I believe that Modbus RTU over TPC is as you said, just an RTU message tunneled over TCP. Modbus...
ASI to MODBUS Converter
New Replies:
By Patrick Lansdorf on 8 April, 2009 - 10:02 am -
Hi,
HMS have a gateway from AS-i Master to Modbus RTU slave. For information about the gateway...
Does anyone knows where I can find a modbus to M-Bus gateway?
New Replies:
you might want to have a look at www.syxthsense.com for 20/60 M-bus to Modbus converters...
Question about how to develop a software which is communicating on modbus/TCP
New Replies:
By M Griffin on 6 April, 2009 - 3:51 pm -
A Modbus register is 16 bits, so 450000 isn't going to fit in one register. A common method of...
By Ken Emmons Jr. on 6 April, 2009 - 10:36 am -
I could be wrong, but I believe Modbus only supports 16 bit words. To transfer a 32 bit word you...
Hello,
I got the other problem. I want to send a value( 450000) to the register 23404. But read...
Hi,
I tried again and got the value I wanted finally after I posted my question. I will test it...
By M Griffin on 23 March, 2009 - 1:00 pm -
Did you read the example on the Jamod website for "TCP Master HOW-TO"? They have a...
Thank you for your reply. I am sorry about my questions made you confused. I rewrited my previous...
By M Griffin on 20 March, 2009 - 3:23 pm -
You said: "I got the connection from my program to yours". There are actually several...
By Tommy on 19 March, 2009 - 10:57 pm -
Hi there,
Thank you for your help and I got the connection from my program to yours. But I got...
By M Griffin on 16 March, 2009 - 12:00 am -
Well, to start with you said you are trying to write the value 1 in register 23384, but it looks...
Thank you for your reply. Now, I want to write a simple program to test the communication with...
By M Griffin on 11 March, 2009 - 2:31 pm -
The Jamod web site has some very good explanations and examples. If there is something in...
Working with OTB Expansion Modules
Do you recognize this error checking?
communication between two modbus master
New Replies:
By Darrin Hansen on 25 March, 2009 - 8:51 am -
Although I can't determine precisely based on your information, if you need to convert between...
By Greg on 23 March, 2009 - 9:16 pm -
Easy way would indeed be to use a gateway modbus slave-modbus slave like HMS's X-gateway. Other way...
About Modbus network
New Replies:
Hi Mark,
thanks a lot my friend..i will attempt to simulate the full system with the software...
By Mark Davies on 12 March, 2009 - 10:48 am -
You can run a Master simulator on one serial port and connect to a Slave simulator on another...
Question about a MODBUS slave for WINCE (XScale)
New Replies:
By M Griffin on 19 March, 2009 - 5:01 pm -
I would suggest looking for some C source code libraries. MS WinCE is a fairly obscure platform...
Asking for what users want to see be developed is data communication, alarming and historians.
Modbus RTU Master Driver Needed for Testing Purpose
New Replies:
By Mark on 12 March, 2009 - 12:20 pm -
What OS (Windows, embedded, etc.)?
What development platform (VB, C#, c++, etc.)?
What type...
Modbus Master RTU Driver
Configuration Modbus Slave TCP/IP on Citect Scada ver.7.0
Exception Responses from Modbus Server
New Replies:
By M Griffin on 27 February, 2009 - 4:14 pm -
If you send an exception code that isn't defined in the Modbus spec, how will the client know what...
Looking for modbus upgrade for wincc v6.0
from the Forum department...
implementation of modbus as a gateway between two PC's and a controller in betweenEstablish a communication between modbus over TCP/IP on one side and Modbus over RS232 on other side and ARM board.
How the modbus tcp communicate with modbus slave controller?
New Replies:
By Mark on 24 February, 2009 - 12:07 pm -
Are you looking to write your own Modbus/TCP driver or purchase one?
What OS will it run on?
...
Free Web-based SCADA software
New Replies:
Completely free. With Integraxor one can makes completely free serial or TCP/IP MODBUS projects...
Writing Modbus registers for ABB SCADA
New Replies:
Hi,
Could you give me some directions on what code did you used in place of the HR? 4000?
I'm...
Copy the program from a BC7300 to another BC7300 by using TwinCAT or another software
Problem in programming Siemens Modbus RTU CP341.
New Replies:
By Patrick Lansdorf on 13 February, 2009 - 3:32 am -
Hi Robin,
Lets face it, Modbus was never a fieldbus used frequently by Siemens. I do not know...
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