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I need Modbus convertors
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...
from the PLC Communication/Running Status department...
Momentum/ 984/ Premium PLC's - how do I monitor the Modbus Plus link light status and Running status in WW InTouch?
communications monitoring on PLC's
How to set a Modicon Quantum PLC as Master
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By Frank Hjaltalin on 13 July, 2009 - 7:38 pm -
I suspect that you mean Modbus Master. Depending on the type of prog. software (Concept or Unity),...
Ideas! How to integrate Profibus on my Modbus device?
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I want to convert Profibus to Modbus TCP/IP. I am using Hilscher NT 100 RE DP Module as Master and...
Planning to install a New Quantum 140 CPU 534 14A in a Modbus Plus Network of older slower processors. Will they communicate together successfully?
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Modbus plus is a token passing network protocol which operates at 1MB/s which means even low end...
XBTGT2110 and a TWDLCAA24DRF CPU that does not want to communicate
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The two most common causes for this are the use of a incorrect cable or the serial port...
By Greg on 23 June, 2009 - 10:30 pm -
What are sure your Modbus settings on the Twido match the settings of the HMI?
Baudrate,...
Problems communicating with modicon premium plc and unity pro
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By chud on 22 June, 2009 - 7:14 am -
You must setup your unitelway driver not modbus.
1. plug in your cable in usb.
2. see what...
Has anyone ever successfully connected a GE Fanuc 90-30 to Labview 7-1?
I'm at a new gig an need to learn drive parameters are being read and their values.
Does a MODBUS AI (MAI) make sense??
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By M Griffin on 11 June, 2009 - 4:40 pm -
The D/A and A/D is for the benefit of field devices that want an analogue signal. The...
Why would anyone convert D to A, and then A back to D from plc to dcs?
There is only one a/d...
By Tashar on 10 June, 2009 - 7:33 am -
If I `ve understood correctly then it means that MODBUS signal format is DIGITAL only i.e. the data...
Modbus has Holding Registers and Input Registers. You cannot write to a Input Register, it is for...
Trouble establishing communications between a Quantuam 311 CPU programmed in Unity and Wonderware InTouch 9.5 and SA85 I/O Server ver 8.1
Communications between Allen Bradley Control Logix PLC and device using Modbus TCP/IP & Modbus Function Code 43
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By M Griffin on 10 June, 2009 - 7:03 pm -
Function code 43 is the "Encapsulated Interface Transport". It is used to tunnel...
By Fred Loveless on 10 June, 2009 - 6:29 pm -
This is not a standard Modbus fucntion code. It is a custom code that is specific to the...
Communication issues between BN 3500/92 gateway and Yokogawa CS 3000
Modbus Connection AB CompactLogix - Mitsubishi A2ACPUcomm
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To answer this question fully, I'm pretty sure we need to know which of these PLC's is to be the...
Ethernet Redundancy for Quantum to Momentum PLC Communication.
Comunication of Schneider Premium and Motorola Moscad
ION OPC Server to be connected to Kepware
Error when attempting to upload program from Siemens S7-200
a question about modbus function codes, as well as looking for help with micrologix1400
New Replies:
By M Griffin on 20 May, 2009 - 11:20 am -
One other point to add to this is the register may be "0" rather than "1"....
By blackj on 20 May, 2009 - 10:14 am -
Thank you all for the help! That was the problem. ...
By M Griffin on 20 May, 2009 - 1:21 am -
Is the register really 40001, or is it actually holding register 1? Some people like to use numeric...
Modicon Register 40001 is Modbus Register 0.
The correct poll is:
01 03 00 00 00 02 C4 0B
...
read accuload double precison floating
mA to modbus converter
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By M Griffin on 14 May, 2009 - 9:30 am -
The Advantech Adam modules are low cost. The 4000 series does Modbus RTU over RS-485, and the 6000...
By DGH Technical Support on 14 May, 2009 - 7:05 am -
DGH offers current input modules with a Modbus RTU output. RS-232 and RS-485 versions are...
Please check: http://www.szsunyuan.com/sy/upload/ISOADA08.pdf
It provides up to 8 pairs of input...
By Roy Matson on 14 May, 2009 - 12:10 am -
Check out Moore Industries, I did something similar with their Data Concentrator modules.
...
Quantum PLC 113 Modbus port communicate on Modbus RTU.
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Modbus Plus protocol uses RS-485 for its multi-drop feature and is a Master-Slave protocol. It is...
abb scada communication error
connecting multiple devices to modbus over rs-232 by using RS-232 to RS-485 converter
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By AM on 11 May, 2009 - 10:11 am -
As you mentioned that with one RS232 modbus port you want to add multipal devices then use...
Testing a Modbus master using RTU over TCP
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By A K Jha on 11 May, 2009 - 6:55 am -
Hi
Pls. visit the site http://www.simplymodbus.ca/ . There I hope you will find the test...
Best way to communicate with a WAGO device from Matlab? (Considering OPC server vs. TCP connection + .dll)
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By M Griffin on 8 May, 2009 - 5:08 pm -
There's jmodbus, and there is jamod. I think the latter is more popular.
...
Hi - sorry about all the typos... wrote that on my phone with norwegian spell checker.
I am...
By Tallak tveide on 8 May, 2009 - 1:07 am -
Hi. I would also think about performance requirements before using matlab for sampling.
The...
By M Griffin on 7 May, 2009 - 1:09 pm -
I can't help you with Matlab, but if you want an alternate approach to the problem you might...
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