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Member Information and Posts by mgriffin2 | Member Name: M Griffin |
clarifications about the memory requirement(s) and programming language capabilities.
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There's nothing wrong with asking "student questions". What people don't like is "do...
Help with writing Modbus TCP/IP driver in C++
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Here's a C library.
http://sourceforge.net/projects/libmodbus/
If you are interested in...
how can I generate 12 volts AC or DC using only household water pressure, and what is the smallest this generator can be? Can it be smaller than 120cc?
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In reply to Manuel Lynch: With regards to water driven piston engines (as opposed to turbines),...
What is preferred way of controlling lighting in industrial warehouse applications.
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Motion sensors seem to work quite well in most offices. Area lighting in factories is much harder...
Information on simulating Modbus TCP
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I have an open source / free software project called MBLogic that may be useful to you. The project...
Please help find anything
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In reply to CTTech: If you own the information, drawings, diagrams, etc., you can post them. If you...
I just had a thought here - the problems with images in forum posts would come from accepting them...
In reply to CSA: I want to be clear about a few things. One is that I don't want to filter out...
Ken Crater said:
>- We're about to install a new user-ranking feature on the site
I think...
Turbines and generators are not my field, but I see the same few questions posted over and over...
User ranking now on Control.com
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The up/down vote buttons could use to have more visual separation from each other and from the rest...
from the IPv6 certified trainning centre-Malaysia department...
IPv6 Regional Conference, 2011 MalaysiaIPv6 Regional Conference, July 2011 - www.is-seraya avs.com
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I believe that just recently the Asia-Pacific region *did* run out of IPV4 addresses. The rest of...
search a way to communicate an Omron CP1L-PLC from Windows/Mac/Linux
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You will need to write some functions to encode and decode the host link messages. As for what else...
Have you looked at using a USB to RS-232 converter? ...
Omron also has a protocol called "Hostlink" which operates over RS-232.
For...
I think your first problem is going to be that VB6 is for MS Windows only and doesn't run anywhere...
Report on the progress of the free PLC
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There is a big variety of ARM processors available, but some of them (especially the older models)...
In reply to Ken E: I'm not saying that there is no market for Ethercat. I'm saying:
1) The...
10 usec I/O update? I can point out top selling PLCs that can't add two numbers together that fast....
He said he's using an Atmel SAM9G20-EK. He said it's working (the demo runs with all the client...
I just did a minor bug fix (reporting the CPU type) for someone who was trying to run MBLogic on an...
Can Modbus coexist with other protocols over RS485?
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Ethernet networks use "layered" protocols where the lower layers coordinate things to...
Need advice on Modbus Master code
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Have a look at the following:
http://sourceforge.net/projects/libmodbus/
...
trying to get rpm as 0-5v=0-10K from Analog Devices Inc. 5B45-05 f/v converter. Problem is missing sensor. Tried standard PNP & NPN, but 5B45 does not like it.
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You are correct, I intended to say 10 000 Hz (or 10 kHz), not 10 000 kHz. That's from 10 000 rpm...
I haven't looked up the actual specs, but you should look through the Omron and Red Lion catalogues...
Sensor selection for this application: A 60mm diameter 800 gram steel ball traveling on tarmac, 5m-wide lane at max speed of 31 m/s. At a point I need to measure its position relative to the sides of the lane. Outdoors.
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It's good to hear about your project. When you are trying to figure out the NI counter-timers...
using a third party software to send data requests over to a gateway that's polling Modbus data from a PLC on a serial link and sending it to the master via Modbus TCP/IP.
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I don't have any immediate ideas, but it might help if you could tell us some more information. For...
Need a lot of help with Mblogic.
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I'm the main author of MBLogic, and I would be happy to answer any questions you have. As for...
Does anyone have a price comparison between major PLC manufacturers ?
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In reply to Bob Peterson: I can't speak for "DustinS", but he does explain how he...
That is a very interesting set of data. Something that you might wish to consider adding is...
Matlab RTU
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I think it would be more precise to say that the "string" should be an array of raw...
What is the word size & packet size for modbus comm?
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Here is a 6 step process you can use to solve your problem:
Step 1: Write down what devices you...
You've posted this question under at least 4 different topic headings so far. I doubt that anyone...
I need to migrate many manual interfaces (switches and status LEDs, etc) to PC-based control.
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Unlike the many people who are trying to tell you that you need to use a PLC, I'll just assume that...
S5-115U stops and restarts itself
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In reply to Curt Wuollet: The S5 is not related to the Koyo PLCs. Siemens sold Koyo PLCs under the...
from the Marketing writer needs expert input department...
Need expert input for publication about control securityEasy opportunity for exposure for someone who can speak to security issues in the power-generation industry.
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I would suggest contacting Eric Byres at Byres Security. This subject is his specialty and I am not...
Receiving errors on repeated data
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I would suggest that you talk to the DCS vendor about this problem. It might be a bug rather than a...
Software for Hardware PLC Project
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I was thinking of just the message format and the TTY versus socket issues. I hadn't considered...
A couple of posts ago I said "it would be nice if you were able to just plug it into a USB...
I was thinking in terms of being able to use the I/O with either a Panda board (or some other...
You might want to look into how you would interface this with a computer, whether that's a PC or...
The changes were there. I suspect that they got reverted due to their spam filtering system, since...
I have added the requested information to the wiki. For public contact I have used the forum...
Control.com is slightly broken for people using IE9, but there is a workaround and an upgrade in the works.
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The following isn't a direct reply on this problem, but I thought this was a good lead in to this...
the capabilities of using a micrologix 1400 for modbus comm
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I think that Bob Peterson gave a pretty good estimate above. I will reiterate it, but keep in mind...
You're not going to be able to do more than make a good guess at the speed of a serial network...
32 bit values and Modbus
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The Modbus spec does not cover 32 bit data and there is no standard for it. You should be flexible...
MODBUS map in 32bits or 16bits format
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32 bits gives you larger numbers. You can store a 32 bit number in a standard Modbus map by just...
How to get Modbus compliance certificate
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The trade organization for Modbus can be found at:
www.modbus.org
Contact them for details.
...
Ethernet TCP/IP advantages over RS 485
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RS-485 can have a "bus" type multi-drop connection (multiple connections to the same...
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