Read and participate in active technical discussions with automation and industrial controls users from all over the world.
Control.com - Nerds in Control
Member Login
Modbus Links
Search
Jump to a Date
Cool stuff
RSS Feed
Use this link to get an RSS feed of the Modbus Community article flow, for private, non-commercial use only:modbus.control.com/rss/
To get a personalized feed, become a member at no cost.
Installing several air monitoring sensors
New Replies:
We are using Modbus485/CS3000 to talk to some SLC500's and a set of gas sensors... what is your...
How can HC900 communicate with ML50?
New Replies:
By Art O on 28 October, 2009 - 1:09 pm -
Hi Keith,
HC900 does support Modbus/TCP so the suggestion from Patrick L to use a Modbus/TCP to...
By David on 24 October, 2009 - 8:31 am -
Sorry, I can't help on facts about ML-50. Whatever the ML-50 is, I've never seen or heard of it...
Question about connection between two control units
New Replies:
Roy, that was my question, too.
Regarding the protocol used by the DCS, 'Ethernet' just isn't...
By Roy Matson on 23 October, 2009 - 12:55 pm -
Pham,
You do have a problem. In my experience most DCS systems have a Modbus communication...
By Wassim Daoud on 23 October, 2009 - 11:37 am -
This is a common challenge in automation world. The more often chosen solution recommended for it...
how a flow meter communicate
New Replies:
For your application, I recommend using a Sensus water meter and a Sensus gas meter, both of which...
By Steve on 17 October, 2009 - 7:46 pm -
Hi,
I am looking for a water meter and a gas meter that can output Modbus, LonTalk, or BACnet. Do...
By vahid on 12 August, 2009 - 4:27 pm -
Thank you for your reply.
I have the Fc config,the FC config can only read the data from one...
You need to go to the Emerson Mobrey website and download one of the Windows based programs such as...
I believe that you will need two pieces of software... one for data collection/communication via...
By vahid on 31 July, 2009 - 3:41 pm -
Scadametrics:
Our flow computers (7955) do have the serial port which supports the Modbud RTU,...
zabee,
If you wish to interrogate totalization and flow rate from water meters, then my company...
Vahid,
The 7955, depending upon which communication options it has, may support MODBUS/RTU or...
By Vahid on 30 July, 2009 - 11:11 am -
Our flow computer is Mobrey 7955, and the fluid is Crude oil, the floe element is orifice. I want...
By vahid on 30 July, 2009 - 11:07 am -
I have the similar case. I had some flow computers that I want some of their data and monitoring...
What is the brand and model of the flow meter? And what is the flow meter monitoring (water, gas,...
I think you are saying you need to convert pulses from the flow meter to an accumulator that...
By Andrzej on 29 July, 2009 - 9:03 am -
Hello,
You can add simply microcontroller like PIC with modbus slave protocol (see...
How to read weight from IND 780 using Modbus TCP/IP
New Replies:
I do not have PL7 installed on my computer and am going from memory.
You do not enter 400001...
It would help if you provide us with the details of which programming software you are using (PL7...
INTERFACING SIEMENS S7 PLC WITH ABB AC800M + COMPACT HMI
New Replies:
By Rob on 8 October, 2009 - 11:02 pm -
Yes, you can if you wish. No, you don't require any other methods.
I assume your S7-313C PLC...
Grass root project looking a cheap way of bringing groups of temperature signals that are in close proximity into a DCS
New Replies:
By Jonas Berge on 2 October, 2009 - 10:33 pm -
There are many kinds of multiplexers: there are HART multiplexers and
temperature sensor...
By David on 28 September, 2009 - 7:10 pm -
HART is an FSK signal superimposed onto a 4-20mA signal from a field transmitter. The HART signal...
>> groups of temperature signals <<
> I would think that you mean thermocouple...
I tend to agree with David, I suspect that you are dealing only with temperature elements, please...
By David on 18 September, 2009 - 8:29 pm -
> groups of temperature signals <
I would think that you mean thermocouple direct because...
communications protocol for modbus ASCII.
New Replies:
By M Griffin on 16 September, 2009 - 8:48 am -
"http://www.modbus.org/tech.php" The link to the download area is at the top of the page....
Hi, I assume that you are writing the software in a PLC, only ask as most PLC's have modbus...
Hi Lewis,
www.modbus.org have all the info. I have in front of me 'Modbus over Serial Line...
Vijeo Designer 5.0 installation error showing error 1324.
Problem communicating to Daniel GC through BridgeMux BM85 to a PC on Modbus RTU RS485/232 link
New Replies:
By Amar Bin Halim on 24 August, 2009 - 8:17 pm -
On both ends of your RS-232 cable (DB9) jumper the RTS (pin 7) with the CTS (pin 8); and jumper DSR...
Return strings from Modbus simulator application differ from that of HVAC system harware
New Replies:
By M Griffin on 14 August, 2009 - 1:38 am -
You haven't really given us enough information to go on. The most common problem that people have...
By Mark on 13 August, 2009 - 8:55 pm -
Hi,
I do not see enough information to determine exactly what is wrong. One thing I do see is...
It is not unusual to have byte reversal issues. One of the devices, Host or Slave, should have a...
By Carl on 13 August, 2009 - 8:41 pm -
The register number could be off by a one, depending on whether the registers are numbered from...
Cable length limitations for the DP-PA couplers and LInk
GE Mark IV - HCMC module hardware and software protocol identification
Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2009 Nerds in Control, LLC. All rights reserved.