Member Login
member
passwd
remember me on
this computer.

- join now -
- forgot username or password? -

Jump to a Date

Cool stuff
Select a topic of interest:
...and press:
RSS Feed
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.
Posts from...
Today, Friday, November 20, 2009
Topic: Local and wide area networking in factory automation.
Posted by Jose Claudeni on 20 November, 2009 - 1:25 pm
Can MODBUS TCP/IP devices share the same infrastructure with Ethernet/IP devices?
from the Operation department...
Modbus analyzer
Topic: Communications systems and equipment.
Originally posted by James on 20 November, 2009 - 5:53 am
Searching some Modbus sniffer software. freeware if available.
New Replies:
I have a free WIN32 Console application that diode auctioneers two Async data streams into one...
from the EMB department...
Modbus addressing for Function code 01
Topic: Power generation equipment control.
Posted by shailendra singh on 20 November, 2009 - 3:18 am
using function code 01 for reading Booleans and from slave side address given 40010 what will our starting address?
from the AUTOMATION department...
MODBUS TCP/IP communications
Topic: Communications systems and equipment.
Originally posted by GENJUA on 18 November, 2009 - 4:19 am
We are trying to built up communication of power meter pm-710 with egx-100.
New Replies:
Mark, ya i try with end terminal resistor as well. John Correa, know i am reading only 2...
Only thing that can suggest (by now) is that you change the update rate of your MB_TCP driver. May...
Hello, Jumping in the middle here and I might have missed something. How about termination...
John Correa, sometimes i get the error which is NEGATIVE ACKNOWLDGE and sometimes the error is...
The EGX100 supports a total of 32 open TCP/IP connections at one time with the 2.7 firmware. It...
Check the error message type in your EGX100. If the error message is TIMEOUT may be something wrong...
from the Forum department...
Need help with Modbus on CS300
Topic: Continuous process industries, DCS questions.
Originally posted by Chris Ferrell on 16 September, 2009 - 7:24 am
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...
from the Have No Clue department...
Discrete Inputs, Coils and Registers Cmds
Topic: Application Questions and Problems
Originally posted by criders on 16 November, 2009 - 10:13 am
What is the difference between the first four mod bus commands?
New Replies:
Cool. Thanks M Griffin....
Your division of: DIN : Discrete Inputs DOUT : Coils AIN : Input Registers AOUT : Holding...
from the Forum department...
Micrologix 1100 to Agilent 34980A
Topic: PLCs and related questions.
Originally posted by sfras on 29 October, 2009 - 8:50 am
Need to connect Micrologix 1100 PLC to Agilent 34980A.
New Replies:
Am I missing something? What does the IEEE 488.1 and 488.2 standard have to do with RS485? The MM...
I am not sure if the Micrologix can do ASCII serial, but if it can then you should be able to use...
You can configure the MM Transmitters with almost any generic Modbus Host. For example, the...
We have the base models of the MM. off the top of my head I think it's the 1700 so it only has one...
Your existing Micrologix 1100 can easily read modbus registers into its own internal data...
Are you sure you even need Modbus? Most all MM Transmitters support 2 x 4-20 mA Analog Outputs that...
The PLC would serve as a Modbus Host over RS485 to all MM Transmitters. The PLC program would then...
I am not sure I follow your original post but if it requires using a MicroLogix 1100 PLC to...
I have been instructed not to go with the option of using the VB modification. We already have the...
Check out Automated Solutions' website for a Modbus (master or slave) ActiveX Control that can...
I am currently retired from an Emerson Rep and I have over 25 years experience with Micromotion and...
You will need a Modbus driver that will work with MS Visual Basic, and you will need someone who...
I think I see what you are saying. We are using Visual Basic to compile the data from the Agilent...
This is a common challenge in the control systems world usually resolved by using OPC. To learn...
The Agilent rack is a data acquisition rack. What is it hooked up to though? A PC? If so, then why...
Topic: Communications systems and equipment.
Originally posted by interop on 3 February, 2009 - 12:04 pm
Can only read 6 registers from Controlotron 1010 flow meter via Modbus
New Replies:
If you are using a Prosoft Module for Modbus Communication from a PLC and you are getting a Command...
I set up a Test jig with a piece of plastic pipe so I could get some flow rate albeit very low with...
First of all, thank you for your answers. Yes, the EPROM version is 5.1. The problem here,...
Yes, If you are experiencing a communication failure and the active light stays on then you will...
FUS1010 Problems with Comm Card for Modbus. Make sure you have the latest Firmware on the card....
Hello everyone, I have the same problem as the first entry. I have a 1015N-5M card assembled...
from the Forum department...
ION 7600 modbus
Topic: Communications systems and equipment.
Originally posted by malinim on 4 June, 2009 - 11:24 am
need modbus map
New Replies:
Hi! I got mine from the internet. The document name is "ION 7500/ION 7600/ION 8000 Series...
from the Forum department...
Modbus and acyclic time
Topic: PLCs and related questions.
Originally posted by Zago on 16 November, 2009 - 12:01 pm
Modbus and acyclic time
New Replies:
Some of the functionalities are located on the field, in particular the diagnostic functions. I...
Modbus is strictly a communications protocol. The DCS, PLC, or other controller determines how and...
Topic: Communications systems and equipment.
Originally posted by Daniel Barrera on 13 November, 2009 - 9:26 am
I have a problem when I want to read the modbus of SHARK 100, because I can't read 32-bit IEEE floating point format in VIJEO DESIGNER 5.0.
New Replies:
Hi guys, If you cannot find a solution, I can recommend using a gateway. HMS has one that may...
> And, speaking of standards... I would sure love to see a date standard. What is 3/6/9? March...
There is an option for each device communications driver to change the double word order. If the FP...
from the Forum department...
Low cost modbus meters
Topic: Application Questions and Problems
Originally posted by Raj on 16 November, 2009 - 4:32 pm
Low cost power meter-data acquisition.
New Replies:
Raj, I was not able to tell whether you need 3-phase or single-phase and whether this is for...
from the Service department...
Modbus distance Maximum
Topic: Local and wide area networking in factory automation.
Originally posted by Sathis on 16 November, 2009 - 3:29 am
modbus communication distance maximum
New Replies:
Modbus itself specifies no distances, as it doesn't even specify any particular physical layer. ...
Topic: Communications systems and equipment.
Originally posted by Calle Lundin on 12 November, 2009 - 10:35 am
problem trying to connect a Advantys OTB 1S0DM9LP to Vijeo Citect through MODBUS RTU
New Replies:
By MPA from Slovakia on 13 November, 2009 - 5:40 pm -
Hi, OTB works with two data areas: static ones and user data table %MW2000:X0 up to X11 - is...
from the Modbus department...
Liebert HPM
Topic: Communications systems and equipment.
Posted by Sohaib on 13 November, 2009 - 5:54 am
using a Liebert HPM need Modbus and Lonworks info
from the Forum department...
timout detection by a Modbus slave device
Topic: Communications systems and equipment.
Originally posted by theo1976 on 12 November, 2009 - 9:10 am
timout detection by slave
New Replies:
That would be a watchdog function. There is nothing in the Modbus specification about that because...
from the Forum department...
Problem with Beckhoff BC9000 + KL6021
Topic: Local and wide area networking in factory automation.
Originally posted by mr24 on 10 November, 2009 - 4:12 am
Problem with Beckhoff BC9000 + KL6021
New Replies:
Thank you for the link...
You could try posting this question on the TwinCAT Developers forum on LinkedIn...
from the Forum department...
SICES DST4400 Modbus Spec
Topic: Power generation equipment control.
Posted by Tony Richardson on 12 November, 2009 - 8:24 am
Looking for full modbus spec for the SICES DST440 generator controller
from the Maintenance department...
Modbus communication with S7-400
Topic: Communications systems and equipment.
Posted by Antonio Luiz on 12 November, 2009 - 7:14 am
S7-400 communicating with RKI INSTRUMENTS in Modbus mode looses communication
from the Forum department...
KingFisher To WW I/O server
Topic: Human-Machine Interface and SCADA.
Originally posted by Herman on 15 September, 2009 - 7:43 pm
Connecting KingFisher to Wonderware
New Replies:
dear Herman, there is a software called Parasyn (Australian company) who have a driver which...
Topic: Communications systems and equipment.
Posted by Vern on 11 November, 2009 - 9:22 pm
Need help with hardware interface PLC Direct DL06 to Emerson Control Techniques EPP drive via Modbus DH485
Topic: Communications systems and equipment.
Posted by panson on 11 November, 2009 - 6:20 pm
information about devices Mayr with modbus communications
Topic: Communications systems and equipment.
Originally posted by Sekar on 6 November, 2009 - 11:11 pm
Communication between Tricon PLC and Siemens S5 PLC via Modbus TCP/IP protocol
New Replies:
I suspect that the problem is most likely in the Siemens computer ordering system rather than in...
> Exactly which modules did your Siemens rep say that you needed? < Hi Darrin, Im...
Hi, Thanks for the reply. Im currently using Simatic S5 133U and want to communicate with Tricon...
hello i do not think that You need a special communication, no triconex. if You got the siemens...
> I was told i needed a siemens communication module, sub-interface module and a specific modbus...
this is a common challenge in automation world usually solved by using OPC. have you tried that...
from the dcs department...
teleperm xp system admin material
Topic: Power generation equipment control.
Originally posted by nivasnet on 2 July, 2009 - 9:10 am
teleperm xp system admini documentation needed
New Replies:
Dear Srinivasa, the manual is free in the website, but login not. Contact me at deboneye [at]...
from the Forum department...
Modbus TCPIP master to many slaves
Topic: Communications systems and equipment.
Originally posted by Miroslav on 30 October, 2009 - 6:03 am
Modbus TCPIP master to many slaves
New Replies:
>> thanks for your comments. You clarified what I was thinking. I will implement 1x socked...
Hi, thanks for your comments. You clarified what I was thinking. I will implement 1x socked per...
Miroslav, If your slaves (servers) support Modbus/UDP, then you could use Modbus/UDP as an...
This has been answered a couple of times already, but I would like to clarify a point. Normally,...
Functionally, either will work. It's more an issue of performance, which may or may not be a...
I would suggest to leave your 15 connections open for efficiency. It may not be necessary, but why...
from the Forum department...
Modbus RTU + Telnet over GPRS + Binary
Topic: Communications systems and equipment.
Originally posted by RKay on 7 November, 2009 - 9:01 pm
Problem transferring Binary data over the GPRS Network while communicating to a modbus rtu
New Replies:
Telnet is designed for 7-bit ASCII. It doesn't allow raw 8-bit binary data - various bytes (such...
Hello again, > Modbus RTU can be sensitive to timing "gaps" in the message. < ...
Modbus RTU can be sensitive to timing "gaps" in the message. It could be the GSM modem is...
from the Communication issue department...
Connecting Zelio Smart Relay with Kepware OPC Server
Topic: PLCs and related questions.
Originally posted by Waleed El-Badry on 30 October, 2009 - 10:47 am
I'd like to pull data from the Telemecanique Zelio Logic Relay.
New Replies:
I really would like to thanks all of you for dedicating time to answer my post. I only want to...
If you want to use modbus you must buy a modbus expansion unit to plug on the side of the zelio...
If you need a Modbus and OPCServer converter, check out the FieldServer OPCServer from...
I would be surprised if you find a freeware server that will do the job. If the one you have is not...
Thanks Wassim for your response, I regret to inform you that the link you posted is reported as...
Try this OPC Server... and let me know how it goes ...
from the engineer department...
How To Read Modbus register vales on SNMP?
Topic: Communications systems and equipment.
Originally posted by GENNJUA on 29 August, 2009 - 2:06 am
Reading Modbus registers using SNMP Protocol
New Replies:
Have you considered using OPC for this? let me know Wassim Daoud Global solutions architect ...
By Gustavo A. Valero P. on 8 November, 2009 - 9:13 pm -
Hi, What you need is a device called "gateway" which translates your Modbus data to...
Salam GEN, you can read modbus device register by making a low level program using Visual Basic...
from the Forum department...
MARK VI Problem with TCI
Topic: Human-Machine Interface and SCADA.
Originally posted by ahmed ali on 1 November, 2009 - 4:58 am
I have some problems on the TCI.
it stops when the operating system of the HMI start.
New Replies:
Dear Mr. CSA can you send me your e-mail so we can talk without any delays and I will do...
Ahmed Ali, I really don't understand the problem. I saw your 'photo album' and I've re-read your...
CSA please can you check my problem again.....
Dear all please, in the TCI log I found this message LICENSE KEY MISSING: TCI requires a...
Dear Mr. Damon can you go on: start>all programs>GE Control System...
Dear sir, I have the same problem with our HMI and my laptop so. And I did not find the...
Dear sir, First I would like you to know that we receive the unit from another company. and this...
You haven't told us when this problem started and what was changed to create this problem. Are...
from the Development department...
Modbus addressing
Topic: Software, including programming, OS issues, etc.
Originally posted by ParagonIndore on 30 October, 2009 - 8:02 am
Addressing Problem with Modbus/TCP
New Replies:
To add to my previous reply, "coils" are read-write and are normally used as outputs....
According to page 7 of your document, for n=64 the coil address are: 9577-9584 On/Off setting ...
Thank You for your reply. I know the address is preassigned. That's what i am asking what will...
That document describes a module which converts between Modbus and TSCNet. According to the...
http://74.125.77.132/search?q=cache:Rj0LgiQ3ie8J:www.pragoclima.cz/fil es/vrf/sm_modbus_tcbifmb640tle...
I agree, sounds like a block of addresses. For the first address in a table the protocol reads 0,...
The "1" digit on the front of the address might be just a "type" indicator. The...
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.

Users of this site are benefiting from open source technologies, including PHP, MySQL and Apache. Be happy.