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.
1 2 3 4 5 6 7 8 9 10 11 Next
Control.com topic...
Networking
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...
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...
from the Development department...
Help Me with Modbus Addressing
Topic: Software, including programming, OS issues, etc.
Originally posted by ParagonIndore on 5 November, 2009 - 6:07 am
Value of Modbus address assignment table
New Replies:
The assignment of information is done by the manufacturer of your hardware. They can choose what...
from the serious department...
90-30 CPU 331 with CMM321 and Modbus
Topic: Communications systems and equipment.
Originally posted by Charles mcKinley on 4 November, 2009 - 1:12 pm
How to implement Modbus addressing for a graphics monitor that does not have the GE protocols in their driver set.
New Replies:
CMM321 is for SRTP communications an EGD (Ethernet Global Data) both are GE Fanuc proprietary...
from the Instrumentation & control department...
communication protocol
Topic: Local and wide area networking in factory automation.
Originally posted by Saraswathy on 2 November, 2009 - 7:40 am
We are having 10 third party PLC systems to be connected to DCS. We wanted to use ModBus TCP/IP protocol. For this, OPC server facility is required or the PLCs will act as ModBus TCP/IP Server. Please clarify
New Replies:
OPC won't drive your cost up at all (note the price in the link below). The OPC server for Modbus...
I'm assuming that your 3rd party PLC currently communicate through Serial MODBUS. In that case you...
If your PLCs have Modbus TCP server cards you don't need a OPC server. If your PLCs don't...
If your DCS talks Modbus TCP as a Modbus master directly (a likely scenario) the DCS can talk...
If your DCS and your PLCs are all capable of communicating in Modbus TCP/IP you shouldn't need a...
Topic: Communications systems and equipment.
Originally posted by asaria on 25 October, 2009 - 12:01 pm
Any of you know how to minimize delay time in MODBUS RTU over RS-485 2-wire
New Replies:
As the saying goes, "fix all the things you know are wrong and all the weird stuff just...
All, Thanks for your support. I had solved the problem today. The problem is, in field they...
I had checked it. From panel, I tried to read data from slave using Modbus simulator, i got only 2s...
What do you mean by KeyUp and KeyDown timing?...
I'd check to see if the slave has a "response delay", or similar setting. Also, since...
It is possible to get reply from logo in seconds if you can change/access modbus communication...
Seems you probably have a KeyUp/KeyDown timing issue. The most common problem is the slave responds...
from the Automation department...
IC200CPU001 modbus
Topic: Communications systems and equipment.
Originally posted by Dang quang Hung on 28 October, 2009 - 12:24 am
Modbus RTU master for versamax PLC
New Replies:
Yes, you can communicate SRTP, the programming protocol, through the VersaMax IC200CPU001 Port 1. ...
from the SCADA department...
Modbus TCP/ IP to GE Fanuc 90-30
Topic: Communications systems and equipment.
Posted by Pick on 1 November, 2009 - 9:43 am
Connecting Data Flow Systems Hyperserver to a GE 9030 OLC using standard Modbus addressing.
from the Paragon department...
Toshiba IFMB640TLE control
Topic: Local and wide area networking in factory automation.
Posted by ParagonIndore on 30 October, 2009 - 6:54 am
Any one have any idea about Toshiba IFMB640TLE...
Topic: Communications systems and equipment.
Originally posted by Sven on 15 October, 2009 - 3:45 pm
how to multiplex RS485 slaves over single RS232 channel
New Replies:
Hi Patrick, Thanks for the reply. Your product too does what we needed, but as I just said in...
By Patrick Lansdorf on 16 October, 2009 - 3:10 am -
Hi, I think that there are a number of options that you have to choose from. I would use a...
What exactly are you trying to do.. For example.. Connect 3 slave (Remote) through modem to PC...
Topic: Communications systems and equipment.
Originally posted by Steve on 18 October, 2009 - 12:30 pm
Water/Gas Meter with Modbus/LonTalk/BACnet Compatibility
New Replies:
Hello Steve, For your application, I recommend using a Sensus (or Sensus-compatible) water meter...
from the Forum department...
MODBUS and flow meter
Topic: Software, including programming, OS issues, etc.
Originally posted by zabee on 29 July, 2009 - 1:26 am
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...
from the I love "open" networks department...
AB MicroLogix to Modbus Register 5xxxx
Topic: Communications systems and equipment.
Originally posted by Gary on 14 October, 2009 - 3:45 pm
Can MicroLogic PLC read Modbus Holding Registers in the 5xxxx range?
New Replies:
Thanks to Mark for the correction. It appears that old versions of the Modbus spec did make some...
Hello, What Mr. Griffin said is 99.99999% accurate. The current specification: MODBUS...
The typical Modbus Address Scheme is : 0x = Digital Outputs (Bit)(Read / Write) 1x = Digital...
Try reading Register = 50102-40001 = 10101 = 0x2775...
By Patrick Lansdorf on 15 October, 2009 - 3:02 am -
Hi, I cannot answer if a MicroLogic PLC can read 5xxxx registers. But if it cannot, I would...
from the Instrumentation department...
Modbus on TCP
Topic: Communications systems and equipment.
Originally posted by Francisco on 15 October, 2009 - 7:32 am
Is it possible to use any RS232 to TCP converter or should I use a specific converter for Modbus?
New Replies:
I use a B&B ESP901 Single Port RS-232/422/485, as an example, and it can be used with any...
Modbus over TCP is what you get when you use a straing serial to ethernet converter. This is...
from the Instrumentation department...
Modbus RTU to TCP converter
Topic: Communications systems and equipment.
Originally posted by Francisco on 14 October, 2009 - 7:49 am
RTU / TCP mapping
New Replies:
In a typical Modbus RTU to TCP gateway the data stays the same. It's just the wrapper around the...
Yes it will remain the same. The address structure is exactly the same....
1 2 3 4 5 6 7 8 9 10 11 Next
 
 
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.