Control.com - Nerds in Control
I need a comparison between Modbus and IEC 101
New Replies:
Can you forward me the data on the difference between Modbus and IEC 101 on my mail.
...
By vaishak on 20 February, 2009 - 5:46 am -
Can you send the data on the diffrence between Modbus and IEC 101 by mail....
Communication between CLX to DCS Modbus TCP/IP via wireless
Looking for modbus upgrade for wincc v6.0
How the modbus tcp communicate with modbus slave controller?
New Replies:
By Mark on 24 February, 2009 - 12:07 pm -
Are you looking to write your own Modbus/TCP driver or purchase one?
What OS will it run on?
...
Can anyone help illustrate the frame structure of DNP3 protocol.
New Replies:
I doubt you'll get an answer to this - DNP3 is massively more complex than Modbus. The protocol is...
Problem connecting 2-wire modbus RS-485 to 3-wire Modbus RS-485 on daisychain modbus network.
New Replies:
Start with the MOXA 3180 and add one slave at a time. Do not be suprised if the Data+ and Data-...
networking of almost 200 ge kv2c+ meters for modbus communication using RS485
New Replies:
By lenin morejon on 14 February, 2009 - 8:21 am -
Hi Ron.
I am working with the same Meter but I am using GPRS to transmit the information, I...
By ron on 10 February, 2009 - 10:00 pm -
hi sir, fred loveless,
can i have your email ad? i want to know more on how to interface ge-kv2+...
For wireless, you can look at some of the newer mesh technologies using free-band 900Mhz or 2.4GHz....
Variable mapping
New Replies:
By M Griffin on 10 February, 2009 - 7:21 pm -
The best way to map Modbus registers depends on a lot of different things. Generally, you just do...
Problems talking to a slave machine using the Modbus RTU protocol.
New Replies:
Elmer's reply is CRITICAL & HELPFUL ... ALWAYS use someone else's test tool to confirm an exact...
You will not get a response from a Modbus slave if the CRC is in error, it will be assumed to be...
can you use a Modbus/TCP Ethernet communication between GD multilin 369 and a compactlogix Ethernet port?
Can only read 6 registers from Controlotron 1010 flow meter via Modbus
New Replies:
If this connection is Modbus RTU protocol then you would not want to be using parity and 7 bits....
Allen-Bradley Point I/O Ethernet with Siemens S7.
Modbus TCP version of Simocode - does it exist?
Are there problems with passing DNP3.0-LAN protocol through an Ethernet switch? Also, is DNP-LAN the same as DNP3i?
Seeking an equivalent of a Siemense Simocode Pro V but with a Modbus TCP or straight ethernet output.
data transfer rate between 2 PLC.
New Replies:
By M Griffin on 28 January, 2009 - 4:20 pm -
10/100 M are common speeds for Ethernet. However, note that is *Ethernet*. TCP/IP can operate over...
Need to put a device that uses a custom ASCII protocol on the Modbus network. Is there a device that has its own address that will strip off Modbus data and pass through the data section?
Looking for RS232/ASCII to Modbus/TCP conversion help
New Replies:
Patrick
POE is power-over-ethernet. Permits me to provide the power for the device from the...
How can the coils/registers be accessed?
New Replies:
By Mark on 10 January, 2009 - 12:33 pm -
It might be helpful to see a working Modbus Master and Slave in action. Minimally, it would be...
Modbus multidrop slave simulator software
New Replies:
By Birinder Singh on 10 January, 2009 - 6:57 am -
hi,
see www.rbhsolutions.com for protocol analyzer details.
Best rgards...
By Mark on 30 November, 2008 - 12:16 pm -
Does the gateway convert from Modbus serial to Modbus embedded in Ethernet or Modbus/TCP?
If...
By Steve Myres on 29 November, 2008 - 8:38 pm -
16 Automation Direct DL05's? Couple PC's with 16 serial ports between them and 16 copies of: ...
I have a question about Modbus TCP/IP communications with AutomationDirect PLC
New Replies:
You are contradicting yourself here. If the Modbus/TCP master were sending (writing) a 0 to V2446,...
By rnwest on 29 December, 2008 - 8:48 am -
We are experiencing similiar problems with the ECOM module communicating with Modbus TCP/IP. Can...
DCS lost connection with the Segment
I am looking for a modbus simulator that will be able to read extended registers.
New Replies:
By Mark on 12 December, 2008 - 3:09 pm -
Automated Solutions Modbus Master and Slave products support 0-65535 registers.
...
Tool for testing Modbus SCADA master in extreme critical conditions.
New Replies:
By Mark on 12 December, 2008 - 3:05 pm -
Have a look at Automated Solutions Modbus Slave product.
...
By nenad_m on 12 December, 2008 - 8:09 am -
Hi,
I have one question about MBPoll master.
What is exactly measured elapsed time: is it...
By M Griffin on 30 November, 2008 - 1:52 am -
If this is Modbus/TCP (and not one of the serial versions), have a look at...
Modbus tools.
New Replies:
By Mark on 24 November, 2008 - 1:25 pm -
Automated Solutions products can achieve approx 5~10 mSec base transaction time.
For serial...
By Mark on 18 November, 2008 - 12:24 pm -
Automated Solutions offers Modbus Master and Slave products with comprehensive Modbus function...
Is there a way to send device info over ModBus?
New Replies:
By M Griffin on 20 November, 2008 - 7:05 pm -
With respect to Function 17, the Modbus standard says: "The data contents are specific to each...
from the Nutworking department...
Modbus TCP - Can any IEDs on the ethernet initiate a command to its peer?In a substation with IEDs for protection working on TCP/Modbus, can any IED be a MASTER and initiate a command to its peer?
New Replies:
By Jose Thomas on 18 November, 2008 - 9:36 am -
Modbus TCP by itself is not peer to peer, but it is possible for an IED to have Modbus TCP Client...
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 © 1999-2010 Nerds in Control, LLC. All rights reserved.
Users of this site are benefiting from open source technologies, including PHP, MySQL and Apache. Be happy.
Fortune
You don't sew with a fork, so I see no reason to eat with knitting
needles.
-- Miss Piggy, on eating Chinese Food