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- PC reliability?
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- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
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What is standard for safety of communication networking with multiple triconex system in single plant
New Replies:
By Abhijit Goswami, Haldia on 25 August, 2009 - 12:29 am -
It depends on what the PLCs share. PLCs may share critical "shutdown" signals,...
Interfacing remote PLC through telecommunications line.
New Replies:
Yes we did such thing for one dam project in karnatak, india. Contact to pathan [at] godrej [dot]...
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...
I am using HMI and communicate with yokogawa (cs3000) through MODBUS (ACM12) card of 2-wire system. communication failure is happening with the sub-system.
Want to understand Modbus Function code 126 (Hex 7E)
New Replies:
Frankan,
NO COMMENT!!!...
Thanks Ashraf,
I have an application that need to write to 1xxx & 3xxx inputs. I understand...
By M Griffin on 23 August, 2009 - 2:41 am -
Annex A of the MODBUS Application Protocol Specification states: "The following function codes...
Frankan,
This MODBUS Function Code is used in MODBUS TCP/IP, to have full control over a MODBUS...
What is a good DNP3 testing software?
New Replies:
You may use ProtocolTestHarness from http://trianglemicroworks.com. 21 days demo version will be...
Web HMI for HVAC
New Replies:
You may use our http://pvbrowser.org
...
By Sergey Sorokin on 22 August, 2009 - 6:11 pm -
Try www.controlsystemworks.com, it may work for you: it's web-based, it supports writes, it works...
Are there any example source codes and free WITS clients and servers, available?
am want to integrate wincc 5.1 with ipc620-35 honeywell PLC
New Replies:
By Bernd Bauer on 20 August, 2009 - 6:27 am -
The Company at once developed an interface to talk via TCP/IP to the IPC620 CIM / DCM Module. You...
Communications problems Client with Exaquantum Server
Machine to Machine Communication via DP/DP Coupler with flickering data.
Siemens WinCC HMI package to communicate to a Modicon Momentum PLC using MODBUS interface
New Replies:
WinCC version 5.1 does support modbus master driver. I am not sure about the later versions of it....
can prodave be used to communicate with a master
Anybody know how to connect ODBC Excel Database to Sigma.mds file??
Getting Kingfisher to communicate with wonderware via modbus
cat type cable design aspects
New Replies:
By David Ferguson on 18 August, 2009 - 3:42 pm -
It has to do with insulation thickness, twists per inch, material etc. to avoid crosstalk between...
There's this really neat innovation called an Internet search engine (I don't know why it's called...
By kkc on 18 August, 2009 - 5:23 am -
please reply. please tell me basic structural differences b/w cat type cables...
Modbus communication problems with Telemeq. Altivar 31. AB micrologix 1400ML.
New Replies:
By Jerry Miille on 14 August, 2009 - 8:04 pm -
You do not specifically mention it but is this an RS485 connection? I suspect that it must be...
Configuration files for Interbus S CMD Software
New Replies:
Panic over - I managed to get a copy from those nice people at Moeller field service.
Anyone who...
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...
By Jerry Miille on 13 August, 2009 - 8:04 pm -
You are probably reading the "wrong" register. There are two addressing methods commonly...
Burying Fiber Optic Cables in Same Trench as Pipeline
New Replies:
By anonymous on 13 August, 2009 - 10:28 am -
I have been advocating the same for decades now, without any takers. And I have noticed:
1....
Its okay if you first lay a HDPE pipeline and then the F.G. cable is pulled through the pipe....
I am using a Radix make 16 channel temperature scanner which communicates with host computer with RS485. I have used a RS485 to RS232 converter in between...
New Replies:
By Raghu on 13 August, 2009 - 2:19 am -
Can I take these values directly on FTView SCADA?? ...
If I am using a modem for modulating my data over a leased line, which is a better choice, 2 wire or a 4 wire leased line.
New Replies:
By Roy Matson on 12 August, 2009 - 7:18 pm -
Do you mean using 4 lines? I would expect that to increase the throughput but won't it cost more to...
Somebody have an EDS file for Fanuc Robots
Convert SIMATIC to MODBUS address
New Replies:
To poll Address 11, Reg 40001 for 2 Regs:
0B 03 00 00 00 02 C4 A1
To poll Address 12 register...
Need a 'software serial port' that will allow my modbus RTU software to communicate with a modbus TCP/IP device
New Replies:
I think you should use APC-Aftek's Protocol Converter (APC) series provide a solution for reliable...
Connectivity from RSLogix on USB PC to SLC 5/04
New Replies:
CY,
I've found that some USB-Serial adapters can't handle parity = odd or parity = even.
They...
Same cable or not?
New Replies:
By William Sturm on 11 August, 2009 - 7:12 pm -
I know about the rules regarding insulation voltage ratings in a raceway, and I agree it is...
By Phil Corso on 11 August, 2009 - 4:20 pm -
James... thanks for making my point, which was that engineers often overlook a very common...
By James Ingraham on 11 August, 2009 - 11:08 am -
Phil said: "I never said power and communicatons circuits were disallowed in the same...
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