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from the Brain Dump department...
Control.com Post Archive
Engineering and workplace issues. topic
Posted by Tim Mitchell on 10 November, 2000 - 4:16 am
Open transition star-delta starting
Current peaks with open transition star-delta starting
PLCs and related questions. topic
Posted by Mark Erdle on 9 November, 2000 - 1:44 pm
RFI and DH+
How can I cut down on DH+ generated RFI?
Continuous process industries, DCS questions. topic
Posted by Marty W on 9 November, 2000 - 9:27 am
Dual PID Control of Temp and Pressure using Steam
I am trying to control the temperature of a Dehyration column using two PID controllers. One PID loop controls the Temperature using steam flow. The other loop controls the steam pressure. Both are using an air actuated valve. Any suggestions would be appreciated.
Software, including programming, OS issues, etc. topic
Posted by (TECO) David Bergeron on 9 November, 2000 - 8:38 am
Software to log system changes
Is anyone aware of software to monitor and log any changes made to a system like deleting, adding, or changing files?
Sensor technologies. topic
Posted by Albert Avidor on 9 November, 2000 - 8:00 am
pH sensor problem
controlling ph level in an acid scrubber
Open-source control projects, related links.  topic
Posted by Philip Costigan on 9 November, 2000 - 5:18 am
undecided
I'm working on the modbus stuff and have come to a point where I would like a directional nudge. ...
Communications systems and equipment. topic
Posted by Hullsiek, William on 8 November, 2000 - 3:37 pm
Standards--whatever, was OPC or Mimosa for XML?
Before going off and inventing your own standards, XML, or what-ever, you still need to come up with standard object model. This is probably where the real work is. ...
Information resources, documentation. topic
Posted by Walt Boyes on 8 November, 2000 - 3:26 pm
Free ISA Standards, was Source for ISA standard
We can certainly print up standards with, say, Fisher-Rosemount's name on them...if FRCO wants to pay for it. Or they can license the thing and print them themselves. We can do that. ....
Software, including programming, OS issues, etc. topic
Posted by badar on 8 November, 2000 - 3:21 pm
Software to simulate Automatic Control System
Software to simulate Automatic Control System
Engineering and workplace issues. topic
Posted by Jiri Stepanek on 8 November, 2000 - 1:35 pm
DC-DC 11-36V/24V
Where can I find DC-DC convertor 11-36V/24V ?
PLCs and related questions. topic
Posted by pierfrancesco mastinu on 8 November, 2000 - 1:24 pm
Unencrypted error on ABB PLC
system stopped due to an unencrypted error
Continuous process industries, DCS questions. topic
Posted by Dai Ly on 8 November, 2000 - 12:20 pm
pH titration/control
pH titration/control to a set point of a container volume ranging from 10 liters to 1000 liters.
Continuous process industries, DCS questions. topic
Posted by Peter Wong on 8 November, 2000 - 12:12 pm
about PID design
how to design a control system using PID controller.
Sensor technologies. topic
Posted by badar on 8 November, 2000 - 11:21 am
Fruit quality based on resistance and capacitance
Anybody know about measuring the resistance and capacitance of the fruit to determine the quality or content of fruit.
Communications systems and equipment. topic
Posted by Perihan_D6zkan on 8 November, 2000 - 10:32 am
Profibus for Omron PLC
Need advice on using Profibus on Omron PLC
Human-Machine Interface and SCADA. topic
Posted by Metin TASAR on 8 November, 2000 - 9:57 am
ATV H260
Does anybody have information about the "ATV H260" standards?
Sensor technologies. topic
Posted by Phillip Costantinou on 8 November, 2000 - 9:11 am
SENSOR info request
Does anyone on the list know who makes (if any)
a device that accepts a 4-20 mA input and varies
a 0-5k-ohm pot in linear proportion to the input?
Has anyone ever had to do this?
Information resources, documentation. topic
Posted by Perez, Claudio on 8 November, 2000 - 9:08 am
AIM*Historian message database format
I need information about the database format used by Foxboro AIM*Historian . We are using AIM*Spy to view message database but those tools are really useful so we decided to develop our own. ...
Communications systems and equipment. topic
Posted by Keith Clendening on 8 November, 2000 - 8:47 am
Square D PLC Communications
Communications problems on pump stations
PLCs and related questions. topic
Posted by Bob on 8 November, 2000 - 5:58 am
TISoft & Windows 95
How do I print TISoft ladder logic and documentation using a Windows printer ?
Software, including programming, OS issues, etc. topic
Posted by Derek Chua on 7 November, 2000 - 7:22 pm
Web Enabling Processing Mill using Siemens S7-300 and LookOut Software
Siemens S7-300 to interface with PLC using a MPI cable. The processing of the PLC will be controlled by LookOut, software which is installed into the PC.
Information resources, documentation. topic
Posted by Jim Pinto on 7 November, 2000 - 2:19 pm
The Honeywell Saga
More on the Honeywell sale saga at http://www.jimpinto.com/writings/honeywellsaga.html
PLCs and related questions. topic
Posted by Peter Thornton on 7 November, 2000 - 11:32 am
Battery Backup
What options has anyone used for battery backup of a PLC, where a battery low indication is required.
Open-source control projects, related links.  topic
Posted by Rufus on 6 November, 2000 - 5:04 pm
Steeplechase thread drift (from EMC)
> What would be real interesting would be if Steeplechase would port to RTLinux/Linux. I've mentioned it to them ...<clip> <

It may be a licensing issue as well.
Open-source control projects, related links.  topic
Posted by jackh on 6 November, 2000 - 4:03 pm
Java HMI
I have put up a (buggy) prototype of the LPC Java based HMI. I will be using it as the based for a ladder programming tool, so any major problems you find now will be helpful. The two controls are for a simple adder, and for an on-delay (TON) timer. You can find it at:

http://claymore.engineer.gvsu.edu/lpcd
PLCs and related questions. topic
Posted by RENE VENTER on 6 November, 2000 - 1:53 pm
Analog address?
Siemens S5-95U PLC and onboard analog inputs
Information resources, documentation. topic
Posted by Salih Dundar on 6 November, 2000 - 1:40 pm
Thermocouple types and diffrences
Looking thermocouple types and diffrences between them...
Application Questions and Problems topic
Posted by badar on 6 November, 2000 - 1:15 pm
Artificial Neural Network
I want to know about one of the features in the neural network which is called classification.
Open-source control projects, related links.  topic
Posted by Mario de Sousa on 6 November, 2000 - 12:39 pm
plc5 emulator
Hi all,

I have just commited the first working version of Hugh's plc5 emulator
to the cvs.
Information resources, documentation. topic
Posted by Jim Pinto on 6 November, 2000 - 11:10 am
JimPinto.com eNews - 2 November '00
The latest JimPinto.com eNews is on the web at :
http://www.jimpinto.com/enews/nov2-2000.html
Communications systems and equipment. topic
Posted by roger Irwin on 6 November, 2000 - 10:33 am
OPC or Mimosa for XML?
I am ever more convinced that the future of plant wide supervison and industrial control lies in the hands of XML, and it would seem that most
would agree with this, certainly when you ask anybody about it they say "thats the way we are heading". ....
Motion control, servos, steppers, etc. topic
Posted by Bob Dannenfelser on 6 November, 2000 - 10:30 am
Motor Design
Help with exam question on motors designed for use in correcting power factor
Communications systems and equipment. topic
Posted by Sam on 6 November, 2000 - 9:44 am
AB PLC to PC (serial) communication
I am a 4th year electrical engineering student, currently involved in my senior project. As part of my project I need to connect an Allen Bradley PLC-5 with a PC to exchange data. On PLC side I am using ASCII Read block to read data from the PC. On the PC side I am using Visual Basic MSComm control to sent data to the PLC. The cable (null modem) is connected from the COM port of the PC to the Channel 0 (serial port) of the PLC-5/11. From the past experience and reading I understand that channel 0 of the PLC-5 uses RS-232 protocol to transfer data. If that is correct then it should be receiving the data being sent through the COM port of the PC. But for some reason PLC doesn't seems to be accepting any data through channel 0.
PLCs and related questions. topic
Posted by Pierre on 6 November, 2000 - 9:10 am
Siemens or Mitsubishi?
Choices, choices...
Motion control, servos, steppers, etc. topic
Posted by Tsiatsios Apostolos on 6 November, 2000 - 7:25 am
Control and protection of a vehicle windscreen wiper motor
I need to find information about how to control and protect a d.c permanent magnet commutator motor
Motion control, servos, steppers, etc. topic
Posted by Tdach on 6 November, 2000 - 2:07 am
How do I initialize position Brushless AC .
I have problem to control Brushless AC motor, sinusoidal type. i want to know how do i initialize position.
PLCs and related questions. topic
Posted by Peter J. Arthur on 5 November, 2000 - 8:51 pm
Correct way to show PLC in drawing?
I need to see the correct way of showing PLC Inputs/Outputs as part of machine wiring diagram?
Open-source control projects, related links.  topic
Posted by PhilC on 5 November, 2000 - 5:41 pm
EMC Info (Long)
The following is a copy of an email describing the development of NIST's EMC (Enhanced Machine Controller).
Open-source control projects, related links.  topic
Posted by Jiri Baum on 5 November, 2000 - 6:45 am
basic demo and synch
With the simple synch configuration now written (thanks, Mario), I'd suggest folding demo/basic_synch back into demo/basic.
PLCs and related questions. topic
Posted by jun laroco on 5 November, 2000 - 1:39 am
Modicon 584 Series PLC
logic modification of a Modicon 584 PLC
PLCs and related questions. topic
Posted by jun laroco on 5 November, 2000 - 1:31 am
AB PLC-2 Programming Software
AB PLC-2 programming software using notebook and cables to the plc
Open-source control projects, related links.  topic
Posted by Ken E. on 3 November, 2000 - 5:16 pm
Steeplechase VLC Timers description
Jiri,

This is from the VLC help file:
Communications systems and equipment. topic
Posted by Richard McMahon on 3 November, 2000 - 3:20 pm
What makes a protocol good?
We all know in our own minds what a good protocol is, but what are the factors that make protocols good.
Human-Machine Interface and SCADA. topic
Posted by John Guy on 3 November, 2000 - 2:11 pm
Cimplicity vs Wonderware
Comparison between Cimplicity and Wonderware
Sensor technologies. topic
Posted by A.KUNNI MALAI SAMY on 3 November, 2000 - 12:48 pm
Flame scanner development
Requirement of UV detector tube for flame scanner
PLCs and related questions. topic
Posted by McConnell, David P on 3 November, 2000 - 9:27 am
Power Control Relay for PLC Outputs
I would like to hear opinions regarding placing an "master power" control relay in the supply path to a PLC output module.
Continuous process industries, DCS questions. topic
Posted by David Griffith on 3 November, 2000 - 8:52 am
Well Pump Flow Monitoring
I want to view the totalized volumetric flow at a flow meter.
Human-Machine Interface and SCADA. topic
Posted by David Griffith on 3 November, 2000 - 8:44 am
Providing Easy Input & Output to HMI screens via the Internet
I need to select an HMI which provides the ability to view and interact with HMI screens via the internet.
Open-source control projects, related links.  topic
Posted by Harald Albrecht on 3 November, 2000 - 2:48 am
FS+OS conference (Was: Contributing)
> Well, Harald, Despite my ignorance of Linux
> affairs in Europe, I mean well :
Application Questions and Problems topic
Posted by Christopher Q on 2 November, 2000 - 8:01 pm
producing and supporting digital theaters
thoughts on organizing and managing setup, installation, testing, and on-going support of digital theater
Application Questions and Problems topic
Posted by Pierre R. Hinse CET on 2 November, 2000 - 2:49 pm
slip ring power connector
I am looking for manufacturers of slip rings.
The application I am faced with involves sending 120Vac across a ladder turret with full rotation motion.
Human-Machine Interface and SCADA. topic
Posted by Seth Yancey on 2 November, 2000 - 10:27 am
SYMBOL Bar code scanner with E300 eterminal
Please help if you have experience with using SYMBOL brand RS232 hand held barcode scanners with any Beijer eterminal.
Information resources, documentation. topic
Posted by ANTONISHEN Robert -CMMRCL SYS on 2 November, 2000 - 9:56 am
Looking for Industrial Hub
I'm looking for any source of industrial Ethernet hubs/switches, having up to 4 10BaseT with one BNC 10Base2 connector as well. Must be DC powered, and "rugged", i.e. screw terms on the power feed, not a phono jack, etc.
Information resources, documentation. topic
Posted by Herry Tamba on 2 November, 2000 - 9:34 am
Safety standards
Does anyone know about these numbering standards:
NEMA 4X, IEC IP67, EMI ( EN55011 ), EMS ( EN50082-2 ) and other numbering safety standards.
Open-source control projects, related links.  topic
Posted by Ken E. on 2 November, 2000 - 7:27 am
reply to philip's force suggestion.
I still like the concept of keeping force data in the IO table.
Open-source control projects, related links.  topic
Posted by Jiri Baum on 2 November, 2000 - 7:18 am
timer library
I've added lib/logic/timer. This is intended as a module-private timer, to be used, among other places, in the basic demo.
Open-source control projects, related links.  topic
Posted by Philip Costigan on 2 November, 2000 - 4:47 am
web page sugestion
I think we should probably change "PuffinPLC FAQ" on our web page to something like "PuffinPLC intro and specification".
Open-source control projects, related links.  topic
Posted by Harald Albrecht on 2 November, 2000 - 4:39 am
Free Software in Automation Industry Conference
As more and more mails are flooding my inbox, here's some more information.
PLCs and related questions. topic
Posted by Joseph Lamb on 1 November, 2000 - 7:23 pm
Need sample AB PLC5 Code for DeviceNet
Looking for code for 1771-SDN and CM12/CM11
Communications systems and equipment. topic
Posted by Dan Baker on 1 November, 2000 - 4:59 pm
PLC5/SLC Communications Software for Linux Uploaded
Open Source software (in perl) for communicating with Allen-Bradley PLC5's and all SLC500 series.
Tested under Linux, but may work in Windows too.
Read and write data using RS232, Ethernet, or
(Ethernet) to (ControlLogixGateway) to DH+.
Open-source control projects, related links.  topic
Posted by Ken E. on 1 November, 2000 - 4:53 pm
reply to Jiri's system level description
Thanks Jiri for Clarifying some of these issues.
Software, including programming, OS issues, etc. topic
Posted by Townsley, Bill on 1 November, 2000 - 3:58 pm
Win9x, WinNT, or Win2000
I am in the (very) preliminary steps of creating a new control system, and need to choose an OS ...
Open-source control projects, related links.  topic
Posted by Jiri Baum on 1 November, 2000 - 2:45 pm
Current status of IEC-61131-3 translator [was: What now? (flame bait)]
plc_pt_by_name() can handle such references now. ...
PLCs and related questions. topic
Posted by Bill Sturm on 1 November, 2000 - 1:36 pm
Fanuc 0MC ladder programming
Looking for some background on the Fanuc 0MC CNC. One of my clients is asking me to make some ladder logic changes ...
PLCs and related questions. topic
Posted by Dave van Rhijn on 1 November, 2000 - 1:34 pm
Pulse Modulation
Usefulness and successfulness of Pulse Width Modulation on logic controllers?
Motion control, servos, steppers, etc. topic
Posted by Perihan on 1 November, 2000 - 12:26 pm
Changing to AC motor
Changing from dc motor and drive to ac
Open-source control projects, related links.  topic
Posted by Campbell, David (Ex AS17) on 1 November, 2000 - 11:56 am
/logic/iec code changes... (IEC 61131-3 translator section)
An explanation of recent changes to /logic/iec directory:
Open-source control projects, related links.  topic
Posted by jackh on 1 November, 2000 - 11:20 am
System Architecture - Graphical Interface
I am now working on graphical programming tools for the LPC, and I could also set them up to produce files for the PuffinPLC.
Software, including programming, OS issues, etc. topic
Posted by Niall M Watson on 1 November, 2000 - 11:01 am
VB / Windows NT Security
Is it possible to access the logon name of the current workstation user in VB Runtime???
Application Questions and Problems topic
Posted by Ringo on 1 November, 2000 - 4:34 am
SPC Software Development
SPC Software Development
Open-source control projects, related links.  topic
Posted by Peter Whalley on 1 November, 2000 - 4:02 am
Contributing, was System Architecture ??
I think there is probably a simple answer to why so few people are contributing code. It's because they can't. ...
Software, including programming, OS issues, etc. topic
Posted by Santhiraj -Futura Electronics Pvt. Ltd on 1 November, 2000 - 4:02 am
GE-Fanuc LM90 software - how to use with Printer Port
GE-Fanuc Ladder logic s/w LM90 requires COMx port for communication with PLC from the host PC.
Is there any method to use parallel port for communication?
PLCs and related questions. topic
Posted by B.Van den Berghe on 1 November, 2000 - 4:02 am
Communication Problem, Siemens 115U 944B
When trying to go online withe a SIEMENS 115U the PG gives the error "Ungedefiniertes zeichen von der AS".
Human-Machine Interface and SCADA. topic
Posted by M. Faisal K. on 1 November, 2000 - 12:18 am
Can RSView Messenger send SMS?
Can RSView Messenger send Short Message Service (SMS) to mobile phone?
PLCs and related questions. topic
Posted by TJMURF on 31 October, 2000 - 6:11 pm
AB PID
What are the differences between the PID instruction in a SLC series processor and a PLC5/10?
Communications systems and equipment. topic
Posted by Pavel Topic on 31 October, 2000 - 5:38 pm
Atlas Copco - Elektronikon MkIII
MODBUS implementation of Elektronikon controller.
Application Questions and Problems topic
Posted by Mark Lucyk on 31 October, 2000 - 1:29 pm
plant electrical software ????
We are considering as-builting the entire electrical systems for a steel plant. Client now has electrical schematics and also uses Maximo for CMMS. Is there a reputable application for managing this type of system?
PLCs and related questions. topic
Posted by Matt on 31 October, 2000 - 1:06 pm
Switching from a Modicon 484 to Micro Logix 1500?
Considering changing from Modicon 484 to Micro Logix 1500. How difficult is conversion?
PLCs and related questions. topic
Posted by Lino Marques on 31 October, 2000 - 11:37 am
Communication protocol for Mitsubishi F1 series
I need the protocol for accessing the memory of the Mitsubishi F1 Series PLC
Sensor technologies. topic
Posted by Tecnicas y Tecnicas on 31 October, 2000 - 9:46 am
Ultrasonic Air Meter
Someone know where can I find a ultrasonic flow meter for air.
Application Questions and Problems topic
Posted by Daniel_Rallo on 31 October, 2000 - 9:40 am
Standard protocol for a LED Display Panel
I'm interested in interfacing LED displays with a PLC via a Standard Protocol like Modbus, MB+, Modbus ASCII or something like this to show data
or to generate messages in a packaging production line.
Human-Machine Interface and SCADA. topic
Posted by Mols J on 31 October, 2000 - 9:30 am
Fix event logging
How to log events on a fix application ?
Open-source control projects, related links.  topic
Posted by Curt Wuollet on 31 October, 2000 - 8:39 am
Linux in Automation
As I have mentioned here and on the automation list, the handwriting is on the wall. Check out what SquareD (aka Groupe Schnieder, Modicon Telemechanique) is doing:
wysiwyg://1228/http://alllinuxdevices.com/news_story.php3?ltsn=2000-10 -30-005-03-PL-RH
Open-source control projects, related links.  topic
Posted by David Nimmons on 31 October, 2000 - 7:28 am
WebHMI status
Here is a copy of the status report I just sent my boss, for you that are interested.
After spending the last two months researching the possibility of developing a web based interface to our Allen Bradley plc's, I am convinced that it is very doable. ...
Open-source control projects, related links.  topic
Posted by Ken Emmons on 31 October, 2000 - 5:42 am
System Architecture ??
I just want to comment on the system architecture. Everyone is busy trying to promote languages, interfaces to the PLC (telnet, XML, etc.), and even trying to document APIs and function calls. ...
Local and wide area networking in factory automation. topic
Posted by Franck JEANNE on 31 October, 2000 - 5:17 am
HMI and LINUX for LONWORKS?
I am student in France and I try to find informations about HMI and lonworks for my project. I would like to build a little home network (lonworks) controled by linux.
Software, including programming, OS issues, etc. topic
Posted by Rumjantsev Kirill on 31 October, 2000 - 4:36 am
SUL - libraries for Melsec Medoc Plus
Where I can find SUL-libraries for Melsec Medoc Plus (for A1SJ71E71 module, PID loops and other), if they exist?
Open-source control projects, related links.  topic
Posted by Ken Emmons on 30 October, 2000 - 9:38 pm
puffinbus ideas
First of all, I would like to compliment everyone involved in this project for their innovative ideas and contributions to "the cause". (Open source, and linux, etc.) Having said that ..... :o) I have been lurking around the list for a while and I am quite disturbed
by the threads I have read concerning the puffinbus ideas. ...
Sensor technologies. topic
Posted by Jim Reizner on 30 October, 2000 - 9:17 pm
Coriolis mass flow meter problem
Problem with coriolis mass flow meters and entrained air.
Information resources, documentation. topic
Posted by Ivan Turk on 30 October, 2000 - 5:01 pm
Free Comtext
Student looking for free version of Siemens Comtext
Open-source control projects, related links.  topic
Posted by Chris on 30 October, 2000 - 4:38 pm
BACnet driver
BACnet is a protocol used for Building Automation which might be a useful addition to the Linux PLC.
Sensor technologies. topic
Posted by Don on 30 October, 2000 - 3:18 pm
Flow Meter
Looking for a flow meter to be located in a remote area of the mill. It will be installed in a 10 inch line and measuring water flow but there is no power available. Needs to display GPMs and possibly totalize flow. Thanks...
Open-source control projects, related links.  topic
Posted by Harald Albrecht on 30 October, 2000 - 12:32 pm
... C++ headers, was Where we are (long)
> I think what you have to do is put an
> extern "C" { ... };
> around the C declarations. That's because
internally C++ uses some hairy
> Hungarian notation, so you have to tell it
that it's not there.
....
Information resources, documentation. topic
Posted by Stephen Wright on 30 October, 2000 - 10:18 am
Relays in presses
Are there standards for press control design and construction? Can anyone suggest a source for
relays that can be used in a press the strokes millions of times per year?
Continuous process industries, DCS questions. topic
Posted by jf on 30 October, 2000 - 9:42 am
Compensating drum level with drum pressure
what are the details to compensating drum level with drum pressure, i need formulas, curves, etc or where to find them. ...
Open-source control projects, related links.  topic
Posted by Mario de Sousa on 30 October, 2000 - 8:17 am
What now? (flame bait), was Where we are
Hugh Jack wrote:
> If anybody wants to use my code, feel free.

Thanks Hugh.

> If you are trying to patch in the SMM,
> it is best to do it through the 'io.cpp' file.

Actually I was thinking of taking out all the io stuff. ...
PLCs and related questions. topic
Posted by Mark on 30 October, 2000 - 7:22 am
Need to learn more about PROFIBUS.
In order for me to understand the way the integration and structure of PROFIBUS is achieved.
Open-source control projects, related links.  topic
Posted by Mario de Sousa on 30 October, 2000 - 5:53 am
New simplified syntax for configuring module synchronisation.
I have just committed some changes to the synch library that allow configuring module synchronisation using a simplified configuration
syntax.
Open-source control projects, related links.  topic
Posted by Philip Costigan on 29 October, 2000 - 7:08 pm
io linuxconf changes
I have just managed to alter the way io/modbus/linuxplc.conf is configured so that each io base can be called by a node name.
Open-source control projects, related links.  topic
Posted by Curt Wuollet on 29 October, 2000 - 4:04 pm
Where we are (long)
I have looked at all the responses both public and private to the questions I posed and the general state of things. As is usual with
a request of this type, I have been left with more questions than answers: I will start with my statements and then, sigh, some more questions.
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