Posts from...
Tuesday, August 3, 2004
Topic: Engineering and workplace issues.
from the EE department...
AC voltage to current converter
Originally posted by yohan on 3 August, 2004 - 4:48 pm
Is there some standard circuit I can find on the net that converts an AC voltage from a function generator to constant current?
New Replies:
I built a cct that takes the input of a AC current probe across a resistor (AC voltage) into a...
Topic: Engineering and workplace issues.
from the Automation List department...
solid state relay parallel operation
Originally posted by cem ayday on 30 July, 2004 - 2:28 pm
is it possible to wire in parallel two or more SSRs to have more current for ac switching application?
New Replies:
I had tried to use 2 40ADC SSR (Cryden) to control 80ADC. But I don't know it can be used in AC...
Topic: Engineering and workplace issues.
from the Automation List department...
Shielded Cables
Originally posted by Stefan on 30 July, 2004 - 2:57 pm
I want to post some questions about shielded cables uesd either for control or for power connections.
New Replies:
What kind of shielded cable?...
Topic: Continuous process industries, DCS questions.
from the Automation List department...
DCS system
Originally posted by Anonymous on 3 August, 2004 - 7:06 pm
What is the best dcs solution for a petrochemical plant utility?
New Replies:
Is it a new installation or an upgrade? and if its an upgrade, from what?...
Topic: Continuous process industries, DCS questions.
from the stop the real nerd department...
Electrical wiring color code standards
Originally posted by Larry Grayson on 3 August, 2004 - 4:05 pm
Looking for color standards for control wiring.
New Replies:
For all of the UL listed panels I have worked on, designed and such I used the following: Black...
This thread has been posted before and includes reference to several international standards. ...
Topic: Engineering and workplace issues.
from the Automation List department...
Flow Help Needed
Originally posted by Josh on 31 July, 2004 - 12:16 am
mass flow rate measurement help
New Replies:
Inexpensive DP devices can be used such as an orifice or flow nozzle. With a little electronics a...
For accuracy, I'd recommend a coriolis meter. MicroMotion is the more expensive, but other...
Topic: Information resources, documentation.
from the Automation List department...
Modicon 100-258
Originally posted by taverny on 30 June, 2003 - 10:53 pm
Trying to access the main menu of the control station TR130
New Replies:
From what I recall, the TR130 had a hardware based operating system. Email me if you still need...
Topic: PLCs and related questions.
from the Program department...
Siemens S7
Posted by Frustrated on 3 August, 2004 - 11:17 pm
Can anyone tell me how to get network blocks to switch from STL to Ladder logic
Topic: Sensor technologies.
from the Automation List department...
iron bar detection
Originally posted by Vasilios Karavidas on 3 August, 2004 - 5:01 pm
can anyone help me with the detection of the presence of iron bar?
New Replies:
CanŽt you use an inductive sensor? The diameter of the sensor gives you the detection distance. ...
Topic: Engineering and workplace issues.
from the Automation List department...
Transformer description
Posted by John on 3 August, 2004 - 9:59 pm
Transformer description
Topic: PLCs and related questions.
from the Help! department...
PLC software for Mitsubishi PLC
Originally posted by Monti on 2 August, 2004 - 11:31 pm
Just fooling around with various PLCs
New Replies:
Monti, If you contact the distributor from whom you purchased the software and they have a...
By Laddie R. Boone on 3 August, 2004 - 9:37 pm -
The cable you're looking for is SC09. It contains a RS232/RS485 converter and ends with a mini-din...
Topic: Continuous process industries, DCS questions.
from the SAMA diagrams department...
Visio stencils
Originally posted by Steve P on 8 October, 2003 - 10:23 pm
Does anyone know of where I can download a stencil for Visio which gives SAMA symbols for functional diagramming of instruments and control systems?
New Replies:
Went to the cafe and didn't find anything that resembled the symbol set... regards...
Yes... goto: http://www.visiocafe.com...
Topic: Sensor technologies.
from the Automation List department...
Optical Measurement of a Tinting Process
Originally posted by Tom Smith on 3 August, 2004 - 12:03 am
I would like to measure the optical transmission of tinted plastic panels during a hot-water tinting process.
New Replies:
If the panels must be measured while submerged in the dye, then you need to take into account the...
Inverse square law doesn't apply to a collimated beam so that is easily overcome with lenses. ...
Topic: PLCs and related questions.
from the Automation List department...
Cheap PLC
Originally posted by Marko on 26 July, 2004 - 4:59 pm
What to companies do with their obsolete S5 PLCs?
New Replies:
By Laddie R. Boone on 3 August, 2004 - 9:48 pm -
There are a great many PLC's on the ebay site. Just about every brand is represented, but I...
Try Ebay Business....
Topic: PLCs and related questions.
from the Automation List department...
Indirect addressing on Modicon Quantum Using ProWORX NxT
Originally posted by andy on 3 August, 2004 - 12:00 am
Is there a indirect addressing syntax that I'm not aware of.
New Replies:
Got it figured out using one network and a few T->R BLKM and SUB blocks. About the indirect...
Topic: PLCs and related questions.
from the It won't Fit! department...
S5 928B out of memory
Originally posted by Glen Boston on 31 July, 2004 - 2:07 pm
Program is too big and growing...
New Replies:
Thanks for the info guys. I'm still not clear how to view actual memory usage. If I look at...
Topic: Software, including programming, OS issues, etc.
from the Automation List department...
RS485 half Duplex Communication
Posted by Dhillon on 3 August, 2004 - 9:33 pm
Need help in setting up serial port for RS485 half duplex communications
Topic: Motion control, servos, steppers, etc.
from the serious department...
How to use VB for programming
Posted by Irene on 3 August, 2004 - 9:30 pm
I need some advice on how to use VB to program hctl1100 controller to run a dc motor... 10x!
Topic: Application Questions and Problems
from the Shocking department...
Current 1000A to 4-20 mA
Originally posted by Bhartesh Doshi on 21 July, 2004 - 11:28 pm
Can anybody suggest a signal conditioner which can convert up to 1000 A to 4-20mA signal?
New Replies:
Take a look at: http://www.currentmonitoring.com There are a lot of options (single/multi...
Topic: Engineering and workplace issues.
from the Process Automation department...
RSlogix software
Originally posted by Khalid Faridi on 1 August, 2004 - 1:00 pm
Need the configuration software for SLC 5/03 from AB as I have to execute a project and would like to train myself and the team before purchasing...
New Replies:
I have seen it on Ebay.com from time to time. Do this instead of paying allen-bradley's ridiculous...
Hi, The 5/03 is a very old, and (especially outside the usa) over-priced plc, If it is a new...
have you already checked with your Allen-Bradley distributor? if they know that you're committed to...
You can download software from WWW.ab.com/automation, but u can not run it as it requires the...
Topic: PLCs and related questions.
from the Puzzled department...
Modbus Comms
Posted by P. Borgman on 3 August, 2004 - 9:22 pm
Established comms - can't work out alarms!
Topic: PLCs and related questions.
from the Automation List department...
Modicon PLC 984-145 and Communications
Originally posted by jb on 28 July, 2004 - 5:13 pm
I need to communicate remotely [modem] with a modicon 984-145 CPU
New Replies:
Hi There, I'm back again with another query on the above. In the modsoft topic Config, Ports,...
Topic: Communications systems and equipment.
from the something working software needed department...
Modbus/TCP tester tool
Posted by Anonymous on 3 August, 2004 - 9:11 pm
Need tool for testing Modbus/TCP functions
Topic: Application Questions and Problems
from the Automation List department...
Remote Data Logging
Originally posted by James, William on 28 July, 2004 - 12:42 pm
I have a need to do some isolated temperature data logging. Since I have available an I-PAQ pocket PC, I would like to use it as the data collector.
New Replies:
Thanks for the thoughtful response. I prefer the PLC approach, but in a hospital environment the...
Topic: Sensor technologies.
from the Automation List department...
Proximity sensor
Originally posted by Anonymous on 18 June, 2004 - 9:13 am
I am making a proximity sensor for my GCSE project. I need suggestions on how to do this but I prefer it if it is simple
New Replies:
hi you can use either an ldr or a photo diode or photo transistor to have a non-contact...
Topic: Motion control, servos, steppers, etc.
from the maintenance department...
transformer unbalance voltage
Originally posted by jaibadri on 30 May, 2004 - 12:56 pm
what may be the reasons for unbalance voltage in transformer secondary side?
New Replies:
its a furnace transformer with 10 taps and voltage is from 250 to 400v.phase to phase voltage dont...
Topic: Engineering and workplace issues.
from the Automation List department...
DCS implementation
Posted by Anonymous on 3 August, 2004 - 7:29 pm
i am trying to implement a DCS using 89c51 and a pc.
Topic: PLCs and related questions.
from the Technical Services department...
Modicon PLC Training
Originally posted by S.I. Karofi on 3 August, 2004 - 12:10 am
Modicon PLC training for maintenance personnel
New Replies:
Have you contacted the Schneider Electric office in Lagos? Biro Plaza 8th floor. Plot 634...
Topic: Application Questions and Problems
from the Help!!!!!! department...
Absolute Encoder Problem
Originally posted by DoubleL on 1 August, 2004 - 12:37 pm
I am on a new equipment installation and we are using an Allen Bradley 845G Absolute 10 bit Gray Code encoder connected to a 1794-IV16 24VDC Sourcing Flex I/O Input Module talking thru ControlNet to a ControlLogix PLC...
New Replies:
One problem is that the inputs are not fast enough. They probably have some sort of RC filter on...
By Michael R. Batchelor on 3 August, 2004 - 4:27 pm -
Are you sure you have the conversion correct? Remember that you have to invert the bits from the...
Topic: PLCs and related questions.
from the Siemens S7 Programming department...
Passing a UDT/Struct to a FC/FB in Siemens S7
Posted by Anonymous on 3 August, 2004 - 7:24 pm
I have an application where I have an FC with a UDT as in input parameter. When I call the FC I cannot seem correctly pass the structure to the FC.
Topic: Continuous process industries, DCS questions.
from the Service department...
Proportional valve and PWM
Originally posted by Alfred Tang on 20 May, 2004 - 12:06 am
Proportional valve and its controller
New Replies:
If you will use PWM higher frequency (10 kHz or more) that will make as equivalent to analog...
Topic: Software, including programming, OS issues, etc.
from the Automation List department...
Data Trender/Historian/Web access
Originally posted by Bob Gantt on 29 July, 2004 - 10:25 pm
Low cost software for trending/data logging/web access
New Replies:
You should take a look at GENESIS32 from ICONICS. This HMI package is a robust OPC client and...
Thanks for your help, Paul, IŽll certainly look into AutomationX. And yes, technically speaking we...
Topic: Information resources, documentation.
from the Automation List department...
Embedded systems training
Originally posted by P. Samuthira Pandi on 13 May, 2004 - 6:46 pm
I want to have a training in embedded systems in India.
New Replies:
Dear Pandi Try in Dapper Technologies,Bangalore-43 You will be able to work with the...
Topic: Sensor technologies.
from the I'll Drive My Car if You'll Drive Yours department...
What good is a tailgate detector?
Originally posted by Brian Spaulding on 17 July, 2004 - 1:16 am
If I could sense a tailgater behind my car, what would I do about it?
New Replies:
you could light your tail lamps as if you were on brakes so that the car from behind should be...
Topic: Motion control, servos, steppers, etc.
from the help!!!! department...
DC motor control under Linux
Originally posted by mc99044 on 21 July, 2004 - 2:57 pm
Timer in a c program (Linux OS)
New Replies:
Hello, Take a look at and/or contact the Orocos and/or LinuxCNC projects - they both had to do...
Topic: Application Questions and Problems
from the Electronic Circuits department...
100MHz Pulse Counting
Originally posted by Lokesh Jain on 21 July, 2004 - 2:35 pm
how to measure the time elapsed between the two events of the order of 0.01 microsecond from 1 microsecond to 100 microsecond?
New Replies:
First of all it is necessary to choose a method for such measurement, than - a possible realization...
Topic: Application Questions and Problems
from the Automation List department...
DDC VS PLC
Originally posted by piyo on 29 July, 2004 - 12:41 pm
I am new in the field of automation. Could anybody tell me the difference between PLC and DDC?
New Replies:
By Dr ir Gerrit M. van der Molen on 3 August, 2004 - 7:07 pm -
Hi Piyo See this previous thread as well: http://www.control.com/1026171717/index_html ...
Topic: Information resources, documentation.
from the need to know department...
function codes for a hitachi hizac E series?
Originally posted by Bob-wd8bdn on 1 July, 2004 - 1:17 am
I have a project of updating a machine with a new PLC. The PLC currently in the machine is a Hitachi Hizac E. I don't have the software or cable and will be installing an A-B 1200 series in it.
New Replies:
By Terry Hutson - Your Friendly Hitachi Engineer on 3 August, 2004 - 5:02 pm -
DIF 00 202 - This is the instruction used to detect a rising edge of an input. When the input of...
Topic: PLCs and related questions.
from the 4 department...
Quantum hot standby
Posted by @(O_O)@ on 3 August, 2004 - 4:59 pm
testing Quantum hot standby!!
Topic: Communications systems and equipment.
from the Help... department...
Modbus Plus to Modbus TCP/IP
Originally posted by Amir Ellenbogen on 1 August, 2004 - 12:08 pm
I Need a Hardware Protocol translator from Modbus Plus to Modbus TCP/IP...
New Replies:
You may use the protocol converter from Ipcas at http://www.ipcas.de....
Amir, ProSoft Technology has a Modbus Plus to Modbus TCP/IP communications gateway. You can...
Topic: PLCs and related questions.
from the Automation List department...
Siemens OPC server - latest version
Posted by Damian on 3 August, 2004 - 4:55 pm
Step-by-step for getting latest Siemens OPC server working correctly
Topic: Communications systems and equipment.
from the Timestamp of tags department...
iFix OPC communication
Originally posted by Sreeni T S on 1 August, 2004 - 11:19 am
How to retrieve timestamp of process tags from an OPC server through the iFix OPC client?
New Replies:
Dear Jim, Thank you very much for your response. Further investigation from my end has validated...
Topic: PLCs and related questions.
from the Automation List department...
Controllogix Ethernet connection to Plantscape
Posted by Paul Kelly on 3 August, 2004 - 4:49 pm
Has anyone made a ethernet connection between
honeywell plantscape and a controllogix 5550 PLC?
Topic: Software, including programming, OS issues, etc.
from the ControlSoft Wiz needed here! department...
OPC Server Chronos Richardson weight controller
Originally posted by Rpiedra on 16 April, 2004 - 5:49 pm
Need to find a OPC Server (software) for Chronos Richardson weight controller Chrono-Tronic SpeedAC 8. It has RS-485 serial port but dont know comm protocol
New Replies:
Hi, I need the same information for SpeedAC 7/8. According to your web site, SpeedAC supports...
Topic: PLCs and related questions.
from the Automation List department...
Strategies about PLC
Posted by Luis Alvarado on 3 August, 2004 - 4:46 pm
defining strategies about PLC in next five years
Topic: Communications systems and equipment.
from the Automation List department...
Communication between Modbus and MB+?
Posted by Weifeng Cao on 3 August, 2004 - 4:46 pm
Using ABB AC800M controller to communicate with Modbus Plus device
Topic: Application Questions and Problems
from the Electrical engineering department...
Signal Generator
Originally posted by yohan on 1 August, 2004 - 12:47 pm
My question is: If a function generator sinusoid can be used as a constant current source. I am trying to confirm my own thoughts about it.
New Replies:
Probably just being dense, but constant currents & sine waves seem to be mutualy exclusive? ...
Topic: PLCs and related questions.
from the Automation department...
AB PLC - SLC 15/01
Posted by Edgar on 3 August, 2004 - 4:39 pm
Where can I get any info or manuals or ActiveX to connect vb to a AB PLC - SLC5/01?
Topic: PLCs and related questions.
from the Automation List department...
S7 300 and Profibus
Originally posted by john V on 1 August, 2004 - 11:54 am
I have 2 S7 315-2D. I want to connect them on a Profibus (One master one slave). I can't understand what function I should use to communicate between the 2 CPU's...
New Replies:
Hi Firstly you need to configure the hardware in the hardware configuration tool of the simatic...
Posted by Alan 1950 on 3 August, 2004 - 4:30 pm
I think there is a need for International mandatory regulations for Hazardous Area Classification (HAC) on ALL International Oil/Gas Pipelines...
Topic: Continuous process industries, DCS questions.
from the Novice Control Department department...
Level Measurement in a froth filled application
Originally posted by Steve on 29 July, 2004 - 11:35 am
I'm looking for feedback on level measurement instrumentation for use with a highly aerated slurry application, with potential lots of froth / bubbling.
New Replies:
If there is no agitator, I'd look into a stilling well with either a float or guided wave radar....
Steve, You can use some types of ultrasonic level measurement as long as they have the power...
Topic: The Business of Automation and Control
from the Automation List department...
Interested in automation
Originally posted by David on 12 April, 2004 - 9:45 pm
I was wondering if I could get some advice on getting in the automation field?
New Replies:
Turn around and run as fast as you can. Everyone looks at PLC logic and thinks they can do it and...
Topic: Programming languages.
from the Automation List department...
Modbus Autodetect Function
Originally posted by Kevin on 23 July, 2004 - 7:36 pm
I'm developing a KWh datalogger running on RS485 MODBUS RTU protocol based on microcontroller.
New Replies:
No suggestion, just a comment. I give you a valuable piece of advice and you complain about it. ...
Topic: Continuous process industries, DCS questions.
from the Porsche, Merc., Ferrari, Lambo... car nutters, this could beinteresting 4U department...
PID/FUZZY competition: I pay US $50!!
Originally posted by Rudi on 19 February, 2004 - 5:48 pm
PID or FUZZY control required: minimal overshoot, fast response, slow responding plant... so controller must start acting before the setpoint triggers the error signal... self learning would be nice, or read from a
data table.
New Replies:
Is this $50.00 for steering you in the right direction or do I have to give you something original?...
Topic: Continuous process industries, DCS questions.
from the Automation List department...
mass flow measurement
Posted by ae.siavoshi on 3 August, 2004 - 4:18 pm
flow measurment in low scale
Topic: PLCs and related questions.
from the Automation List department...
Siemens s5 / s7 online training
Originally posted by s.mcguinness on 22 July, 2004 - 1:40 am
i am looking to learn more on p.l.c. programming
New Replies:
Is there anyone who knows where I can find the official announcement from Siemens about...
Topic: Motion control, servos, steppers, etc.
from the Basic Info Needed department...
Controllers for Capacitor Start Motors
Originally posted by Clueless Research Assistant on 15 July, 2004 - 11:29 am
I need some basic information on capacitor start electric motors. i have a motor that I know nothing about and want to know if i can use it and how to control it.
New Replies:
Check an industrial mail-order catalog like Grainger for a single-phase motor speed controller....
Topic: PLCs and related questions.
from the Help... department...
Programing Telemecanique + Modicon PLC's
Originally posted by Amir Ellenbogen on 1 August, 2004 - 12:12 pm
Is it possible to program the Telemecanique 140-CPU-651-50/651-60/671-60 with concept 2.6?
New Replies:
Much to my own disappointment, no it's not possible to program the Unity PLCs 651/671s with Concept...
1. No, Concept does not support them. 2. Yes, just re-flash them. The newer CPUs are Unity only...
Topic: PLCs and related questions.
from the Engineering department...
Modicon 584 Series PLC
Originally posted by jun laroco on 5 November, 2000 - 1:39 am
logic modification of a Modicon 584 PLC
New Replies:
By Mr Andrew Duke(UK) on 3 August, 2004 - 2:26 pm -
Please contact me as we have lots of info plus over 200 spare units. Andy Duke...
Topic: Engineering and workplace issues.
from the Looking for good homes department...
Evans' Spirule
Originally posted by Anonymous on 10 June, 2004 - 7:12 pm
I have 9 Spirules that are regretably redundant.
New Replies:
yes, I would like one. My e mail address is lcb17@hotmail.com...
Topic: The Business of Automation and Control
from the Automation List department...
JimPinto.com eNews - 2 August 2004
Posted by Jim Pinto on 3 August, 2004 - 12:19 am
The latest JimPinto.com eNews - 2 August 2004 is on the web...
Topic: Continuous process industries, DCS questions.
from the Automation List department...
Exothermic Control Variations
Originally posted by ControlNovice on 28 July, 2004 - 5:16 pm
Different opinions on Exothermic Batch Control - any experience out there?
New Replies:
Wes: I'm out of Columbus, OH working on a new facility overseas - so don't have any historical...
Thanks Novartis: We do almost the same thing at an existing plant that is non-exothermic. ...
Topic: Continuous process industries, DCS questions.
from the DCS, Power Plant department...
ABB's Conductor NT 4.0 Trend loss
Posted by Anonymous on 3 August, 2004 - 12:03 am
Trend gap (1 minute or some time more) in trend display window in Conductor NT.

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