Posts from...Tuesday, August 3, 2004
from the EE department...AC voltage to current converter
Is there some standard circuit I can find on the net that converts an AC voltage from a function generator to constant current?
By D Brown on 3 August, 2004 - 11:32 pm -
I built a cct that takes the input of a AC current probe across a resistor (AC voltage) into a...
from the Automation List department...solid state relay parallel operation
is it possible to wire in parallel two or more SSRs to have more current for ac switching application?
By Anonymous on 3 August, 2004 - 11:32 pm -
I had tried to use 2 40ADC SSR (Cryden) to control 80ADC. But I don't know it can be used in AC...
from the Automation List department...Shielded Cables
I want to post some questions about shielded cables uesd either for control or for power connections.
By Anonymous on 3 August, 2004 - 11:30 pm -
What kind of shielded cable?...
from the Automation List department...DCS system
What is the best dcs solution for a petrochemical plant utility?
By D Brown on 3 August, 2004 - 11:29 pm -
Is it a new installation or an upgrade? and if its an upgrade, from what?...
from the stop the real nerd department...Electrical wiring color code standards
Looking for color standards for control wiring.
By Matthew Hyatt on 3 August, 2004 - 11:26 pm -
For all of the UL listed panels I have worked on, designed and such I used the following: Black...
By Verhappen, Ian on 3 August, 2004 - 9:54 pm -
This thread has been posted before and includes reference to several international standards. ...
from the Automation List department...Flow Help Needed
mass flow rate measurement help
By Standard Plan on 3 August, 2004 - 11:22 pm -
Inexpensive DP devices can be used such as an orifice or flow nozzle. With a little electronics a...
By ControlNovice on 3 August, 2004 - 4:30 pm -
For accuracy, I'd recommend a coriolis meter. MicroMotion is the more expensive, but other...
from the Automation List department...Modicon 100-258
Trying to access the main menu of the control station TR130
By Jeff on 3 August, 2004 - 11:22 pm -
From what I recall, the TR130 had a hardware based operating system. Email me if you still need...
from the Program department...Siemens S7
Can anyone tell me how to get network blocks to switch from STL to Ladder logic
from the Automation List department...iron bar detection
can anyone help me with the detection of the presence of iron bar?
By Alvaro Mola on 3 August, 2004 - 10:00 pm -
CanŽt you use an inductive sensor? The diameter of the sensor gives you the detection distance. ...
from the Automation List department...Transformer description
from the Help! department...PLC software for Mitsubishi PLC
Just fooling around with various PLCs
By Steve Myres on 3 August, 2004 - 9:55 pm -
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...
from the SAMA diagrams department...Visio stencils
Does anyone know of where I can download a stencil for Visio which gives SAMA symbols for functional diagramming of instruments and control systems?
By Dave on 3 August, 2004 - 9:50 pm -
Went to the cafe and didn't find anything that resembled the symbol set... regards...
By ac on 3 August, 2004 - 4:42 pm -
Yes... goto: http://www.visiocafe.com...
from the Automation List department...Optical Measurement of a Tinting Process
I would like to measure the optical transmission of tinted plastic panels during a hot-water tinting process.
By Robert Scott on 3 August, 2004 - 9:48 pm -
If the panels must be measured while submerged in the dye, then you need to take into account the...
By dooley on 3 August, 2004 - 7:27 pm -
Inverse square law doesn't apply to a collimated beam so that is easily overcome with lenses. ...
from the Automation List department...Cheap PLC
What to companies do with their obsolete S5 PLCs?
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...
By Tommy D. on 3 August, 2004 - 9:33 pm -
Try Ebay Business....
from the Automation List department...Indirect addressing on Modicon Quantum Using ProWORX NxT
Is there a indirect addressing syntax that I'm not aware of.
By Anonymous on 3 August, 2004 - 9:40 pm -
Got it figured out using one network and a few T->R BLKM and SUB blocks. About the indirect...
from the It won't Fit! department...S5 928B out of memory
Program is too big and growing...
By Glen Boston on 3 August, 2004 - 9:40 pm -
Thanks for the info guys. I'm still not clear how to view actual memory usage. If I look at...
from the Automation List department...RS485 half Duplex Communication
Need help in setting up serial port for RS485 half duplex communications
from the serious department...How to use VB for programming
I need some advice on how to use VB to program hctl1100 controller to run a dc motor... 10x!
from the Shocking department...Current 1000A to 4-20 mA
Can anybody suggest a signal conditioner which can convert up to 1000 A to 4-20mA signal?
By Nick on 3 August, 2004 - 9:30 pm -
Take a look at: http://www.currentmonitoring.com There are a lot of options (single/multi...
from the Process Automation department...RSlogix software
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...
By Anonymous on 3 August, 2004 - 9:25 pm -
I have seen it on Ebay.com from time to time. Do this instead of paying allen-bradley's ridiculous...
By marc sinclair on 3 August, 2004 - 4:34 pm -
Hi, The 5/03 is a very old, and (especially outside the usa) over-priced plc, If it is a new...
By Ron Beaufort on 3 August, 2004 - 3:30 pm -
have you already checked with your Allen-Bradley distributor? if they know that you're committed to...
By Anonymous on 3 August, 2004 - 12:26 am -
You can download software from WWW.ab.com/automation, but u can not run it as it requires the...
from the Puzzled department...Modbus Comms
Established comms - can't work out alarms!
from the Automation List department...Modicon PLC 984-145 and Communications
I need to communicate remotely [modem] with a modicon 984-145 CPU
By Anonymous on 3 August, 2004 - 9:20 pm -
Hi There, I'm back again with another query on the above. In the modsoft topic Config, Ports,...
from the something working software needed department...Modbus/TCP tester tool
Need tool for testing Modbus/TCP functions
from the Automation List department...Remote Data Logging
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.
By Bill James on 3 August, 2004 - 9:10 pm -
Thanks for the thoughtful response. I prefer the PLC approach, but in a hospital environment the...
from the Automation List department...Proximity sensor
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
By j naidu on 3 August, 2004 - 7:38 pm -
hi you can use either an ldr or a photo diode or photo transistor to have a non-contact...
from the maintenance department...transformer unbalance voltage
what may be the reasons for unbalance voltage in transformer secondary side?
By Anonymous on 3 August, 2004 - 7:30 pm -
its a furnace transformer with 10 taps and voltage is from 250 to 400v.phase to phase voltage dont...
from the Automation List department...DCS implementation
i am trying to implement a DCS using 89c51 and a pc.
from the Technical Services department...Modicon PLC Training
Modicon PLC training for maintenance personnel
By Brian Cervi on 3 August, 2004 - 7:27 pm -
Have you contacted the Schneider Electric office in Lagos? Biro Plaza 8th floor. Plot 634...
from the Help!!!!!! department...Absolute Encoder Problem
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...
By William Sturm on 3 August, 2004 - 7:25 pm -
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...
from the Siemens S7 Programming department...Passing a UDT/Struct to a FC/FB in Siemens S7
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.
from the Service department...Proportional valve and PWM
Proportional valve and its controller
By Anonymous on 3 August, 2004 - 7:21 pm -
If you will use PWM higher frequency (10 kHz or more) that will make as equivalent to analog...
from the Automation List department...Data Trender/Historian/Web access
Low cost software for trending/data logging/web access
By Tim Donaldson on 3 August, 2004 - 7:21 pm -
You should take a look at GENESIS32 from ICONICS. This HMI package is a robust OPC client and...
By Bob Gantt on 3 August, 2004 - 12:25 am -
Thanks for your help, Paul, IŽll certainly look into AutomationX. And yes, technically speaking we...
from the Automation List department...Embedded systems training
I want to have a training in embedded systems in India.
By Priya on 3 August, 2004 - 7:13 pm -
Dear Pandi Try in Dapper Technologies,Bangalore-43 You will be able to work with the...
from the I'll Drive My Car if You'll Drive Yours department...What good is a tailgate detector?
If I could sense a tailgater behind my car, what would I do about it?
By Anonymous on 3 August, 2004 - 7:13 pm -
you could light your tail lamps as if you were on brakes so that the car from behind should be...
from the help!!!! department...DC motor control under Linux
Timer in a c program (Linux OS)
By Jiri Baum on 3 August, 2004 - 7:10 pm -
Hello, Take a look at and/or contact the Orocos and/or LinuxCNC projects - they both had to do...
from the Electronic Circuits department...100MHz Pulse Counting
how to measure the time elapsed between the two events of the order of 0.01 microsecond from 1 microsecond to 100 microsecond?
By syurish on 3 August, 2004 - 7:10 pm -
First of all it is necessary to choose a method for such measurement, than - a possible realization...
from the Automation List department...DDC VS PLC
I am new in the field of automation. Could anybody tell me the difference between PLC and DDC?
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 ...
from the need to know department...function codes for a hitachi hizac E series?
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.
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...
from the Help... department...Modbus Plus to Modbus TCP/IP
I Need a Hardware Protocol translator from Modbus Plus to Modbus TCP/IP...
By Anonymous on 3 August, 2004 - 4:59 pm -
You may use the protocol converter from Ipcas at http://www.ipcas.de....
By CH on 3 August, 2004 - 4:39 pm -
Amir, ProSoft Technology has a Modbus Plus to Modbus TCP/IP communications gateway. You can...
from the Automation List department...Siemens OPC server - latest version
Step-by-step for getting latest Siemens OPC server working correctly
from the Timestamp of tags department...iFix OPC communication
How to retrieve timestamp of process tags from an OPC server through the iFix OPC client?
By Sreeni T S on 3 August, 2004 - 4:55 pm -
Dear Jim, Thank you very much for your response. Further investigation from my end has validated...
from the Automation List department...Controllogix Ethernet connection to Plantscape
Has anyone made a ethernet connection between
honeywell plantscape and a controllogix 5550 PLC?
honeywell plantscape and a controllogix 5550 PLC?
from the ControlSoft Wiz needed here! department...OPC Server Chronos Richardson weight controller
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
By Edy Sucipto on 3 August, 2004 - 4:49 pm -
Hi, I need the same information for SpeedAC 7/8. According to your web site, SpeedAC supports...
from the Automation List department...Strategies about PLC
defining strategies about PLC in next five years
from the Automation List department...Communication between Modbus and MB+?
Using ABB AC800M controller to communicate with Modbus Plus device
from the Electrical engineering department...Signal Generator
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.
By T Hudson on 3 August, 2004 - 4:42 pm -
Probably just being dense, but constant currents & sine waves seem to be mutualy exclusive? ...
from the Automation department...AB PLC - SLC 15/01
Where can I get any info or manuals or ActiveX to connect vb to a AB PLC - SLC5/01?
from the Automation List department...S7 300 and Profibus
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...
By Andrew Hawdon on 3 August, 2004 - 4:34 pm -
Hi Firstly you need to configure the hardware in the hardware configuration tool of the simatic...
from the Automation List department...International Regulations for Hazardous Area Classifications
I think there is a need for International mandatory regulations for Hazardous Area Classification (HAC) on ALL International Oil/Gas Pipelines...
from the Novice Control Department department...Level Measurement in a froth filled application
I'm looking for feedback on level measurement instrumentation for use with a highly aerated slurry application, with potential lots of froth / bubbling.
By ControlNovice on 3 August, 2004 - 4:26 pm -
If there is no agitator, I'd look into a stilling well with either a float or guided wave radar....
By Bob Langie on 3 August, 2004 - 2:26 pm -
Steve, You can use some types of ultrasonic level measurement as long as they have the power...
from the Automation List department...Interested in automation
I was wondering if I could get some advice on getting in the automation field?
By Frank on 3 August, 2004 - 4:23 pm -
Turn around and run as fast as you can. Everyone looks at PLC logic and thinks they can do it and...
from the Automation List department...Modbus Autodetect Function
I'm developing a KWh datalogger running on RS485 MODBUS RTU protocol based on microcontroller.
By Max Power on 3 August, 2004 - 4:22 pm -
No suggestion, just a comment. I give you a valuable piece of advice and you complain about it. ...
from the Porsche, Merc., Ferrari, Lambo... car nutters, this could beinteresting 4U department...PID/FUZZY competition: I pay US $50!!
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
By femitchell on 3 August, 2004 - 4:19 pm -
Is this $50.00 for steering you in the right direction or do I have to give you something original?...
from the Automation List department...mass flow measurement
flow measurment in low scale
from the Automation List department...Siemens s5 / s7 online training
i am looking to learn more on p.l.c. programming
By wirebitersmith on 3 August, 2004 - 4:14 pm -
Is there anyone who knows where I can find the official announcement from Siemens about...
from the Basic Info Needed department...Controllers for Capacitor Start Motors
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.
By Anonymous on 3 August, 2004 - 4:14 pm -
Check an industrial mail-order catalog like Grainger for a single-phase motor speed controller....
from the Help... department...Programing Telemecanique + Modicon PLC's
Is it possible to program the Telemecanique 140-CPU-651-50/651-60/671-60 with concept 2.6?
By Francis on 3 August, 2004 - 3:31 pm -
Much to my own disappointment, no it's not possible to program the Unity PLCs 651/671s with Concept...
By Roland on 3 August, 2004 - 12:14 am -
1. No, Concept does not support them. 2. Yes, just re-flash them. The newer CPUs are Unity only...
from the Engineering department...Modicon 584 Series PLC
logic modification of a Modicon 584 PLC
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...
from the Looking for good homes department...Evans' Spirule
I have 9 Spirules that are regretably redundant.
By Anonymous on 3 August, 2004 - 12:24 am -
yes, I would like one. My e mail address is firstname.lastname@example.org...
from the Automation List department...JimPinto.com eNews - 2 August 2004
The latest JimPinto.com eNews - 2 August 2004 is on the web...
from the Automation List department...Exothermic Control Variations
Different opinions on Exothermic Batch Control - any experience out there?
By ControlNovice on 3 August, 2004 - 12:13 am -
Wes: I'm out of Columbus, OH working on a new facility overseas - so don't have any historical...
By ControlNovice on 3 August, 2004 - 12:00 am -
Thanks Novartis: We do almost the same thing at an existing plant that is non-exothermic. ...
from the DCS, Power Plant department...ABB's Conductor NT 4.0 Trend loss
Trend gap (1 minute or some time more) in trend display window in Conductor NT.
Did I say 2? I lied.