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mixing protocols
Posted by Greg Goodman on 16 March, 2001 - 7:08 pm
> Normally devices ignore transmissions they do not understand. ....< Depends on the protocol. Many protocols specify that a device ignore transmissions not addressed to it, and return error responses or retransmit requests in response to messages that appear to be addressed to it, but which are not valid. ...
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How to use Continental industries, Inc's ODC 5 RM.
Posted by Steve on 16 March, 2001 - 5:58 pm
I have an I/O module ODC 5 RM. I would like to know how can I find the technical specification? or how to use it in Control?
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Hyperterminal
Posted by Kevin on 16 March, 2001 - 3:04 pm
Paging Headaches
5
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Siemens variable frequency drives and RF noise
Posted by Dan Kalla on 16 March, 2001 - 3:01 pm
What to do about RF noise?
4
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Industrial PCs
Posted by Ranjan Acharya on 16 March, 2001 - 2:28 pm
A customer of ours has to buy an industrial PC for shop-floor debugging of control systems ...
4
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220 V Control power
Posted by Bob Peterson on 16 March, 2001 - 2:24 pm
This is a wierd one. has anyone every heard of 3 wire/220 V control power before.
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automated produce selection
Posted by mark v ray on 16 March, 2001 - 2:20 pm
does anyone know of some equipment that is used to select or grade oranges? i do not mean sizers ...
An invitation
Posted by Murry Shohat on 16 March, 2001 - 12:10 pm
Another lurker speaks and invites. This is an invitation to list subscribers to partcipate in an important meeting regarding standards for embedded Linux. ...
4
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Noise Reduction in CNC environment
Posted by S.Jamal Sadreddini on 16 March, 2001 - 4:04 am
I am working with 3 Heidenhain Linear Encoder for controlling a Horizontall Boring, but I have a few problem in establishing true Encoder pulses form Noises specially when the Spindle turns on.
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Communications, OPC, the whole ball of wax; was connectivity (OPC)
Posted by Jeff Dean on 16 March, 2001 - 1:08 am
Ok, I've kept a sock in my mouth for quite a while now... as Curt (and those that follow the Automation list ) know I'm not very keen on Linux and Open Source. But with the recent rash of email on this subject it's become an eyesore looking at my inbox . So if I can remove some mud from the water of this discussion I think everyone will benefit. :) ...
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What does OPC mean ?
Posted by Raymundo D. Balderas on 15 March, 2001 - 8:55 pm
I need a little help -- I don´t know what OPC means and what I can do with it.
Changeover Relay for Switching Modbus (RS485) Signals
Posted by Phillip Kristensen on 15 March, 2001 - 8:49 pm
Changeover Relay for Switching Modbus (RS485) Signals
How to Check PH meter connections ?
Posted by Roberto on 15 March, 2001 - 6:10 pm
Connection diagram needed...
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LCD
Posted by JM on 15 March, 2001 - 4:23 pm
Looking for some NEMA 4X LCDs for a Honeywell system. Any advice?
1
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Daniel Devices Integration to SCADA Systems
Posted by Eudilson_Nunez_Cossio on 15 March, 2001 - 3:52 pm
I need drivers to integrate 31 Danload 6000 (Preset), 17 Old Style Danreader Unit from Daniel Ind. ...
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Le Projet LinuxPLC
Posted by Willy Smith on 15 March, 2001 - 3:48 pm
André Bacon wrote: >Je vous écrit pour savoir en quoi consiste le projet LinuxPLC car je ne suis pas sur d'avoir bien compris le projet.< On veut faire un SoftPLC*, peut-être comme Steeplechase, mais peut-être bien meilleur! Tous les programmeurs sont bienvenus à participer. ...
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PID autotune software packages: which one?
Posted by Siebe Dijkstra on 15 March, 2001 - 2:59 pm
We are looking for autotune software to tune mainly PLC (AB PLC5 & SLC) loops. Is it worth the cost or does one end-up tuning the loop manually? Who are the manufacturers? ...
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printer parallel port
Posted by manmohan singh on 15 March, 2001 - 2:28 pm
I am using parallel port of the computer to acquire the data from the analog to digital converter. I want to make it interrupt driven but I don't know how to steal the interrupt for the ports. can anybody help me.
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Usage of Flow Chart language for PLC's
Posted by Ronald Nijssen on 15 March, 2001 - 10:21 am
Mixed feelings about flow charting...
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French
Posted by Pascal Mochel on 15 March, 2001 - 2:03 am
excuse me for the french .
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A lurker speaks up...
Posted by Scott Whitlock on 15 March, 2001 - 12:17 am
I must admit that I'm not much of a lurker, because I haven't been lurking all that long. Please excuse any of my comments that seem silly/redundant/etc..
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Why not MODBUS...
Posted by Ron Gage on 14 March, 2001 - 6:52 pm
I seem to be getting quite a bit of "why not use Modbus" questions out of this discussion. I hope to fully air my concerns about Modbus and why I think it to be totally inadequate for our primary purpose...
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OPC Server for GE-Fanuc PLC
Posted by Eudilson_Nunez_Cossio on 14 March, 2001 - 5:24 pm
I need recomendations about experiences using OPC Servers for integrating information from PLC Ge-Fanuc (9030) to PI (Plant Information System) for real time data base.
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CDPD and/or cell
Posted by Bob Lockert on 14 March, 2001 - 5:20 pm
I've noticed a lack of comment on CDPD or cell phone usage. Is it being used for SCADA? ...
3
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Allen-Bradley PLC and VB Communication
Posted by Sridhar on 14 March, 2001 - 5:12 pm
Looking for Allen Bradley and PC Communication through vb programming
6
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BACnet communication protocol
Posted by Ken Irving on 14 March, 2001 - 4:37 pm
I've been wresting with a question... When the OIC (Open Indistrial Communications) Protocol discussions started up, I thought about suggesting BACnet as a possible direction, but decided against it on the basis that the specification is not freely available, and must be purchased (around $120) from ASHRAE. ...
4
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PID Equations in PLCs
Posted by BESTune on 14 March, 2001 - 4:27 pm
Hello everyone, I am collecting PID equations implemented in various PLCs.
help - looking for information on a ABB 200-cpu 30/20 ?
Posted by per grud hansen on 14 March, 2001 - 4:06 pm
Looking for manual, connection diagrams, good links, software for ABB plc 200 - 30/20 ...
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Jucker Peace PWM drive
Posted by Mark Miller on 14 March, 2001 - 3:09 pm
Looking for information about setting up/tuning...
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Need to communicate between Win95 system and microprocessor
Posted by S. Lee on 14 March, 2001 - 2:53 pm
I am doing a project for school where I need to communicate between a Win95 system (in VC++) and a PIC16F877 microprocessor. ...
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Automatic Control of Nitric Acid Concentration
Posted by T Leech on 14 March, 2001 - 2:30 pm
Automatic Control of Nitric Acid Concentration
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DH485 protocol spec
Posted by Paul Ventura on 14 March, 2001 - 1:43 pm
Looking for Allen Bradley DH485 protocol specification
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Tuning rules for PID controller
Posted by K.Vickneswaran on 14 March, 2001 - 12:06 pm
I'm currently studying for control engineering and i'm given a thesis topic to do about PID controller. It's about explaining the whole thing about Tuning rules for PID controller > I must present it using visual basic. So i need to have transfer functions and graphs.
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digital output of 24 V dc vs. 230 Vac
Posted by ECG, Freddy del Toro Leyva on 14 March, 2001 - 10:50 am
what is the advantage and disadvantage between the digital output of 24 V dc and those of 230 Vac???
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Noise on servo controller/drive
Posted by kblee on 14 March, 2001 - 12:36 am
Is anybody experienced this before?? ....
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Temperature Control
Posted by Henry on 13 March, 2001 - 7:46 pm
I'd like to know if somebody has been using a GE Fanuc IC693TCM303 modules to control temperature above 650 degrees (C).
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Performance Metrics for Industrial Ethernet Devices
Posted by Steve Cliff on 13 March, 2001 - 5:00 pm
I need to generate a list of performance metrics for industrial TCP/IP/Ethernet devices for use in the qualification and testing of devices to assist designers in the properly engineering of industrial applications. And maybe stir things up a bit as well. ...
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Another connectivity proposal
Posted by Ralph G. McDonald on 13 March, 2001 - 3:47 pm
Another communications standard we might consider for control outputs is the X10. ...
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1794-ACN15 Flex I/O ControlNet Adapter
Posted by Ing. Jairo Rodriguez on 13 March, 2001 - 3:35 pm
I`m triying to connect a FLex I/O controlnet adapter model. 1794-ACN15 with a 1756-CNB/D ControlNet Bridge. ...
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The Physics of Electrical Failures, was Power Distribution Woes
Posted by Phil Corso on 13 March, 2001 - 12:20 pm
In response to Ken Brown's scenario: There are, in my experience, two related problems. Either one alone should not occur more than once in the lifetime of an industrial plant. They are: A) unwarranted fuse operation during motor starting; and B) the ungrounded distribution system. Both result from misinformation about how each phenomenon occurs. A discussion of each follows.
parport (was: Quo vadimus)
Posted by Jiri Baum on 13 March, 2001 - 11:47 am
> > Hugh Jack wrote: > *snip* > > But the PPLC will be free - and will run on 'obsolete' PCs - the > > parallel port will provide a nice IO card. ...
LPC Updated - tarball available
Posted by Hugh Jack on 13 March, 2001 - 11:08 am
If anybody is interested I have released another updated version of the LPC (not the Puffin PLC). You can get the tarball at, http://claymore.engineer.gvsu.edu/lpcd
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Gould PC0085 from 1990 era
Posted by R. Dombek on 13 March, 2001 - 9:31 am
I am trying to locate programming software that will communicate with these PLCs. Originally the interface was through a small program terminal, but I found (through rumors) that there may be an old DOS program that exists.
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flow sensor for liquid nitrogen
Posted by msys on 13 March, 2001 - 3:10 am
I am looking for a Liquid Nitrogen flow sensor. The flow rate is 100 to 500 millilitres/min. The pressure is in the range of 1 to 2bar. Can anyone help me in finding a suitable supplier?
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What is the difference between Profibus and Profisafe ?
Posted by Thales Lima on 12 March, 2001 - 11:32 pm
I would like to know the difference between Profisafe and Profibus,and what is the main purpose of Profisafe ....
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Re: Linuxplc 8255 card
Posted by Curt Wuollet on 12 March, 2001 - 9:40 pm
Discussion of 8255 driver
Teramar monitoring and control system
Posted by clint demaray on 12 March, 2001 - 4:37 pm
looking for feedback on teramar systems
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History of SCADA
Posted by sean on 12 March, 2001 - 3:27 pm
Urgent! Writing a literature review on SCADA systems and need info. In particular information on scada when it originated to its present day and the future for SCADA. ...
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Simatic SINAUT MD125 Modem
Posted by Santiago Carvallo on 12 March, 2001 - 1:23 pm
I need to communicate with a SIEMENS PLC, the model is SIMATIC S5 100U with a 103 CPU, the modem is installed in the PLC, and the model is: SIEMENS SINAUT MD125. I'm looking for information about that modem...
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Looking for a torque transmitter
Posted by Dobrowolski, Jacek on 12 March, 2001 - 1:20 pm
I'm looking for manufacturers of torque transmitters. ...
JimPinto.com eNews - March 10, 2001
Posted by Jim Pinto on 12 March, 2001 - 12:48 pm
JimPinto.com eNews No. 36 - March 10, 2001 is on the web at : http://www.jimpinto.com/enews/mar10-2001.html
Alarms and Operator Change Log and OPC Server for RNI
Posted by Dan Robinson on 12 March, 2001 - 12:02 pm
What is syntax for pulling alarm and operator change log information from OPC server?
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step motor..?
Posted by Dominik Banaszczyk on 12 March, 2001 - 11:11 am
I am looking for drive of a chain with indexing movement. Single linear move of the chain is about 10 cm. Requested torque 300Nm. I'm going to use step motor, but I am not sure if that kind of motor (400 W) is available ? ...
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Access a SNMP device via OPC ?
Posted by Peter Windmann on 12 March, 2001 - 5:13 am
Does anybody know about the possibility to access data from a SNMP-Device (i.e. a Ethernet Hub or Switch) via OPC ...
34
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First attempt at an open communications standard
Posted by Ron Gage on 11 March, 2001 - 10:08 pm
Here it is, version 0.0.1 of what I am calling OIC - Open Industrial Communications. It is a written spec, not code. ...
3
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Serial communication under NT
Posted by Jan on 11 March, 2001 - 7:33 am
Serial communication problem under NT
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Market Dominance / Country
Posted by Mark on 11 March, 2001 - 6:16 am
Most questions refer either to AB/Siemens, I'm just curious as to who the main 'players' are worldwide.
3
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Quo vadimus
Posted by Jiri Baum on 9 March, 2001 - 4:06 pm
In what way do we mean to compete with PLCs? I'm not sure we're all that clear ...
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GE FANUC PLCs + third party switch gear
Posted by IP OMER BIN ABDUL AZIZ on 9 March, 2001 - 3:51 pm
I want to deploy a network based on GE FANUC PLCs, Genius I/Os and Siemens intelliegent switch gear (Profibus DP enabled). Does anyone have any experience of using third party products with GE in a similar configuration? ...
4
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Adding external DC offset to analog output
Posted by Stephen Bennett on 9 March, 2001 - 1:50 pm
I have a -10Vdc to 10Vdc analog output from a robot controller card. The D/A signal from the robot is eight bits, -10 being zero and +10V being this highest count of 255(2^n -1). During normal operation this signal is held at -10 V dc. I would like to know how I can easily give this signal an external DC offset so that the output range of the card could be bumped up to 0 to 10V ....
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Mitsubishi FX2N Analog Output - huh??
Posted by Jody Gallant CET on 9 March, 2001 - 12:25 pm
Complex Mitsu. Analog IO
21
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Parallel port driver - whois?
Posted by Hugh Jack on 9 March, 2001 - 4:27 am
Who is going to take the lead on this?
2
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puffinplc
Posted by Jiri Baum on 9 March, 2001 - 3:38 am
I've put the beginnings of a puffinplc utility into the CVS. ...
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Altivar 45 2 Variable Speed Drive
Posted by Tichaona on 9 March, 2001 - 3:30 am
Problem with pre-programmed reference frequencies. Desperate for help.
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connectivity (OPC)
Posted by Juan Carlos Orozco on 8 March, 2001 - 2:15 pm
Is there any OPC effort in GPL for Linux, because in my opinion this is a great way of taking this project to the factory floor. I am not saying that it is the only way, just that it is a good way. ...
23
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100V Vs 240V
Posted by Ayis Iacovides on 8 March, 2001 - 1:29 pm
Why does europe support a 240 V system and U.S. a 110 V one? Are there advantages one one over the other? Is it a safety thing ...
3
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RSLogix on Linux???
Posted by Joe Jansen/ENGR/HQ/KEMET/US on 8 March, 2001 - 11:11 am
Has anyone tried to run RSLogix 500 on Linux using WINE? How about RSLinx Lite? I just want to know if anyone had any experience trying this before I take the plunge ...
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Long distances on Foundation Fieldbus and Profibus PA
Posted by Toni Kaesbeck on 8 March, 2001 - 10:53 am
Does anybody have experiences on Foundation Fieldbus and Profibus PA with "real long distances" over a couple of miles/kilometers? What are the requirements on existing cabling?
8
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PT100's on a bus system - but which bus?
Posted by Mark on 8 March, 2001 - 8:30 am
I want to connect say 30 PT100 probes on a simple bus system. Data to be used by a remote PLC?
4
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AB 8200 controller
Posted by Marvin on 7 March, 2001 - 9:07 pm
We require the service manuals for an Allen Bradley 8200 CNC
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Program management / Rev control Software
Posted by Juan Muniz on 7 March, 2001 - 8:41 pm
Looking for Program that will help with program management and version control.
3
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Medoc to MM+
Posted by Jontte on 7 March, 2001 - 2:21 pm
How to convert old Medoc program to new MM+
3
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Simatic TI 435 CPU
Posted by Kiel-1, Larry on 7 March, 2001 - 11:14 am
I was wondering if anyone knows of a company that makes or repairs modules for the TI 435 series. ...
1
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technical assist wanted on adam module
Posted by fendie on 7 March, 2001 - 11:12 am
i'm student from UiTM shah alam has conducted a engine test bed using the pc interface. the module that i was used is adam 4018m and adam 4520 from advantech. my problem is i want to enable multiple channel on adam 4018m with different address and different input such as t/c and mV input. ...
7
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SCADA & QNX
Posted by Andrew Mustonen on 7 March, 2001 - 10:20 am
Is there any SCADA available which works on QNX operating system?
2
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Setting up multiple hydraulic pressure settings
Posted by Mike Piotrowski on 7 March, 2001 - 10:01 am
Can you set up a 4 position selector switch/panel to a single acting hydraulic pump and cylinder?
4
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S5-155H With CP1430 link to Teleperm-XP
Posted by Siah on 7 March, 2001 - 7:56 am
How can I send data block to teleperm-xp via CP1430. (siemens sinec H1 bus)
2
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Evaporation loss
Posted by Kadhirvelan on 7 March, 2001 - 3:58 am
Evaporation loss calculation in above ground storage tanks.
Library for Power Management System
Posted by Sj. Loonstra on 6 March, 2001 - 1:27 pm
We have to make a Power management system using Siemens S&-400 H systeem. Now I'am looking for software modules which I can use in Step 7. ...
37
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Level Measurement in Jugs
Posted by Kirk S. Hegwood on 6 March, 2001 - 1:13 pm
I'm working on a small machine which will require the level measurement of liquids. All I need is an input as to appropriate level and/or if the container holding the liquid is empty (prefer level). The input will be 12VDC and tied back to a PLC. ...
5
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Single Axis Motion Control Project
Posted by John Jackson on 6 March, 2001 - 12:22 pm
I would like to explore the PuffinPLC philosophy on a single axis motion control project that I am working on. ...
9
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regarding sample projects on RTOS & EMBEDDED SYSTEMS
Posted by VAIDEESWARAN VENKATESWARAN on 6 March, 2001 - 11:54 am
iam a electronics engineer by disciplne and presently i am there in the dcs instrumentation field and i want to switch over my line to embedded software line. ...
3
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DP Versus FDL
Posted by Filipe Campos on 6 March, 2001 - 11:43 am
What is the principal difference between profibus FDL and S7 ? In what cases shall use S7 instead of FDL? If I have a PLC with a lot's of data to report to a Command Center, which is the best protocol? ...
4
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Two PCs sharing data, was PC to PC communication through modem
Posted by RRI on 6 March, 2001 - 10:17 am
There are two Pentium III (800MHZ) PCs around 200mts apart. Both the PCs have same database. When data is entered in any of these PCs, it should be stored in both the PCs at the same. How can I get it done.
3
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Solid State Relays
Posted by Mike Weickert on 6 March, 2001 - 9:59 am
I am looking for a solid state relay to convert a 24VDC sourcing (PNP) output to a 24VDC Sinking (NPN) output.
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Multiplexers in Analog I/O Modules
Posted by Lito Torres on 6 March, 2001 - 9:20 am
Analog I/O Modules
6
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YASKAWA PLCs
Posted by Mark on 6 March, 2001 - 7:45 am
I need a software package that enables direct comms.
5
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PLCs & Distances
Posted by Ion Voinea on 6 March, 2001 - 4:06 am
Can I have more I/O modules on a bus of aproximately 4 km? Please help
2
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connectivity
Posted by Jeff on 5 March, 2001 - 9:59 pm
I am eager to see what can be done with this. I do integration work in the PLC realm and have been waiting to finally find something like this. Is this ready for plantfloor testing, or when will it be? I see that there is discussion as to using lp connections. ...
GEFanuc Temperature Control Module
Posted by Kike2511 on 5 March, 2001 - 7:34 pm
The temp readings goes down at 600 C in these modules.
acoustic receivers
Posted by Greg on 5 March, 2001 - 6:36 pm
Need information about receiving and acting on acoustic waves of specific freqeuncy.
3
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rs232 to rs485 adapter
Posted by Juanjo on 5 March, 2001 - 4:00 pm
I need a rs232 to rs485 adapter schematic, please, help me
3
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Wet leg for Dp Transmitter
Posted by phil dryburgh on 5 March, 2001 - 3:56 pm
About 12 months ago I seen a thread about keeping the wet leg for a Dp transmitter open from blockages. The application is for sump levels in a coal preparation plant. ...
22
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Power Distribution Woes
Posted by gerald beaudoin on 5 March, 2001 - 12:30 pm
A couple of weeks ago we had a fuse blow in a mainswitch which was supplying a 3 phase 575volt distribution trough. ...
35
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Schneider Files Patent Infringement Suit Against Opto 22
Posted by Jeff Dean on 5 March, 2001 - 12:26 pm
I've taken this from the ARC Automation News headline website.... Given the recent discussion on the sale of intellectual property, patents, and enforceability, this should be an interesting one to watch. ...
3
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switch for analog signals
Posted by Bruce on 5 March, 2001 - 12:26 pm
I am looking for a good low cost way to select one 4-20mA signal from three to send to a electronic controller. I have a heat cool loop taking care of three jacketed vessels, each with their own RTD transmitters. Is a simple switch OK? Is there concern with surges damaging equipment? Is there a DIN type commercial product available?
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SECS/GEM Protocol Usage with Standard PLC or HMI
Posted by Nijssen, Ronald on 5 March, 2001 - 12:23 pm
Is there anybody that can explain me if he has implemented a SECS/GEM Interface into a Standard "off-the-shelf" PLC or HMI Product. ...
JimPinto.com eNews 2 March 2001
Posted by Jim Pinto on 5 March, 2001 - 12:20 pm
The latest JimPinto.com eNews dated 2 March 2001 is on the web at : http://www.jimpinto.com/enews/mar02-2001.html
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ultrasonic measure for grain bin
Posted by Ben Dyck on 5 March, 2001 - 12:03 am
I'm looking for a device to hang from the top of a grain bin to tell me how full the bin is .
Header files in Unix Operating System
Posted by Deepa K on 3 March, 2001 - 1:51 pm
Anybody has an idea about the source of the header files in Unix Operating system for the ADC and DAC?