James, Thanks for the info. I will keep reference to it for further study and it may come in useful for future projects. We are working on a mobile information network that may be able to take advantage of a technology such as you mentioned. As for the project at hand, we do not intend changing our hardware for this application. We currently implement both PIC16F876 and PIC18F6720. The programming will not be required over internet, users simply plug the wireless controller device into the PC via serial port or USB and upload new code as they make their own changes. Kind Regards David Huisman (CEO) ----------------------------------------------------------------------- ORBIT COMMUNICATIONS - Wireless Solutions that Work (Telemetry, Control, Monitoring, Security, HVAC ...) Website : http://www.orbitcoms.com PO Box 4474 Lakehaven NSW 2259, AUSTRALIA Phone: 61-2-4393-3627 Fax : 61-2-4393-3685 Mobile: 61-413-715-986 ----- Original Message ----- From: "James Caska" To: Sent: Tuesday, January 28, 2003 11:08 PM Subject: Re: PLC help > Hi David, > > > So we can plug this Java based application into our VB.Net code ? > > Embedlets is still in its infancy, but yes, Embedlets are about plugging > networked embedded applications back into VB.Net and J2EE backends in a > seamless and object orientated fashion. Embedlets is at this stage an Open > Source Experts group forging a specification which we hope to build a > standard and reference implementation upon. That standard then creates > opportunities for commericial adopters like ORBIT COMMUNICATIONS , which is > a wireless connectivity company is bang on the 'wide-fan' vision of the > Embedlets target application. > > > Then we can extract text from the objects to form a Logic > > statements that we > > can integrate into our C based application in the PIC ? > > The embedlets concept is a little more ambitious than this. Using the PLC > analogy which is where this began, PLC logic can be considered as a subset > of the Embedlets specification. In this type of application, the components > of the PLC ie Counters and Relays and Comparitors etc, are all Embedlet's > and the Ladder logic is like the Embedlet connectivity schema and the > Embedlet container is where all these Embedlets execute which is a bit like > the PLC Looping Runtime. > > It's alot to take in at once, but basically the idea is to instead of > extract strings and implement some sort of interpreter in C' you serialise > the object tree representing the PLC Embedlet application and upload it over > the internet into the Java Enabled Device implementing the Embedlet > Container which as a minimal platform will be the muvium uVM-877A which is a > PIC16F877A Java Enabled device. > > > Regards, > James Caska > http://www.muvium.com > 'Java Bred for Embedded' > > > > > > > -----Original Message----- > > From: pic microcontroller discussion list > > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Orbit Communications > > Sent: Tuesday, January 28, 2003 6:26 PM > > To: PICLIST@MITVMA.MIT.EDU > > Subject: Re: PLC help > > > > > > James, > > > > So we can plug this Java based application into our VB.Net code ? > > > > Then we can extract text from the objects to form a Logic > > statements that we > > can integrate into our C based application in the PIC ? > > > > Kind Regards > > > > David Huisman (CEO) > > ----------------------------------------------------------------------- > > ORBIT COMMUNICATIONS - Wireless Solutions that Work > > (Telemetry, Control, Monitoring, Security, HVAC ...) > > > > Website : http://www.orbitcoms.com > > PO Box 4474 Lakehaven > > NSW 2259, AUSTRALIA > > Phone: 61-2-4393-3627 > > Fax : 61-2-4393-3685 > > Mobile: 61-413-715-986 > > ----- Original Message ----- > > From: "James Caska" > > To: > > Sent: Tuesday, January 28, 2003 11:05 AM > > Subject: Re: PLC help > > > > > > > Again the embedlets specification is ALL about this, ie how to plug > > wide-fan > > > java enabled devices into backend J2EE databases. > > > > > > Example wide-fan scenario we are working on > > > > > > http://crusher.ssu.portsmouth.oh.us/~tkosan/java/embeddedjavascenario/ > > > > > > Again I encourage you join the email list just to listen in on the > > emerging > > > spec if you have not already done so ;-) > > > > > > http://sourceforge.net/projects/embedlets/ > > > > > > Regards, > > > James Caska > > > www.muvium.com > > > 'Java Bred for Embedded' > > > > > > > > > > -----Original Message----- > > > > From: pic microcontroller discussion list > > > > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Orbit Communications > > > > Sent: Tuesday, January 28, 2003 7:03 AM > > > > To: PICLIST@MITVMA.MIT.EDU > > > > Subject: Re: PLC help > > > > > > > > > > > > I appreciate your comments but we are not wanting to develop a PLC. We > > are > > > > developing a specific product that will enhance our Wireless > > connectivity > > > > products. It will incorporate many functions not available in a PLC. > > > > > > > > We are interested in the mechanics of how PLC logic is > > presented to the > > > > controller in a typical PLC but have no intention of reinventing > > > > an existing > > > > product. > > > > > > > > Kind Regards > > > > > > > > David Huisman (CEO) > > > > > > ----------------------------------------------------------------------- > > > > ORBIT COMMUNICATIONS - Wireless Solutions that Work > > > > (Telemetry, Control, Monitoring, Security, HVAC ...) > > > > > > > > Website : http://www.orbitcoms.com > > > > PO Box 4474 Lakehaven > > > > NSW 2259, AUSTRALIA > > > > Phone: 61-2-4393-3627 > > > > Fax : 61-2-4393-3685 > > > > Mobile: 61-413-715-986 > > > > ----- Original Message ----- > > > > From: "Micro Eng" > > > > To: > > > > Sent: Tuesday, January 28, 2003 1:07 AM > > > > Subject: Re: PLC help > > > > > > > > > > > > > First off...I've been doing PLC and ladder logic stuff for > > > > about 20 years. > > > > > Unless you have a buring desire to do this for fun, the > > product for a > > > > small > > > > > market might not be worth it, when you can buy all the pieces > > > > for what it > > > > > might cost to develop your own. For a specific use > > controller, which > > is > > > > > what PIC's are great for, then it makes sense to build a board, etc > > but > > > > > write the code in C or assembly since it is for target use. > > > > > > > > > > Now, for PLC applications, the only reason to write ladder logic is > > > > legacy. > > > > > In other words, thats the way its always been done, and the control > > > > > engineers understand it (maybe some don't relize its a throwback to > > real > > > > > ladder logic of using relays and timers) so why mess with it? > > > > To get back > > > > > to the subject at hand, there is a company called Direct Automation > > that > > > > > sells the stuff pretty darn cheap, because its thier brand, > > albiet it > > it > > > > > probably a japanese remark, but you aren't paying the price for > > > > a Siemens > > > > or > > > > > AB unit. Of course, some outfits demand an AB unit, because of the > > name > > > > > associated with it. I've developed using AB software, Rockwell, GE, > > > > > Siemens, TI and a few other off brand things, and they are all about > > the > > > > > same. > > > > > > > > > > Just my .02 worth > > > > > > > > > > > > > > > > > > > > _________________________________________________________________ > > > > > Add photos to your messages with MSN 8. Get 2 months FREE*. > > > > > http://join.msn.com/?page=features/featuredemail > > > > > > > > > > -- > > > > > http://www.piclist.com hint: PICList Posts must start with > > ONE topic: > > > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other > > [BUY]:,[AD]: ->Ads > > > > > > > > > > > > > > > > > > -- > > > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > > > > > > > > > > > -- > > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > > > > -- > > http://www.piclist.com hint: The list server can filter out subtopics > > (like ads or off topics) for you. See http://www.piclist.com/#topics > > > > > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics