Why is it that when I use 2 IR-543's, One of them
doesn't respond? Also when I enter a number that I learned from my X-10 PUR08 greater than 09, such as 11,or 12, it controls my number 1 switch. How can I use more than one IR-543 with all 16 functions on each?

There is no way of controlling two IR-543 with all 16 devices on each. Since the Pronto is only set to a single house code only one of the IR-543's will respond. Try using one of the X-10 codes here: [Link: 63.217.229.8]
instead of learning them from your remote, it might work better..

Not an expert here, but on my IR-543, the house code is set by default on the IR-543 itself (the little letter wheel on the top). The IR-543 adds the house code on the front-end of any IR command it receives to build the full X-10 command. So, technically speaking, the Pronto is not sending the house code.

You could control two IR-543's from the Pronto, so long as whatever X-10 command you wanted sent to the IR-543 you wanted to apply to both house codes.

I'm not aware of an IR to X-10 device that will support multiple house codes - but you should check Smarthome.com. If there is an IR codeset for the house code, there is no reason the Pronto won't send it.

dave i ahve the answer which i use now in my system. the others are right the ir543 will not detect hose codes so what i have done is I put each ir543 on a seperate appliance module, when i want to use one box i send an ir code to turn one box off and the other on , and vice versa , therefore i can have as many boxes as i need and only have one powered because the appliance module will turn it off , it is actually quitew simple if you are inteestd in this write back on the thread and i will explain in exact detail to help you out with it

How exactly are you accomplishing that? Having a single IR543 control a bank of other IR543s is impossible since you would need the master IR543 active to select which secondary IR543 to use. However that would mean there would always be two IR543s active at a single time, and thus they'd both respond to the same IR codes (causing signal collisions). Now you could control a bank of IR543s via RF, but that wouldn't work with the Pronto.

craig i would like to know exactly how you do this

It could be that if he had, for example, 3 extra IR543s, that he does not put anything on unit codes 1-3 for any of the IR543s except for the master IR543. Then he would only have 14 devices per each of the 3 IR543s, one per housecode, for a total of 52 devices. That would work, but there was that law of diminishing return by doing this.

I am curious on how 2 IR543s, both on different housecodes, are able to send signals along the house wiring such that nothing gets mixed up along the way?

But there's still the problem where the master IR543 would duplicate anything transmitted by the slave IR543s -- just on a different housecode. That'll generate a "signal collision" which basically means that nothing will happen.

Craig : Please explain how you accomplished this as i agree with everyone else's reasoning in that it doesnt seem possible.... but, if you have figured it out then i would definitely like to know how as i would like to do the same in my house.

thinking some more about this.... if you set up the 2 IR543's ... one as housecode A and other as B... plug the A device into an appliance module set to B1 and the B device into an appliance module set to A16.

NOW... (thinking on the fly here) When you want to send an ON command to a unit in the house set to A5 for example you could use a macro consisting of the following string of commands...

B1-ON , A16-OFF , A5-ON

In theory.. and strictly in theory.. this would turn the appliance module A16 off which would not allow the command B5-ON to be sent from the 'B' IR543, this would turn the appliance module B1 on which would allow the command A5 to be sent into the house wiring system. This would allow X10 devices set to A5 and B5 to be used in the same house without conflicting signals as the appliance modules act as filters as long as macros are used to turn the appropriate appliance modules on or off depending on the house code of the unit from which the response is needed.

limitations are that NO devices could be set to 1 or to 16 for a unitcode, these are limited to the two appliance modules which are controlling the IR543's. Either IR543 could turn either off or on as whichever one is currently on will either stay on or it will issue an on command and then turn itself off...

PHEW.... I dont know, what do you think.....it hurts my brain to think about it.

I thought of that as well -- but there's a problem. The command to turn the unneeded IR543 off would be transmitted by both IR543s (since you just turned the other on). I'm not sure that would work properly. Then there's also the problem if a command isn't sensed properly you could end up with both IR543s in an 'off' state.

guess I, I mean, someone needs to try it...

There is another answer to this problem. Albeit a little more expensive and a little more complicated but it provides MUCH more capability.

Start by throwing away those IR543s and buy an Ocelot from Applied Digital (www.appdig.com). The Oce is a full blown IR/X-10 home automation controller. You can get the software off the www site and play with it.

To this specific problem you can use MAKEHEX or GENIRDB to make as many unique codes for the Pronto you like. Then teach these codes to the Oce and it will send out the X-10 commands. With this combination the possibilities are limitless. e.g. you can do scenes with inexpensive Leviton wall switches using the preset dim commands.

Ocelot available for $120 plus $16 for TW523 X-10 interface.

Have a ball...

I use Homeseer by www.keware.com running on an old Compaq LTE laptop 24/7 with one IR543 and a CM11 PC interface.
I can use dim, bright, on and off to activate appliances/lights thus enabling me to control 64 devices very cheaply.