I believe Brian hit the nail on the head - you have increased signal loading between your CM11a and your problem devices. Your hand held remote works because your transceiver (RR501, TM751) has a higher output level (although the CM11a is no slouch) or better path to this circuit. To test this, you could try plugging your CM11a into the transceiver location.
As far as the units not responding to an ON command - is it possible that you have more active devices on the line at dusk (on command) than are present at 11 pm (off command).
It is also possible that your X10 command is being "morphed" by the time it reaches your LM465's. At one time I had an installation with a RR501 transceiver on one phase and my son's bedroom switch (address A6) on another. I had a motion sensor set to trigger the hall lights on (address A8) delay for a minute and then turn them off. When the A8 off command was sent it would wrap through my active phase coupler and "morph" into a A6 off command (turned my sons bedroom lamp off). This occurred virtually every time the A8 off command was sent over a period of days. I installed a Smarthome Boosterlinc to rectify the problem.
Before adding hardware to "fix" your system try the following:
- Try shutting off breakers to determine where signal absorbers or noise generators are located - these can be filtered
- Try to determine what devices you have on the same branch as your LM465's - unplug any suspects (stereo, computer, TV) to troubleshoot
- Determine whether your CM11a is on the same phase as your problem units - try moving the CM11a around to see if you can correct the problem.
Depending on the size of your installation, your options include:
- Problem unit filtering
- Active coupler
- Repeater
The correct answer will depend on your home size, number of installed loads (tv's, computers, other), and whether you plan on expanding your X10 system in the future.
I installed the boosterlinc to correct the loading problem on one of my lines - loading was due to a number of X10 2-way devices that couldn't be filtered. Knowing what I do today, I would probably have opted for JeffVolp's XTB-II instead.
Almost forgot - any compact fluorescents installed recently?
Thanks for the extensive reply. I really appreciate it. But all of these still have not helped.
Some clarifying points:
The "on" signal that is lost is not just at one time. Let me explain a little deeper:
- the signals being lost are transmitted to several LM465's via two physical copper lines. I have two separate 20 amp circuit breakers in the main panel next to one another which each of these are therefore running on separate phases of the power but run to a an outdoor underground watertight box and lets call them circuits A and circuit B.
- on circuit A there are three distinctly different LM465's with separate device codes:
- code 14 for a pond pump which has an "on" code sent at 6 am and an off code sent at 6 pm. The "on"
code is not received, but the "off" code is.
- code 15 for a flag pole light which has an "on" code sent at dusk and an "off code sent at 11 pm. The "on"
code is not received, but the "off" code is.
- code 04 for some other lights that have no regular schedule signals sent.
- on circuit B there is one LM465:
- code 7 for driveway low voltage lights which are sent an "on" code at dusk and an "off" code at 11 pm.
There are 5 other LM465's around the house that have this same code and function fine, only this one
particular LM465 does not receive the "on" code does receive the "off" code.
This is what I don't understand, How can all of these be loosing the "on" code being sent at differing times of the day, but receive "off" codes which overlap with about the same time as "on" codes that are being lost and on differing circuits?
I have:
1. swapped the two circuits breakers.
2. moved the CM11A to an outlet just adjacent to the RR501.
3. reloaded the CM11A several times.
I would point at the CM11A as going bad but the signal 07 is received by several other LM465's around the house and some at a much farther physical distance than the one that it is being lost on.
Could that particular copper cable have an issue that is causing the signals to MORPH?
If that is the issue, not sure how to fix it.
Bruce