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Home > Archive > Home Automation > July 2007 > what exactly a dim command for x10 lamp module?
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what exactly a dim command for x10 lamp module?
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| HI all
I have powerlinc v2 controller [USB] with LM465 lamp module connected
to a powerline. I am making use of Smarthome device manager
[SDM3.exe]. I have to change the dim level of lamp module.From its
behaviour [of LM465] it goes first to full bright and then goes to DIM
level.
Using sendX10 and for x10 address let say=A2 what dim command should i
use
1. sendX10=A2, DIM 30%
2. sendX10=A2,DIM 30
or any other command
Thanks
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| Charles Sullivan 2007-07-03, 1:25 pm |
| On Tue, 03 Jul 2007 05:32:54 -0700, arnie wrote:
> HI all
> I have powerlinc v2 controller [USB] with LM465 lamp module connected
> to a powerline. I am making use of Smarthome device manager
> [SDM3.exe]. I have to change the dim level of lamp module.From its
> behaviour [of LM465] it goes first to full bright and then goes to DIM
> level.
> Using sendX10 and for x10 address let say=A2 what dim command should i
> use
>
> 1. sendX10=A2, DIM 30%
> 2. sendX10=A2,DIM 30
> or any other command
> Thanks
If the LM465 is Off, then any Dim command will first turn it fully
On, then proceed to Dim it from that point. This is a firmware
feature of the LM465 and cannot be changed. Was that your
question?
If the LM465 is On but fully dimmed (to darkness), then it can be
brightened with the appropriate Bright command. Or if partially
dimmed it can be further dimmed or brightened from that point.
I don't know what algorithm your SDM3 uses to convert the
programmed level (e.g., 30) to the (nominal) 210 brightness steps
available in the LM465 - you may have to experiment.
BTW, alt.home.automation doesn't get a lot of traffic - you'll be
better off posting to comp.home.automation.
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| Yes in order to dim one has to first make device to full on level.
but subsequently if one want to dim the device can i specify the
absolute value as i have mentioned earlier. I have also seen certain
number of levels supported by the dimming devices what does that mean?
Thanks
Arnie
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| Charles Sullivan 2007-07-04, 9:25 am |
| On Wed, 04 Jul 2007 01:47:45 -0700, arnie wrote:
> Yes in order to dim one has to first make device to full on level.
> but subsequently if one want to dim the device can i specify the
> absolute value as i have mentioned earlier. I have also seen certain
> number of levels supported by the dimming devices what does that mean?
> Thanks
> Arnie
I can't give you exact answers as it depends both on your PowerLinc
hardware and on the software driver.
Some software will let you specify an "absolute" dim level. It will
then first send sufficient Bright signals to bring the lamp module
to full brightness, then Dim to the specified level.
Other software will only have "relative" dimming, and it will be
up to the user to first brighten the module to full brightness
before dimming.
Most hardware controllers will support adjusting the dim level in
5% or 6% steps. (Some controllers support 1% or 3% steps.) From
what I've seen of Smarthome devices, I suspect your PowerLinc will
only support the 5% or 6% steps. (You may be able to program the
software in 1% increments but the actual dim signals sent are
rounded to the nearest 5% or 6% level.)
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