Ramp Rates
The Ramp Rate for a dimmer is how fast it will turn on or off. These
values can be useful when linking devices. When reading this table, the
value in the Ramp Rate column corresponds to on/off time given in the
Time column. For example, if the Ramp Rate is 0x0F (15), the device
will take 38.5 seconds to turn on/off.
| Time |
Ramp
Rate |
Half
Rate |
100% ON at Rate |
|
|
|
|
|
|
| 9 min* |
0x00 |
0 |
|
|
|
|
|
|
|
|
|
| 8 min |
0x01 |
1 |
0x00 |
0 |
240 |
|
|
|
|
|
|
| 7 min |
0x02 |
2 |
|
|
|
|
|
|
|
|
|
| 6 min |
0x03 |
3 |
0x01 |
1 |
241 |
|
|
|
|
|
|
| 5 min |
0x04 |
4 |
|
|
|
|
|
|
|
|
|
| 4.5 min |
0x05 |
5 |
0x02 |
2 |
242 |
|
|
|
|
|
|
| 4 min |
0x06 |
6 |
|
|
|
|
|
|
|
|
|
| 3.5 min |
0x07 |
7 |
0x03 |
3 |
243 |
|
|
|
|
|
|
| 3 min |
0x08 |
8 |
|
|
|
|
|
|
|
|
|
| 2.5 min |
0x09 |
9 |
0x04 |
4 |
244 |
|
|
|
|
|
|
| 2 min |
0x0A |
10 |
|
|
|
|
|
|
|
|
|
| 1.5 min |
0x0B |
11 |
0x05 |
5 |
245 |
|
|
|
|
|
|
| 1 min |
0x0C |
12 |
|
|
|
|
|
|
|
|
|
| 47 sec |
0x0D |
13 |
0x06 |
6 |
246 |
|
|
|
|
|
|
| 43 sec |
0x0E |
14 |
|
|
|
|
|
|
|
|
|
| 38.5 sec |
0x0F |
15 |
0x07 |
7 |
247 |
|
|
|
|
|
|
| 34 sec |
0x10 |
16 |
|
|
|
|
|
|
|
|
|
| 32 sec |
0x11 |
17 |
0x08 |
8 |
248 |
|
|
|
|
|
|
| 30 sec |
0x12 |
18 |
|
|
|
|
|
|
|
|
|
| 28 sec |
0x13 |
19 |
0x09 |
9 |
249 |
|
|
|
|
|
|
| 26 sec |
0x14 |
20 |
|
|
|
|
|
|
|
|
|
| 23.5 sec |
0x15 |
21 |
0x0A |
10 |
250 |
|
|
|
|
|
|
| 21.5 sec |
0x16 |
22 |
|
|
|
|
|
|
|
|
|
| 19 sec |
0x17 |
23 |
0x0B |
11 |
251 |
|
|
|
|
|
|
| 8.5 sec |
0x18 |
24 |
|
|
|
|
|
|
|
|
|
| 6.5 sec |
0x19 |
25 |
0x0C |
12 |
252 |
|
|
|
|
|
|
| 4.5 sec |
0x1A |
26 |
|
|
|
|
|
|
|
|
|
| 2.0 sec |
0x1B |
27 |
0x0D |
13 |
253 |
|
|
|
|
|
|
| 0.5 sec |
0x1C |
28 |
|
|
|
|
|
|
|
|
|
| 0.3 sec |
0x1D |
29 |
0x0E |
14 |
254 |
|
|
|
|
|
|
| 0.2 sec |
0x1E |
30 |
|
|
|
|
|
|
|
|
|
| 0.1 sec |
0x1F |
31 |
0x0F |
15 |
255 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
* SwitchLinc Dimmers V4.35 and up
treat a ramp rate setting of 0x00 as a 2 second ramp rate. All other
ramp rate settings operate as listed on the table. This was changed by
Smarthome to work around a default setting in the ISY.
Newer devices (e.g. LampLinc V4.1 and up) also have two commands called "Light ON at Ramp Rate"
and
"Light OFF at Ramp Rate".
Rather than using the preset ramp rate for
the device, these commands specify both a level and ramp rate in
command2. Since both kinds of information will be transmitted in a
single byte, each must be compressed to a 4-bit value. The Half Rate in
the table above gives the value for the Rate part. The Level will be
sent in the high bits. For example:
11111101 = full on (1111 =
240) in 2 seconds (1101 = 0x0D = 13).
00000101 = full off (0000 = 0) in 1.5 minutes (0101 = 0x05 = 5).
10001101 = 56% on (1000 = 143) in 2 seconds (1101 = 0x0D = 13).
The
level is simply the high bits that would normally be set, plus 0x0F
(1111). For example in the last example above, the high bits are 1000
so the actual level the light will go to is 10001111 = 143. This means
that the Light ON at
Ramp Rate command can never set a light to a level lower
than 00001111 = 15 (about 6% on).
To
turn the light off, just use the value in the Half Rate column by
itself with the Light
OFF at Ramp Rate command.
To turn the light on to
100%, use the value in the 100%
ON at Rate column, which has 1111 for
the level bits.
Light ON at Ramp Rate
is command 0x2E (46).
Light OFF at Ramp Rate
is command 0x2F (47).