Specifications

Software Crestron SIMPL Windows
used in conjunction with other symbols that require analog signals as inputs (e.g.
Analog Sum). In this case you can simply place a "1" on the digital input, and thus
on startup all output signals will be set to the values specified by the corresponding
parameters.
Analog Preset Symbol
The Analog Preset symbol allows you to force an analog signal to a specific value,
and to have it assume that value by smoothly ramping from its current value to the
new value over the time specified by the ‘time’ parameter. Note that the actual speed
that the analog signal changes is based upon this parameter and the total distance it
must travel.
This symbol has a single digital input, but an arbitrary number of analog outputs,
each output having a corresponding destination value. On the rising edge of ‘input’,
the output signals will start ramping to their destination values. This one-input,
multiple-output property makes each Preset symbol useful for creating a ‘scene,’
where the analog outputs could represent lighting zones, volume levels, etc.
The Analog Preset symbol is very similar in operation to the "Single-Input Form" of
the Analog Initialize symbol, described above. While the Analog Initialize symbol
can be used for any application where analog signals are needed, such as volume and
lighting control, it is not always the most appropriate option.
The problem with using the Analog Initialize symbol in certain cases is that when the
symbol is triggered by a rising- edge, the analog signals on the outputs immediately
change to the values specified by their parameters. In situations where you want a
smooth transition instead of a jump, use the Analog Preset symbol.
The only difference between the Analog Preset symbol and the Single-Input Form of
the Analog Initialize symbol is the addition of the "ramp_time" parameter. This
parameter specifies how long it takes from the moment the digital input goes high to
the moment that the analog outputs achieve their desired values. During that time the
analog outputs will fade linearly.
The following example shows how you can use the Analog Preset symbol to create
lighting scenes.
60 • Crestron SIMPL Windows Primer – DOC. 6253