Crestron
C2N-CAMIDJ
Digital Joystick Camera Controller
Operations Guide – DOC. 6341
Digital Joystick Camera Controller: C2N-CAMIDJ
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17
Signal
Types
Signals interconnect the various devices and logic symbols that comprise a SIMPL
program. Signals can be one of three types: digital, analog, or serial. For any given
signal, the signal type is determined by its driving source. That is, if the symbol that
drives the signal has an analog output, then, by definition, the signal connected there
will be an analog signal.
In SIMPL Windows, the signal types are color-coded as follows:
Digital = Blue
Analog = Red
Serial = Black
Other = Green
NOTE:
“Other” signals are a combination of the three basic types (e.g. many symbols
accept either analog or serial signals where the combination is shown as a green signal).
The signal type is displayed on the Status Bar when the signal is highlighted.
For additional information, refer to Doc. 6120, Crestron SIMPL Windows Symbol
Guide. It may be downloaded from the Crestron website.
Digital Signals
A digital signal contains one bit of information and usually takes on one of two
values: 1 or 0. These two digits can represent the logical values true and false, and
they can be represented in an electronic device by the states on/off or high/low,
recognized as two voltage levels. (Other common descriptors are active/inactive.)
Analog Signals
Unlike digital signals, analog signals can vary continuously in value, in the same
manner as a parameter such as volume, temperature, or pressure. Analog signals
contain 16 bits of information, which means that this type of signal can have values
ranging from 0 to 65535 (2
16
-1). This 16-bit property makes analog signals useful for
controlling devices that do not have discrete settings, such as volume controllers,
pan/tilt head controllers, and lighting dimmers.
Serial Signals
Serial signals are much like analog signals, in that they, too, contain 16 bits of
information. However, whereas the value of an analog signal is used directly–to
control volume or temperature, for instance–the value of the serial signal is used as a
pointer to a location in memory that contains a string of characters. When a serial
signal is routed to a symbol, that symbol can identify the signal as serial rather than
analog and it will automatically look at the data to which it points.
Thus, serial signals are used to facilitate the transmission of serial data (strings of
characters). These signals can be generated by incoming data on a COM port or by a
symbol that has a serial output.
Input/Output Signals
The following table lists functional descriptions for the CAMIDJ inputs and outputs.
Many of the signal descriptions include information relative to the CamiDJ Interface
Module included in the CAMIDJ example program. Refer to the Appendix for a
functional description of the CamiDJ Interface Module.