Specifications

Software Crestron SIMPL Windows
OR Symbol Example
AND Symbol
The AND symbol will drive its output signal high whenever all of its inputs are high.
Looking at the figure below, you could say that 'signal_out' is high whenever
'signal_1_in' AND 'signal_2_in' are high.
AND Symbol
Alternatively, we can describe the behavior of the AND symbol using the truth table
shown below.
Signal_In 1 Signal_In 2 Signal_Out
Low Low Low
High Low Low
Low High Low
High High
High
NOTE: Similar to the OR symbol, the AND symbol can have arbitrary number of
inputs, but always a single output.
AND Symbol Example: discrete power on/off
Because the output to an AND symbol will go high only when all of its inputs are
high, you would not ordinarily route multiple button presses directly into an AND.
This would mean that both buttons would have to be pressed simultaneously.
Instead, one or more inputs to the AND are usually latched signals, often used to
determine the current state of something in the system.
For example, assume that we want discreet power on and off control of an IR-
controlled VCR that only provides a toggling power function (on/off). Through the
40 • Crestron SIMPL Windows Primer – DOC. 6253