Delay Symbol - Crestron SIMPL Windows User Manual

Software
Retriggerable One Shot Example: automatic power down
Touchpanel
fb115 press115
fb116 press116
fb117 press117
fb118 press118
fb119 press119
fb120 press120
fb121 press121
fb122 press122
fb123 press123
fb124 press124
fb125 press125
54 • Crestron SIMPL Windows
OR
i1 out
i2
i3
i4 pulse_time
i5
i6
i7
i8
i9
i10
0
pulse_time
You can program a system to detect inactivity and power down the equipment
automatically after a specified period of time has elapsed. The figure shown above is
a program to do just this.
Recall from the SIMPL Windows Programming chapter that time parameters can be
expressed in the HH.MM.SS.XXs format, where: HH = hours, MM = minutes, SS =
seconds, and XX = hundredths of a second. Thus in the above example the
'pulse_time' parameter of "3.00.00.00s" means 3 hours, 0 minutes, 0 seconds, and 0
hundredths of a second. When using this notation you can leave out the larger units if
you are not using them, thus "3.00.00s" would mean 3 minutes, 0 seconds, and 0
hundredths of a second (it would NOT mean 3 hours).
Note that an OR symbol is used to detect when a relevant button has been pressed,
and each press will cause the Retriggerable One Shot symbol to be retriggered, thus
starting the countdown over again. When 3 hours have passed with no buttons being
pressed, 'system_active' will go low. The 'system_active' output is routed into the
'trig*' input of a One Shot symbol, which will detect the falling edge of the signal
and activate its output accordingly.
The "0" signal on the 'trig' input of the One Shot symbol is required whenever you
only want to use 'trig*', due to the fact that the 'trig' input is a required (i.e., not
optional) input. Placing a 0 here tells the symbol to ignore this input at all times.

Delay Symbol

The Delay symbol is used to postpone an event for a given amount of time. Basically
the output signals will be exact replicas of the inputs (in terms of positive and
negative transitions), but delayed by the appropriate amount of time. The Delay
symbol also has a 'reset' input, which cancels any impending output events.
At first glance you might think that the Delay symbol presents an easier way of
building the auto-power-down example shown in the previous section using the
Retriggerable One Shot symbol. However, two factors prevent you from using the
Delay symbol in this application. First, the Delay is not retriggerable, but instead it
Crestron SIMPL Windows
Retriggerable One Shot
trig
trig*
reset
3.00.00.00s
One Shot
1
trig out
trig* out*
reset
0.5s
out
System_Active
out*
Buffer
enable
in1 out1
Vproj_Off
in2 out2
Screen_Up
in3 out3 Lights_Off
Primer – DOC. 6253