FX-TRN-BEG-E E: Intermediate Challenge 5
B-51
5.1.3 Control Objective
Switch the traffic light signals in response to a pushbutton.
5.1.4 Control Specifications
1) The signal lamp
Red
(Y0) flickers at one-second intervals (ON for 1 second and OFF for 1
second).
2) When the pushbutton (X10) on the operation panel is pressed, the indicator (Y10) on the
operation panel is lit.
If the pushbutton (X10) is released, the indicator (Y10) remains lit.
3) After the indicator (Y10) is lit for 5 seconds, the operation of the signal is changed as
described in 4) to 7).
4) First, the signal lamp
Red
(Y0) flickers for 5 seconds while indicator (Y10) is lit.
5) The signal lamp
Red
(Y0) turns off. The signal lamp
Yellow
(Y1) is lit for 5 seconds.
6) After the lamp
Yellow
(Y1) is extinguished, signal lamp
Green
(Y2) is lit for 10 seconds.
7) After the signal lamp
Green
(Y2) turns OFF, the signal lamp
Red
(Y0) flickers at one-second
intervals (ON for 1 second and OFF for 1 second). The operations starting from 1) are
repeated.
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