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BLOCKsignalling
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Once the train has cleared the sensor, and the release time expires, then the "red
time" timer starts. When this expires, the signal switches to yellow and the "yellow
timer" starts.
When this expires, the signal switches to double yellow and the "double yellow timer"
starts. When this expires, the signal switches back to green and starts looking for
trains again.
The "release time" can be adjusted if slow moving trains cause the signal to
prematurely switch back to green before the train has cleared the sensor.
The "red time" can be adjusted to a realistic duration for a train to clear the section of
track protected by the signal.
The "yellow time" and "double yellow time" can be adjusted to a realistic duration for
the scale.
To use this mode, the module needs to be reprogrammed as follows.
To select this program, switch off the power to the module and hold down the Push
Button. Apply the power and continue holding the push button until
2 flashes
is
seen. At this point, release the button. You will see a long flash of two seconds and
then the led will begin flashing again.
When
4 flashes
have been seen press and hold the button. You will see a long flash
of five seconds and then 10 rapid flashes. The button can now be released and the
programming is complete. The module will start running the program. If you make a
mistake programming, simply repeat the process.
