Daktronics TI-2020 Multipurpose Track & Field LED Timing Display - Manual (Page 20)

14 Controls & Timing Functions
5.2 Program Operations
Individual operating programs are as follows:
1. Cross Country Clock (with normally open Start and Stop)
This program shows the time in MN:SC.TH.
The display counts up from 0 to 99:59.99, rolls over to 0:00, and continues to count.
After the initial START is received, additional START inputs will be ignored until the
clock is RESET to 0.00. Pressing STOP freezes the running time on the display to a
hundredth (0.01) of a second. The internal clock continues counting. RESET would set
the clock to 0.00. Pressing the RESET switch again would return the clock to the current
running time. The HORN input manually sounds the horn.
This mode also has the ability to program a countdown to start. Press RESET once to
reset the display to 0.00. Press and hold RESET. After two seconds a PR:(current
program #) will display for one second, then the countdown time will display. If 0 is
showing, the display will start counting up from 0. If for example the number 10 is
showing, the display will start counting up. While still holding the reset switch, toggle
the START to get the minutes, toggle STOP to get the seconds.
 START input will look for a normally open closure.
 STOP input will look for a normally open closure.
 HORN input will look for a normally open closure.
 RESET input will look for a normally open closure.
2. Marathon Clock (with normally open Start and Stop)
In this mode, the display shows time in HR:MN:SC format.
The display counts up from 0 to 99:59:59, rolls over to 0:00, and continues to count.
After the initial START is received, additional START inputs will be ignored until
the clock is RESET to 0.00. Pressing STOP freezes the running time on the display.
The internal clock continues to count. RESET sets the clock to 0.00. Pressing the
RESET switch again returns the clock to the current running time. The HORN
input manually sounds the horn.
This mode also has the ability to program a countdown to start. Press RESET once to
reset the display to 0.00. Press and hold RESET. After two seconds the PR:(current
program #) will display for one second, then the countdown time will display. If 0 is
showing, the display will start counting up from 0. If for example the number 10 is
showing, the display will start counting up. While still holding the reset switch, toggle
the START to get the minutes, toggle STOP to get the seconds.
 START input will look for a normally open closure.
 STOP input will look for a normally open closure.
 HORN input will look for a normally open closure.
 RESET input will look for a normally open closure.