Advantech UNO-2160, Руководство пользователя

Страница: 38 / 40

UNO-2160 User Manual 32
Appendix B Programming the Watchdog
Timer
To program the watchdog timer, you must write a program which writes
I/O port address 443 (hex). The output data is a value of time interval.
The value range is from 01 (hex) to 3E (hex), and the related time interval
is 1 sec. to 62 sec.
Data Time Interval
01 1 sec.
02 2 sec.
03 3 sec.
04 4 sec.
..
..
..
3E 62 sec.
After data entry, your program must refresh the watchdog timer by
rewriting the I/O port 443 (hex) while simultaneously setting it. When
you want to disable the watchdog timer, your program should read I/O
port 443 (hex).