Advantech MIC-3397, User Manual

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MIC-3397 User Manual 58
B.1 Watchdog Timer Programming Procedure
To program the watchdog timer, you must execute a program that writes a value to I/
O port address 443/444 (hex) for Enable/Disable. This output value represents time
interval. The value range is from 01 (hex) to FF (hex), and the related time interval is
1 to 255 seconds.
After data entry, your program must refresh the watchdog timer by rewriting the I/O
port 443 and 443 (hex) while simultaneously setting it. When you want to disable the
watchdog timer, your program should read I/O port 444 (hex).
Data Time Interval
01 1 sec
02 2 sec
03 3 sec
04 4 sec
...
3F
63 sec
etc.