Programming The Watchdog Timer; Watchdog Timer Overview - Advantech VPS-3100 User Manual

A.1

Programming the Watchdog Timer

The VPS-3100's watchdog timer can be used to monitor system software operation
and take corrective action in the event of software failure. This section describes how
to operate and program the watchdog timer.
A.1.1

Watchdog Timer Overview

A watchdog timer is built into the NCT6106D I/O controller. It provides the following
user-programmable functions:
It can be enabled/disabled by user program

It can be set from 1 to 255 s or 1 to 255 min

In the event of software failure, it generates an interrupt or reset signal to reset

the timer before a time-out occurs
A.1.2 Programming the Watchdog Timer
The I/O port address (hex) of the watchdog timer is 2E (address port) and 2F (data
port). You must first assign the register address by entering the corresponding value
for the address port. Then, you can write/read data to/from the assigned register via
the data port.
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