B&B Electronics I-7060 - Quick Start Guide - Manual (Page 41)

Getting Started for I-7000 Series Modules
Date: Jan-08, 2002 Version 1.02 page: 41
5.3 Module Watchdog
The I-7000 series modules are designed for industry applications. They
can be used under any conditions. Sometimes industry environments will
contain excessive noise or energy transient. The module might be affected
if these noises are excessive. If the working environment is not noisy, the
well-designed firmware will enable the I-7000 modules to run for years.
The
$AA5 command is designed to detect module-watchdog
failures. If the module is down, the module-watchdog (hardware circuit)
will reset this module. After reset, the output state of the module will revert
to pre-defined Power-On values. The Power-On values may be different from
the output-values previously used. Therefore, after the module-watchdog
resets, send the output command again to the module to restore the
previous Output State values.
Figure 5-3-1. Module-Watchdog will reset the module
when the module fails.