I-7088 and M-7088 User Manual, Rev: A1.2 7MH-026-A12
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A.2. Dual Watchdog Operation
Dual Watchdog = Module Wa Host Watchdog
The Module Watchdog is a hardware reset circuit that monitors the
operating status of the module. While working in harsh or noisy
environments, the module may be shut down by external signals.
The reset circuit allows the module to work continuously without
disruption.
The Host Watchdog is a software function that monitors the
operating status of the host. Its purpose is to prevent problems due
to network/communication errors or host malfunctions. When a Host
Watchdog timeout occurs, the module will reset all outputs to a safe
state in order to prevent any erroneous operations of the controlled
target.
I-7000 and M-7000 series modules include an internal Dual
Watchdog, making the control system more reliable and stable.
For more information regarding the Dual Watchdog, please refer to
Chapter 5 of the “Getting Started for I-7000 Series Modules” manual
that can be downloaded from the ICP DAS website
http://www.icpdas.com
.
