M-7084 User Manual, Rev. A1.1 7PH-013-A11
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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 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
