M-7065 User’s Manual
Ver2.0, Dec. /200
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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
The M-7065 DIO module include an internal Dual Watchdog,
making the control system more reliable and stable.