ICP DAS USA I-87211W User Manual page 82

WatchDog timeout has occurred.
The Host WatchDog status is stored in EEPROM and can only
be reset by using the ~AA1 command.
There will be no response if the command syntax is incorrect,
there is a communication error, or there is no module with the
specified address.
Examples:
Command: ~010
Response: !0104
Reads the Host WatchDog status of module 01
and the response shows that a Host WatchDog
timeout has occurred.
Command: ~070
Response: !0700
Reads the Host WatchDog status of module 07
and the response shows that a Host WatchDog on
the module is disabled and timeout has not
occurred.
Related Commands:
Section 2.27 ~**
Section 2.29 ~AA1
Section 2.30 ~AA2
Section 2.31 ~AA3EVV
Section 2.32 ~AA4V
Section 2.33 ~AA5V
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I-87211W User Manual